Hydraulic rock drill HL 700, HL 710, HL 700 S, HL 710 S; Lifting instructions

HYDRAULIC ROCK DRILL HL 700, HL 710, HL 700 S, HL 710 S

LIFTING INSTRUCTIONS

CORRECT INCORRECT

Max.
55_

HL 700, HL 710 . . . . . . . . . . . . . . 245 kg

HL 710 Power Extractor . . . . . . 300 kg
HL 700 S, HL 710 S . . . . . . . . . . . 245 kg

D 20105--2 en 0507 / MS 1 (1)

 HL 710, HL 710S

B 22310--2 en 0507/LH 1 (22)

HL 710, HL 710S

CONTENTS

1. GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2. TAKING A NEW ROCK DRILL INTO USE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.1. Preparations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.2. Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.3. Test run . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3. HOSE CONNECTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
4. LUBRICATION SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4.1. Lubrication system, underground model . . . . . . . . . . . . . . . . . . . . . . . . 6
4.2. Lubrication system, surface model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
5. FLUSHING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
6. INSPECTION AND MAINTENANCE OF FRONT END WITH ROCK
DRILL IN CARRIAGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
6.1. Assembly directions of seals and bearing bushing . . . . . . . . . . . . . . 12
6.2. Changing the bearing of the flushing housing . . . . . . . . . . . . . . . . . . . 12
6.3. Assembling the flushing housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
6.4. Coupling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
6.5. Rotation bushing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
6.6. Chuck . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
6.7. Front bearing of gear housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
6.8. Chuck and lock ring pair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
6.9. Wear limits of shank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
7. CHECKING AND TIGHTENING BOLTS AND TIE RODS . . . . . . . . . . . . . . . . . . 15
7.1. Tie rod tightening . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
7.2. Pressure accumulator bolts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
7.3. Idle gear shaft . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
7.4. Assembly of rotation motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
7.5. Rotation motor bolts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
7.6. Flushing device bolts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
8. PERIODIC MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
8.1. General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
8.2. Maintenance tools-- and parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
8.3. Daily, after work shift . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
8.4. Every week . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
8.5. Basic maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
8.6. After rock drill service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
8.7. Service card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
8.8. Service follow-- up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

2 (22) B 22310--2 en 0507/LH

 HL 710, HL 710S

1. GENERAL
These instructions describe in brief the main maintenance procedures for HL 710 series
hydraulic rock drills.
Sandvik Service is always ready to help and give advice in all maintenance problems. The
qualified maintenance personnel of your Sandvik dealer and original Sandvik spare parts
ensure reliable operation of your drilling equipment.

2. TAKING A NEW ROCK DRILL INTO USE

2.1. Preparations
New rock drills are delivered with the pressure accumulators not
pressurized and the hose connections plugged.

1. Pressurize the accumulators according to the instructions. See “Pressure

accumulator reparation instructions”.
2. Before a new rock drill is installed the drilling equipment hydraulic system must be
checked and flushed thoroughly.

2.2. Mounting
The rock drill is mounted on the carriage with four pairs of bolts. In order to avoid
damage it is important to follow the tightening order;

Fig 1. Mounting to carrier

Put the drill and carriage mounting faces first slightly together. ( no clearance between drill
and carriage )
1. Retighten bolts A to 300 Nm.
2. Retighten bolts B and C to 300 Nm.
3. Tighten bolts A to 600 Nm.
4. Tighten bolts B and C to 600 Nm.
When replacing bolts, loosen all bolts and retighten in correct order.

B 22310--2 en 0507/LH 3 (22)

HL 710, HL 710S

2.3.
Test run the rock drill and make sure that it operates properly before starting production
drilling.
Check during test run
-- shank lubrication
-- pressures and temperatures
-- flushing
-- possible oil leakages
Avoid use of full percussion power if the steel is not against the rock.
This will reduce the breakage of the accumulator diagrams, the wear of
flushing housing and the cavitation of the percussion mechanism. This
type of ”idling drilling” is the most critical while drilling upwards or
cleaning the holes with pumping motion.

3. HOSE CONNECTIONS

Fig 2. Hose connections

1. Shank lubrication 6. Rotation, case drain line

2. Percussion mechanism pressure side (H.P.) 7. Rotation, return (L.P.)
3. Percussion mechanism return side (L.P.) ( Ø 8 8. Rotation, pressure (H.P.)
mm)
4. Flushing
5. Shank lubrication collector

4 (22) B 22310--2 en 0507/LH

 HL 710, HL 710S

4. LUBRICATION SYSTEM
The rock drill percussion mechanism and the rotation motor are lubricated by the hydraulic
oil flowing through them.
he rotation mechanism and the shank have oil mist lubrication. The lubrication line from
the central oiler is connected to the spacer of the rock drill (Fig. 2, connection 1). From
there the oil mist is ducted to the front end of the rock drill where the flow will lubricate the
stabilizer pins, rotation mechanism, coupling and the bushing of the flushing housing.
In the UG-- version (fig. 3) the continue lubrication airflow is conducted out via the canal
(3), to the drain hole.
In the SF--version (fig. 4) the excess oil is conducted out via the canal (2), to the drain hole.

The oil that has circulated through the rock drill lubrication system is removed through the
shank lubrication collector (5) fig. 2. The used oil can be led with a hose into a container.

B 22310--2 en 0507/LH 5 (22)

HL 710, HL 710S

4.1. Lubrication system, underground model

Fig 3. Lubrication system; underground model, HL 710 S

6 (22) B 22310--2 en 0507/LH

 HL 710, HL 710S

4.2. Lubrication system, surface model

Fig 4. Lubrication system; surface model, HL 710

B 22310--2 en 0507/LH 7 (22)

HL 710, HL 710S

Fig 5. Shank lubrication (Surface -- model)

1. Rock drill 3. Drain valve

2. SLU 1/2/3 4. Filling cap

1. The oil consumption of the shank lub is adjustable. **

2. If the oil level don’t decrease during drilling. **
3. Drain regularly the water that has collected in the oiler. The draining interval
depends on the local conditions.
4. Only use oil mentioned in the oil recommendation instructions.
5. Refill the SLU 1/2/3 oiler regularly
** Please refer to the SLU 1/2/3 instructions

8 (22) B 22310--2 en 0507/LH

 HL 710, HL 710S

Fig 6. Shank lubrication (Underground -- model)

1. Rock drill 5. Connection nipple

2. Oiler 6. Sight glass
3. Drain valve 7. Regulating valve
4. Filling cap

1. The shank lubrication oil consumption should be adjusted to min. 400 grams an
hour per drill or more depending on the hole diameter and other local
conditions. Check the function of the shank lubrication by looking at the sight
glass of the oiler and check with hand that the oil is coming to the shank lubrication
nipple.
2. --If the oil level in the oiler does not lower during drilling, the reason may be that
:
-- the regulating valve (7) is blocked up.
-- the compressor’s oil separation does not function . The compressor oil
flows with air in to the oiler.
-- the oil is too thick for the temperature.
-- In each of the above--mentioned cases the fault should be remedied
without delay.
3. Drain regularly the water that has collected in the oiler. The draining interval
depends on the local conditions.
4. Only the oils mentioned in the oil recommendation are allowed.
5. Refill the oiler regularly.
6. If compressed air is taken from the mine’s air supply network or the drill rig’s
compressor does not have a water separator, the compressed--air line should be
fitted with such a separator.

B 22310--2 en 0507/LH 9 (22)

HL 710, HL 710S

5. FLUSHING

Fig 7. Rock drill with water flushing (underground drilling)

1. Flushing housing
2. Water pressure gauge
3. Pilot--controlled flushing valve.
4. Drain holes for seal leakages for underground version.
5. Drain holes for seal leakages for surface version.
The structure of the air-- and water flushed rock drills are, except for the flushing housings,
identical.
The most common reason for seal damages is water. The water can get into the rock drill
from outside the flushing housing, if the rock drill is in a vertical position, and the flushing
is off.
The water can also get in with the flushing air, if the water hasn’t been drained regularely.
The water in the front end of the rock drill can cause cavitation corrosion in parts of the
body and the piston located near the piston seal and the wiper ring.

10 (22) B 22310--2 en 0507/LH

 HL 710, HL 710S

6. INSPECTION AND MAINTENANCE OF FRONT END WITH ROCK

DRILL IN CARRIAGE

You can also detach the flushing housing without having to remove the rock drill from the
carriage by opening the bolts (1) and the nuts. The coupling and the shank will also detach,
as well as the rotation bushing and the chuck opening the lock bolt (2). Always check
these items when replacing the shank.

Fig 8. Dismantle of flushing housing

Always check the condition of the rotation bushing and the chuck when
replacing the shank.

Use the shank when removing the lock washers (1). Remove the cover (3) and the
connector flange (2) before removing the seal housing.

Fig 9. Dismantle of tube--version flushing housing

B 22310--2 en 0507/LH 11 (22)

HL 710, HL 710S

6.1. Assembly directions of seals and bearing bushing

The seals are the most delicate and important parts of the rock drill. Always replace all of
the o--rings and the seals when dissembling the the rock drill.

Drainholes Drainholes
A

1 2 3

1 2 3
B
Fig 10. Assembly directions of seals and bearing bushing
Assemble the seals (1, 2 and 3) either according to A (water flushing and water mist
flushing), or B (air flushing).
Replace the flushing house seals and assemble the bearing bushing (1) correctly,
accordingly to fig 10.

6.2. Changing the bearing of the flushing housing

The bearing must be changed if the wear indication--groove has
worn out (see picture). Open the front cover and press out the
bearing by using a hydraulic press and the special tools’ punches.

12 (22) B 22310--2 en 0507/LH

 HL 710, HL 710S

6.3. Assembling the flushing housing

Place the connector flanges’ holes of the flushing housing and the seal housing in line and
press the flushing housing in. Assemble the connector flange and the front cover. Check
the seals.
Tube flushing housing
Assemble the shank and the lock washers into the flushing housing. Turn the shank in a
vertical position, and hit the lock washers in with the help of the shank.

90

Fig 11. Assembly of the tube flushing housing lock rings.

6.4. Coupling
Pull the coupling out from the rotation bushing. Check and re-
place, if the edges of the inner teeth are worn sharp.

6.5. Rotation bushing

Check the teeth and the bearing surface for wear.

B 22310--2 en 0507/LH 13 (22)

HL 710, HL 710S

6.6. Chuck
The chuck inside the rotation bushing must be replaced if the sur-
face has worn down 1 mm (see picture), it has cracks or if the
shoulder has worn down to the surface. Use a hydraulic press
and a appropriate punch for the job.

6.7. Front bearing of gear housing

The bearing must be changed if the wear indicating grooves
have worn out as shown in the picture. Remove the bearing by
using punch and hydraulic press.

6.8. Chuck and lock ring pair

Must be changed if the pair depression is 1 mm / if there are
cracks on the surface or chuck‘s shoulder is worn down in the
surface.

6.9. Wear limits of shank

The shank must be changed if the 2 mm bevel of the striking
head or 1 mm of the splines is worn out or any other wear limit is
exceeded.

When installing a new shank, take care that no dirt enters inside the rock
drill with the shank. Insert the shank carefully through the flushing
device, so that the flushing device seals are not damaged.

14 (22) B 22310--2 en 0507/LH

 HL 710, HL 710S

7. CHECKING AND TIGHTENING BOLTS AND TIE RODS

Perhaps the most important maintenance task is to check the tightness of the
bolts, particularly the tie rods and mounting bolts. Loose tie rods cause rapid wear
of the body section faces, shortening the service life of the rock drill.
If the threads are not clean the bolts cannot be tightened correctly. In such cases the bolt
must be removed, and the threads checked, cleaned, and lubricated with grease.
Following procedure is recommended for checking the bolt tightness during
normal maintenance:
-- check the tightness each bolt by using 10 higher torque than specified.
-- the joint being tested is loose if the wrench turns. In this case loosen all the
bolts being tested and retighten in the correct order.

Fig 12. Rock drill bolts

1. Tie rods 5. Idle gear shaft bolts

2. Pressure accumulator bolts 6. Connecting piece bolts and front cover bolts
3. Rotation motor bolts 7. Rear cover bolts
4. Flushing device bolts

B 22310--2 en 0507/LH 15 (22)

HL 710, HL 710S

7.1. Tie rod tightening

The tools required:
-- torque wrench
-- 24 mm socket
1. Lubricate the threads and the nut faces with grease.
2. Tighten first slightly the rear nuts (A) to bottom.
3. Pre--tighten the front nuts (B) to 200 Nm (20 kpm). Correct tightening order is
1--2--3--4.
4. Final tightening torque is 400 Nm (40 kpm). Same tightening order (1--2--3--4)
should be used.

Fig 13. Tie rod tightening

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 HL 710, HL 710S

7.2. Pressure accumulator bolts

Required tools:
-- torque wrench
-- 24 mm socket

1. Lubricate the threads and the nut faces with grease

2. Pre--tighten all four bolts to 100 Nm (10 kpm). Correct tightening order is 1--2--3--4.

3. Final tightening torque is 200 Nm (20 kpm). Same tightening order (1--2--3--4)
should be used.

7.3. Idle gear shaft

Required tools:
-- torque wrench
-- 24 mm socket

1. Lubricate the threads and the nut faces with grease

2. Install the washers and the bolts. Pre--tighten the bolts to 100 Nm (10 kpm). Final
tightening torque is 200 Nm (20 kpm).

Fig 14. Washers and bolts (5)

B 22310--2 en 0507/LH 17 (22)

HL 710, HL 710S

7.4. Assembly of rotation motor

2
1

Detach the flushing housing (1) and the gear housing before assembling
the motor.

7.5. Rotation motor bolts

Required tools:
-- torque wrench
-- 24 mm socket
1. Lubricate the threads and the nut faces with grease

2. Pre--tighten all four bolts to 100 Nm (10 kpm). Correct tightening order is 1--2--3--4.

3. Final tightening torque is 150 Nm (15 kpm). Same tightening order (1--2--3--4)
should be used.

Fig 15. Rotation motor bolts

18 (22) B 22310--2 en 0507/LH

 HL 710, HL 710S

7.6. Flushing device bolts

The tools required:
-- torque wrench
-- 36 mm socket
1. Lubricate the bolt and nut threads with grease.
2. Pre--tighten all four bolts to 300 Nm (30 kpm). Correct tightening order is 1--2--3--4.
3. Final tightening torque is 600 Nm (60 kpm). Same tightening order (1--2--3--4)
should be used.

Fig 16. Flushing device (4) tightening order

_ Alternative for tightening flushing device bolts: Pre--tighten up to

200 Nm and then turn 30_ more , see picture.

8. PERIODIC MAINTENANCE

8.1. General
The idea of periodic maintenance is that the rock drill is serviced before any breakdown
occurs. This way expensive additional damages and unwanted stops can be avoided.
The maintenance intervals are different depending on the local conditions, and they must
therefore be determined according to the experience.
Searching for the correct maintenance interval, it is advisable to start the periodic
maintenance as specified, and then lengthen the intervals until a period that suits the local
conditions has been found.
In addition the rock drill should always be taken in for service when the operator reports
of a fault that can result in major damage or a production stop.

B 22310--2 en 0507/LH 19 (22)

HL 710, HL 710S

8.2. Maintenance tools-- and parts

Ensure that the operator has on the rig proper tools and parts for daily and weekly
maintenance tasks.
The rock drill tool set includes torque wrench and sockets. Due to tight dimensions a
socket and wrench adapter is required for tightening the rock drill front and rear mounting
bolts on the carriage.

Fig 17. Maintenance tools

Other rock drill parts which are to be available at the rig for maintenance are flushing
device gasket, flushing seals and shank adapter.

8.3. Daily, after work shift

1. Check flushing device bolt tightness.

2. Check seal tightness during drilling by observing the check holes (1) and (3), Fig.
3
3. Check possible oil leaks .
4. Check hoses and connections .
5. Check the mounting of the rock drill to the carriage. If it is not tight, loosen
up the mounting bolts. After that fasten up the bolts with right order (Section
2). Also check the retighten the tie rods always when the rock drill mounting to the
carriage has required retightening.

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 HL 710, HL 710S

8.4. Every week

1. Check hour meter reading.
2. Check accumulator filling valves and their protective caps and the accumulator
bolt tightness.
3. Check accumulator pressures.
4. Check rotation motor and rear cover bolts tightness.
5. Check idler gear shaft bolts for tightness.
6. Check condition of shank, chuck, flushing housing, coupling, shank and rotation
bushing.
7. Check tie rod tightness. If they are not tight, loosen up the middle pair of
mounting bolts. After that fasten up the tie rods with right fastening order
(Section 7.1) and then fasten the middle pair of mounting bolts.

8.5. Basic maintenance

Check percussion hour meter gauge. Rock drill basic maintenance is recommended
every 500 operating hours, Cf. “Repair Instructions’’. Fill out the service card.

8.6. After rock drill service

After rock drill service the reassembled parts will settle down to their proper position during
drilling under normal drilling loads. Especially when parts have worn surfaces it may result
that the tie rods and mounting bolts do not keep their tightness. Therefore retightening
of bolts is required shortly after each rock drill service or if the rock drill has been
off from the feed.

8.7. Service card

Each rock drill has its own service cards. When a rock drill is taken up for maintenance,
all the earlier cards should be at hand. All relevant information about the maintenance
must be written down on the card. When the rock drill is again taken into use, the next
maintenance date should be written down on the card. Benefits of the card;
Wear of every specific component of each rock drill is clearly displayed, and by comparing
the cards the effect of different circumstances and measures can be determined.
-- The cards help in determining maintenance required to prevent major damage.
-- Properly filled cards show the complete maintenance history of the rock drill.
-- The cards help to determine the point when the rock drill should be scrapped.

8.8. Service follow--up

In order to follow the maintenance of a rock drill, a maintenance card presented below can
be used.

B 22310--2 en 0507/LH 21 (22)

HL 710, HL 710S

22 (22) B 22310--2 en 0507/LH

 HL 710, HL 710S; Repair instructions

D 22310--4 en 0507 / MS 1 (32)

HL 710, HL 710S; Repair instructions

2 (32) D 22310--4 en 0507 / MS

 HL 710, HL 710S; Repair instructions

CONTENTS

1. GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2. REPAIR INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3. TOOLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4. SEALS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
5. DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
5.1. Disassembly of the front end . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
5.2. Removal of the pressure accumulators . . . . . . . . . . . . . . . . . . . . . . . . . 12
5.3. Hydraulic motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
5.4. Removal of the percussion mechanism . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.5. Percussion mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.6. Body cylinder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5.7. Disassembly and assembly of the spacer bearing and
seal housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5.8. Disassembly and assembly of the gear housing . . . . . . . . . . . . . . . . . 20
6. ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
6.1. Assembly of the idler gear and the spacer . . . . . . . . . . . . . . . . . . . . . . 23
6.2. Assembly of the front cylinder and the body cylinder . . . . . . . . . . . . 24
6.3. Tightening the tie rods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
6.4. Percussion mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
6.5. Rear cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
6.6. Assembly of hydraulic motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
6.7. Assembly of the pressure accumulators . . . . . . . . . . . . . . . . . . . . . . . . 28
6.8. Assembly of the front end . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
7. WEAR LIMITS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
8. TEST RUN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

D 22310--4 en 0507 / MS 3 (32)

HL 710, HL 710S; Repair instructions

1. GENERAL
These instructions are intended for persons who have to service and repair the
710--series hydraulic rock drills. Familiarize yourself thoroughly with these instructions
and utilize the information contained therein when dismantling, assembling and servicing
the drill.
Always use a crane when tilting the rock frill in the assembly stand.

2. REPAIR INSTRUCTIONS
Follow the instructions of the periodic maintenance chart. Properly arranged advance
maintenance helps to achieve maximum machine availability. Change worn parts for new
ones in time to avoid more serious damage.
Check the cleanness of the parts carefully before the assembly; new parts, too, may be
dirty (a bottle brush is a useful aid for the cleaning of the drill’s cylinder parts).
The use of pirate components (components other than original spare parts) has been
found to increase costs in nearly all cases. The warranty of the entire system will terminate
immediately if any one of the parts is found to have been replaced with a pirate
component.
Checking of the tie rods’ tightness is one of the most important maintenance measures
to be done to the drill. Neglect of this measure can lead to rapid wear of the face surfaces
between the body parts. Good functioning of the drill depends very much on the place
where it is repaired. Keep the repair place clean.
Repair place furnishing example:

Features of a good repair place are:

-- good lighting
-- good washing facilities
-- compressed air available
-- dustless
-- needed literature
-- adequate tools
Fig 1. Repair place
1. Spare part store 6. Vice
2. Hydraulic press, 30 t. 7. Drilling machine
8. Tools
4. Washing 9. Assembly stand
5. Rubber surfaced work bench 10. Hoist

It’s forbidden to use the drill bit grinder in the repair place.

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 HL 710, HL 710S; Repair instructions

3. TOOLS
Sandvik supplies ready tool set for drill repair work. See the tool sets’ spare part sheet.
Figures 2, 3 and 4 show the tools needed in repairs, the tools being grouped according
to the work phases.

Fig 2. Tools for the rock drill disassembly and assembly

Fig 3. Tools used with the hydraulic press

Fig 4. Tools for the disassembly, assembly and testing of the pressure accumulator

D 22310--4 en 0507 / MS 5 (32)

HL 710, HL 710S; Repair instructions

Fig 5. Special tools

6 (32) D 22310--4 en 0507 / MS

 HL 710, HL 710S; Repair instructions

D 22310--4 en 0507 / MS 7 (32)

HL 710, HL 710S; Repair instructions

4. SEALS
Seals are some of the most delicate and important parts of the rock drill. When the rock
drill is dismantled, all the seals and O--rings has to be changed.
Seals removing:

Be careful not to scratch the drill’s interior parts and sealing

grooves.

Fig 6. Removing of seals

Do not scratch the sealing grooves.

Assembly of percussion piston seals:

When fitting the seal in place , push lightly it to both directions at

same time so that o--ring will settle in the correct position. (see
arrows in the picture). The lip of the seal (a) is especially vulner-
able for damages Eg. if handled carelessly when assembling the
seal (fig 7).

Fig 7. The way to fit the seal

Heating the seals in oil to 50 -- 60 C makes it easier to fit them in

place.
When fitting the seals do not use other tools than your fingers. Be
careful not to use your nails.

Fig 8. The lip of the seal

Lubricate the seal groove with oil. Bend the seal as shown in pic-
ture 9.

Fig 9. The way to bend the seal

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 HL 710, HL 710S; Repair instructions

Preservation of seals:
-- Keep the seals in their package, away from direct sunlight.

At the installation keep the seals clean.

Fig 10. Spacer and seal housing Installing directions and centralizing of piston seals

Centralizing the piston seals ; Lightly push and rotate oiled piston through the seals in the
direction indicated by the arrows in the picture. The seals will settle in the correct
position
Check that the seals sealing lips are undamaged.
Install the O--rings of the front and rear cylinders in their grooves.

Note the correct position of the seal lip.

D 22310--4 en 0507 / MS 9 (32)

HL 710, HL 710S; Repair instructions

If the seals do not last a normal changing interval, the reason is usually one of the
following:
-- The filter is plugged or of wrong type (not original)
-- Wrong oil quality
-- Seals have been fitted wrong
-- Seals have been damaged on assembly
-- Water in oil
-- The condition of the sliding surfaces is poor

5. DISASSEMBLY
Rock drill HL 710 has to be disassembled and the components to be checked after every
500 drilling hours.
Disassembly and assembly of the rock drill requires from the performer professional skill
and practical knowledge of these machines. The working room should be dry, dustless
and clean.
There should also be a wash--basin and compressed air available for the cleaning of the
drill components.
Before the disassembly the drill should be washed on the outside for example with a
high--pressure water spray. In addition to this we recommend that the drill is washed on
the outside also with a brush and suitable solvent before it is taken to the actual servicing
place. A split barrel suits this purpose well.

Fig 11. Assembly stand

Required tools:
-- 30, 36, 41 mm spanner

Fit and secure the locking latch (1) with bolts (3). Mount the drill to the
assembly stand with front and rear bolts (2).

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 HL 710, HL 710S; Repair instructions

Fig 12. Hydraulic rock drill HL 710, HL 710S

D 22310--4 en 0507 / MS 11 (32)

HL 710, HL 710S; Repair instructions

5.1. Disassembly of the front end

Fig 13. Disassembly of the front end , See operation and maintenance

5.2. Removal of the pressure accumulators

Before removing the accumulators from the drill release the pressure by
opening the filling valves

Fit immediately a cover plug to the opening in the body.

See instructions ”Pressure Accumulators”.

Fig 14. Removal of pressure accumulators

Required tools:
-- Torque wrench
-- 24 mm socket
Open the fastening bolts of the accumulator (fig 14). Dismount the accumulator and the
gasket.

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 HL 710, HL 710S; Repair instructions

5.3. Hydraulic motor

Fig 15. Disassembly of the hydraulic motor

Required tool:
-- spanner
Open the hydraulic motors fastening bolts, and pull the hydraulic motor package from the
gear housing. Remove the O--ring. Open the cover bolts. Pull the rotation shaft from the
bearing housing with the puller (092 864 58) and punch (088 277 08)

16

Fig 16. Parts of the hydraulic motor

2. Housing 10. Rotation shaft
3. Lock nut 11. Button
4. Lock washer 12. Shaft seal
5. Spherical roller bearing 13. O--rings
6. Circlip 14. O--rings
7. Cover 15. Cylindrical roller bearing inner ring
8. Bolt 16. Lock washer

D 22310--4 en 0507 / MS 13 (32)

HL 710, HL 710S; Repair instructions

Hydraulic motor assy

Fig 17. Hydraulic motor assy

Use the assembling punch (1) from the tool set when you pull rotation
shaft through the cover so seals do not damaged.

Assembling order (fig 17):

1. Bearings inner track (15) on shaft (10)
2. Seals. Assemble the cover seals (12) by using a punch (152 537 28) and the
circles.
3. Assemble the cover (7) with it seals on the shaft by using the punch (1)
4. Assemble the bearing (5) onto the shaft (10), tighten the nut (3) and secure it with
the locking washer and some glue.
5. Assemble the shaft sassy. into the bearing housing (2).
6. Cross--tighten the cover--bolts (8)
-- pre--tightening 10 Nm
-- final tightening 32 Nm

Observe the locking of locking washers and threads with glue.

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 HL 710, HL 710S; Repair instructions

Removal the tie rods

Fig 18. Removal the tie rods

Open the nuts of the tie rods and push the tie rods out.
5.4. Removal of the percussion mechanism

Fig 19. Removing the rear cover and the piston unit
Removal of the rear cover
Required tools:
-- Spanner 30 mm
Release the locking latch and the bolts (2 pcs) from the assembly stand rear end. Turn
the drill upright position by using a hoist. Undo the bolts and lift the rear cover off (see
figure ). Remove the O--ring. Check the wear of the rear cover (see chapter ”Wear limits”).
Removal of the percussion mechanism
Required tool:
-- Punch
Screw the puller into the piston (see figure ). Lift the piston out from the cylinder. The rear
cylinder, rear bearing, distributor and the seal housing will follow the piston.

D 22310--4 en 0507 / MS 15 (32)

HL 710, HL 710S; Repair instructions

5.5. Percussion mechanism

Fig 20. Percussion mechanism

Disassemble the piston assembly by removing the rear cylinder, the rear bearing and also
the distributor.

Examine the piston and replace it, if:

D the striking head is worn as deep as the bevel is
D there are fractures and seizing marks on the piston.
When necessary, piston can be polished with a buffing wheel. Piston must not be ground.
Examine the distributor if:
-- If there are burrs in the distributor, remove them by polishing with a buffing wheel
(light scratches)
-- If there are seizing marks in the distributor, change a new part.

Rear cylinder must not be ground.

Examine the rear cylinder

-- If there are burrs in the rear cylinder, remove them by polishing with a buffing wheel
(light scratches).
-- Use a new part if there is grooves which you noticed by finger on the cylinders
sliding surface.
-- Change new o--rings

Rear cylinder must not be ground.

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 HL 710, HL 710S; Repair instructions

5.6. Body cylinder

Removal of the body

Take off the rear mounting bolts from the

assembly table. Lift the body cylinder off
(fig 21). Use the accumulator bolts for the
lifting. At the same time remove the front
cylinder. Inspect the wear limit measures of
the face surfaces.

Fig 21. Removal of the body

Removal of the front cylinder bearing

Replace the bearing bushing of the

front cylinder only, if it is damaged.
Press the bolts on the special tool (1)
against each other and fit the tool into the
bearing (2) groove of the front cylinder.
Press the bearing out by using a punch (3)
and a thrust (4).

Fig 22. Removal of the front cylinder bearing

D 22310--4 en 0507 / MS 17 (32)

HL 710, HL 710S; Repair instructions

5.7. Disassembly and assembly of the spacer bearing and seal

housing
Detach the spacer from the gear housing and check the bearing surface for wearing.
Replace the spacer if the indication grooves (A) have worn out.
1. Disassembly

A
3

Fig 23. Removing the bearing

2. Auxiliary punch 550 055 27

3. Punch for removing 550 342 21

2. Assembly
Cool the bearing to --20 C before installation.

B C
2 Align long groove B of the
bearing with spacer marking
C. Pay attention to locking
surface.

Fig 24. Installing the bearing

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 HL 710, HL 710S; Repair instructions

Seal housing must be replaced if the seal groove in the spacer is wider than 4,35 mm. Use
the tool 150 746 48 to check the width.

1 4
2
6
5

3 A B

Fig 25. Removal and installation of the spacer seal housing. Use a hydraulic press.

1. Disassembly
2. Assembly
3. Locking rings 550 055 28
4. Punch for removing 550 055 27
5. O--ring
6. Use proper punch for assembling the seal housing. Install to the level of the spacer
surface.
Position the groove B of the seal housing in line with the groove A of the spacer.

Clean the spacer and the seal bushing carefully before installation.

D 22310--4 en 0507 / MS 19 (32)

HL 710, HL 710S; Repair instructions

5.8. Disassembly and assembly of the gear housing

Turn the rock drill into horizontal position with a hoist. Lock the mounting plate with bolts
(2pcs) and the latch located in the rear end of plate.

Required tools:
-- 24 mm spanner
-- puller
Remove the screws and remove the
shaft with puller. Let the idler gear to fall
down and remove the rings.
Check the wear of the rings and the shaft
surface. If necessary, change new parts.

Fig 26. Removing the idler gear

Required tools:
-- Punch
-- Thrust
The needle bearings must be changed
after every 500 drilling hours. Use a
hydraulic press to press with the punch
the needle bearings out from the idler
gear. Check the wear of the idler gear
teeth.When necessary, change a new
part

Fig 27. Assembly of the needle bearings

Assembly of the needle bearings
Using a hydraulic press push the first needle bearing into the idler gear. Turn the gear
around and press the second needle bearing in.

Make sure the thicker edge of the needle bearing points outwards and
comes flush with the surface of the idler gear.

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 HL 710, HL 710S; Repair instructions

Disassembly and assembly of the gear housing

Check the wear limits of the gear housing (see page 31).

Fig 28. Parts of the gear housing

1. Housing 8. O--ring
2. Rear bushing 9. Bonded seal
3. Front bushing 10. Plug
4. Bushing 11. Retaining screw
5. Cylindrical roller bearing without inner ring 12. Socket
7. Seal

Bushings of the idler gear shaft

Check the wear of the bushings and shaft.

When necessary, change new parts. Push
the first bushing out by hydraulic press and
punch. The second bushing is removed by
using special punch and puller. See the
picture. Assembly the bushings with a
punch.

D 22310--4 en 0507 / MS 21 (32)

HL 710, HL 710S; Repair instructions

Front bushing of the gear housing

The bearing must be changed if the wear indicating grooves

have worn out as shown in the picture. Remove the bearing by
using punch and hydraulic press.

Detachment of front bushing

When using a screwdriver, be sure not to scratch the inner surface of the
gear housing.

The gear housing rear bushing

The bearings must be changed by using a punch and a hydraulic

press, if the wear indication groove has worn out as shown in the
picture .

Cylindrical roller bearing

Cylindrical roller bearing

Remove the plugs, circlip and bushing. Remove the bearing by
using punches and hydraulic press as shown in the picture
Mounting
Mount the bearing by using punch and hydraulic press . The riv-
ets of the bearing pin housing must be point to back of the rock
drill . Mount the inner ring of the bearing with shaft assy . The
bearing must be changed after every 500 drilling hours.

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 HL 710, HL 710S; Repair instructions

6. ASSEMBLY
Exercise particular care when assembling the rock drill. Check that all parts are absolutely
clean.
Before assembling the drill check all the wear parts, such as bearings and pressure
accumulator diaphragms (See ”Pressure Accumulators”), and replace with new ones
when necessary. All wear limits of the parts are indicated in the ”Wear limit chart” (See
Section 7). Before the assembly the parts should be lubricated for example with motor
oil.
All joint surfaces must be absolutely dry and clean.

Assembly stand
The assembly of the drill is started with the assembly stand in the horizontal position. Make
sure that the fastening bolts (2 pcs) and the locking latch are secured and closed.
Mount the gear housing assembly onto the assembly stand. Tighten the bolts.

6.1. Assembly of the idler gear and the spacer

Assembly of the idler gear

Required tools:
-- Torque wrench
-- 24 mm socket
Fit the slide ring and the idler gear into the
gear box. Push the shaft in by hand to
o--ring. Knock the shaft carefully in with
rubber hammer. Make sure the rings stay in
place during the assembly. Tighten the
screws to the torque of 200 Nm (20 kpm).
Use new locking washer pairs
Fig 29. Assembly of the idler gear and shaft

D 22310--4 en 0507 / MS 23 (32)

HL 710, HL 710S; Repair instructions

Assemble the spacer assy into gear house

Assembly stand
Turn the assembly table to upright position

6.2. Assembly of the front cylinder and the body cylinder

Lower the body cylinder carefully down . Tighten slightly the assembly table rear mounting
bolts.

Fig 30. Assembly of the front cylinder and the body cylinder

24 (32) D 22310--4 en 0507 / MS

 HL 710, HL 710S; Repair instructions

6.3. Tightening the tie rods

Turn the assembly table to horizontal position using a hoist. Lock the mounting plate with
bolts (2pcs) and the latch located in the rear end of plate.
Required tools:
-- Torque wrench
-- 24 mm socket
1. Lubricate the threads and the nut faces with grease.
2. Tighten first slightly the rear nuts (A) to bottom. Pre--tighten the front nuts (B)
to 200 Nm (20 kpm). Correct tightening order is 1--2--3--4.
3. Tighten the body cylinders rear to the assembly table.
4. Final tightening torque is 400 Nm (40 kpm). Same tightening order should be
used.

Fig 31. Tightening the tie rods

D 22310--4 en 0507 / MS 25 (32)

HL 710, HL 710S; Repair instructions

6.4. Percussion mechanism

Use a lot of oil inside surface of the body cylinder.

Check the chapter ”Seals” to make sure the seals are fitted correctly.
Check also that the components are not installed wrong way.

Lift the assembly plate to a vertical position with a hoist. Assemble the front cylinder into
the body cylinder. Assemble the rear bearing deep enough into the rear cylinder. Check
the edges. Assemble the distributor, rear cylinder assy. onto the shaft.
Lift the shaft assy. into the body cylinder. Use the same special tool as used for lifting the
percussion mechanism.

Fig 32. Percussion mechanism

6.5. Rear cover
Required tools:
-- Torque wrench
-- 30 mm socket
Install the rear cover and the bolts in the body cylinder. Before the installation, place the
O--ring in the groove of the rear cover. Use new lock washer pairs .The surfaces should
be clean and dry.

Fig 33. The rear cover

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 HL 710, HL 710S; Repair instructions

Tightening the rear cover bolts

Fig 34. Tightening the rear cover bolts

Tightening torques
-- pre--tightening torques 200 Nm (20 kpm)
-- final tightening torque 400 Nm (40 kpm)
-- use a cross--tightening order

6.6. Assembly of hydraulic motor

Carefully assemble the hydraulic motor

into the gear housing and tighten the bolts.
Required tools:
-- Torque wrench
-- 24 mm socket
Grease the bolts. Pre--tighten all four bolts,
with a torque wrench to 100 Nm (10 kpm).
Use a tightening order 1--2--3--4 .The final
tightening torque is 150 Nm (15 kpm). Use
the same tightening order 1--2--3--4.

Fig 35. Tightening of the hydraulic motor bolts

Use grease on hydraulic motor o--ring and pole.

D 22310--4 en 0507 / MS 27 (32)

HL 710, HL 710S; Repair instructions

6.7. Assembly of the pressure accumulators

Grease the O--ring and the bolts.

Install the pressure accumulators using a
rubber mallet. See Repair instructions
”Pressure Accumulators”.
Required tools:
-- Torque wrench
-- 24 mm socket
Pre--tighten all four bolts, with a torque
wrench to 100 Nm (10 kpm). Use a
tightening order 1--2--3--4.The final
tightening torque is 200 Nm (20 kpm). Use
the same tightening order 1--2--3--4.

Fig 36. Tightening the pressure accumulator bolts

The types and pressures of the accumulators

Type of accumulator Pressure [bar]
High pressure 80 (max)
Low pressure 4

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 HL 710, HL 710S; Repair instructions

6.8. Assembly of the front end

Fig 37. Assembly of the coupling piece , rotation bushing and the flushing housing. Use
new gasket (1). Flushing housing ssembly; See operation and maintenance

Tilt the mounting stand into horizontal

position using a suitable hoist. Secure the
stand on with a latch and locking screw.

Required tools:
-- 19 mm socket
-- torque wrench
Lubricate the bolt threads with grease. Use
new bonded seal. Tighten the bolt to 120
Nm (12 kpm).

Fig 38. Tightening the setscrew

Tightening of flushing housing bolts:

Required tools:
-- Torque wrench
-- 36 mm socket
Lubricate the bolt and nut threads with
grease.
Pre--tighten all four nuts to 300 Nm (30
kpm). Correct tightening order is 1--2--3--4.
Tighten the bolts up to 600 Nm (60 kpm).
Use the cross--tightening method. Use new
lockwashers
Fig 39. Tightening the flushing housing bolts

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HL 710, HL 710S; Repair instructions

Fig 40. Wear limits

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 HL 710, HL 710S; Repair instructions

7. WEAR LIMITS

PART NAME WEAR LIMIT

A. Bearings of the shank Must be changed, if the oil groove is worn

flush with the bearing surface in any place.
B. Gear housing Manufacturing 271 mm / Reject 270 mm
C. Front bearing of the gear housing Must be changed if the ”oil pockets” are worn
out on some places on the bearing
surface.
D. Rear bearing of the gear housing Must be changed if the oil groove is worn out
on some places on the bearing surface.
E. The shaft of the idler gear Must be changed if the shaft/bushing is worn
loose or the surface of the shaft is damaged.
F. Piston Must be changed if the bevel of the piston
head is worn out.
G. Chuck / Lock ring pair Must be changed if the pair depression is 1
mm / if there are cracks on the surface.
H. Coupling Must be changed when the teeth are worn
halfway.
K. Shank See Operation and Maintenance.
L. Spacer bearing The bearing must be replaced when the wear
indicator groove has worn down to the level of
the surface at any point.
M. Seal housing of the spacer Change the seal housing if the width of the
seal groove is more than 4,35 mm.
N. Rotation bushing Check the wearness of the bearing surfaces
and the rotation bushing teeth.

D 22310--4 en 0507 / MS 31 (32)

HL 710, HL 710S; Repair instructions

Checking the percussion cartridge fit between the spacer and the rear cover

Fig 41. Measuring points

Wash the percussion cartridge (1) parts. Before measuring and assembling check that
the parts are clean and without oil films.
Measure the dimensions (A), (B) and (C).
The difference of the measurements (A) and (B) must be larger than the measurement
(C). If it is not, discard the parts (3) and (4).

8. TEST RUN
Do the test--run for the Rock drill to check the ordinary functions.
Observe during the test:
-- that there is no oil leak at the front of the rock drill or at the connections between
the different components
-- operation of the shank lubrication
-- operation of the flushing
-- pressures and temperature

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 PRESSURE ACCUMULATOR FOR HYDRAULIC ROCK DRILL; Repair instructions

CONTENTS

1. GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2. CHECKING THE FILLING GAS PRESSURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
3. REMOVING THE PRESSURE ACCUMULATOR FROM THE ROCK DRILL . 3
4. DISMANTLING THE PRESSURE ACCUMULATOR . . . . . . . . . . . . . . . . . . . . . . 4
5. CHECKING THE PRESSURE ACCUMULATOR . . . . . . . . . . . . . . . . . . . . . . . . . 4
6. ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
7. FILLING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
7.1. Filling device of pressure accumulators . . . . . . . . . . . . . . . . . . . . . . . . 7
7.2. Filling instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
7.3. Filling pressures of accumulators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
7.3.1. Low pressure accumulator (LP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
7.3.2. High pressure accumulator (HP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
7.3.3. Pressure of stabilizer accumulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
8. MOUNTING THE PRESSURE ACCUMULATOR ON THE ROCK DRILL . . . . 11

D 28160--9 en 0507 / MS 1 (12)

PRESSURE ACCUMULATOR FOR HYDRAULIC ROCK DRILL; Repair instructions

1. GENERAL
As in all hydraulic machinery so also in hydraulic drill rigs cleanness is the most important
consideration if trouble--free operation is to be ensured. We therefore recommend that all
maintenance work of the accumulators is done in a clean and dustless room.
The condition of pressure accumulator should be checked always when the accumulator
is dismantled and when the rock drill is overhauled. The rock drill special tool set includes
all the tools needed in maintenance and checking the accumulators.
Experiences have shown that the first (originally fitted) accumulator diaphragm does not
reach the normal service life, particularly if the time interval between the pressurization
and taking into use is long. For this reason the accumulators supplied as spares are
unpressurized. There is a note of this on the accumulator.
The accumulator bottom and cover should always be kept as a pair. Sandvik supplies
covers and bottoms only as a pair; other parts such as diaphragms and filling valves can
be obtained separately.

Only qualified service personnel may service the pressure

accumulators. The following instructions must be strictly observed;
failure to do so may cause a danger of accident.
WARNING

Before removing the accumulator from the rock drill, discharge the
accumulator pressure by opening the filling valve.

WARNING

Repair of a pressure accumulator by welding or by other means is strictly

forbidden.

WARNING

While using the gauge, the pressure relief hole must always be pointed
to the opposite direction from any persons close by to avoid personal
injures in case the sudden pressure discharge.
WARNING

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 PRESSURE ACCUMULATOR FOR HYDRAULIC ROCK DRILL; Repair instructions

2. CHECKING THE FILLING GAS PRESSURE

Check the accumulator filling gas pressure once a week. The rock drill special tool set
includes two pressure gauges for this purpose: one gauge with the scale 0...100 bar for
the high pressure accumulator, and the other with the scale 0...10 bar for the low pressure
accumulator.

a b

1. Remove the cap (a).

2. Screw the pressure gauge to the filling valve.
3. Undo the lock nut (b).
4. Wait until the needle of the gauge stops and then read the gauge indication.
5. Close the lock nut (b).
6. Unscrew the gauge from the filling valve and fit the cap (a) in place.

3. REMOVING THE PRESSURE ACCUMULATOR FROM THE ROCK

DRILL
Pressure accumulator can be changed without demounting the rock drill from the feed.
If you for some reason cannot immediately install a new accumulator, must the open oil
channels be covered thoroughly with eg. plastic plugs.

1. Discharge the accumulator pressure by opening the filling valve!

2. Undo the accumulator bolts (wrench size 24 mm).

Do not start the hydraulic power pack if an accumulator is not in place in

the rock drill.

WARNING

D 28160--9 en 0507 / MS 3 (12)

PRESSURE ACCUMULATOR FOR HYDRAULIC ROCK DRILL; Repair instructions

4. DISMANTLING THE PRESSURE ACCUMULATOR

WARNING

1. Fasten the assembly stand (1) in the vice, and place the accumulator in the stand
with the bottom upwards.
2. The same number appears both on the accumulators cover as well as on the
bottom. The cover and the bottom must remain paired.
3. Make sure that the filling valve is open!
4. Open the accumulator bottom with the opener (2).

5. CHECKING THE PRESSURE ACCUMULATOR

1. Check the accumulator visually for wear, damage, corrosion, etc.

2. Clean and check the threads carefully.

If the threads are badly corroded or worn, the accumulator must be

scrapped!

WARNING

4 (12) D 28160--9 en 0507 / MS

 PRESSURE ACCUMULATOR FOR HYDRAULIC ROCK DRILL; Repair instructions

6. ASSEMBLY

b
10 Nm
40 Nm secure with glue
20 Nm
b

1. Fit a new or inspected diaphragm in the cover. Make sure that the diaphragm is
in the groove and fitted the right way down.
2. Lubricate the surface (a) with vaseline or lanolin.

D 28160--9 en 0507 / MS 5 (12)

PRESSURE ACCUMULATOR FOR HYDRAULIC ROCK DRILL; Repair instructions

Check that the number on the cover and the bottom is the same.

WARNING

D The high pressure accumulator is marked with uneven numbers and the low
pressure accumulator with even numbers.

HP LP

3. Lubricate the threads of the bottom with vaseline or lanolin.

4. Screw the bottom all the way in and tighten it with the special tool to a torque of
150 Nm.
D When the pressure accumulator diaphragm is changed, the O--rings (b) should
also be changed.

Check the wear limit marks of the threads always after tightening (150 Nm) of the bottom.
If the mark (I) in the bottom remains after the tightening between the dot S) and the mark
(R) in the cover, the thread is in order.
If the mark (I) in the bottom goes beyond the mark (R), are the threads of the accumulator
cover and bottom too much worn. Replace the accumulator and discard the old one.
A worn-- out or damaged pressure accumulator must be discarded
immediately.

WARNING

6 (12) D 28160--9 en 0507 / MS

 PRESSURE ACCUMULATOR FOR HYDRAULIC ROCK DRILL; Repair instructions

7. FILLING
The only allowable filling gas is nitrogen (N2).

WARNING

Do not fill an unchecked or a too worn accumulator.

WARNING

D You can refill the accumulator while mounted to the rock drill.

7.1. Pressure accumulator filling device

12 9 8 7 6 5 3 2

N2
11 10 13,14 15 4 1

1. Accumulator body
2. Filling valve
3. Locking nut
4. Cap
5. Quick coupling stem
6. Quick coupling sleeve
7. Hose
8. Accumulator pressure gauge
9. Gas bottle pressure gauge
10. Pressure reducing valve
11. Pressure regulating valve
12. Shut--off valve
13. Adapter
14. Seal
15. Elbow adapter

D 28160--9 en 0507 / MS 7 (12)

PRESSURE ACCUMULATOR FOR HYDRAULIC ROCK DRILL; Repair instructions

7.2. Filling instruction

1. Remove the cap (4).

2. Screw the elbow adapter (15) to the filling valve (2).
3. Push the quick coupling sleeve (6) onto the stem (5).
4. Undo the locking nut (3).
5. Turn the pressure regulating valve (11) open.
6. Open the nitrogen bottle valve (12). The gauge (9) indicates the pressure in the
bottle.
7. Adjust the pressure in the low pressure accumulator to 5 -- 10 bar by turning the
regulating valve (11). Gauge (8) indicates the pressure in the accumulator.
8. Adjust the pressure in the H.P. accumulator with the pressure control valve (11),
according to the instructions. Gauge (8) indicates the pressure in the accumulator.
Max. pressure is marked on the accumulator.
9. Adjust the pressure of the stabilizer accumulator with the pressure control valve,
according to the instructions. Gauge (8) indicates the pressure in the accumulator.
10. Close the filling valve (2) by turning the locking nut (3).
11. Close the nitrogen bottle valve (12).
12. Turn the pressure regulating valve (11) open.
13. Disconnect the quick couplings (5) and (6).
14. Release the elbow adapter (15) from the filling valve (2).
15. Mount the checking gauge (0--10 bar) in to the low pressure accumulator filling
valve (2) and by opening the locking nut (3) let the pressure flow out until the gauge
shows 3 - 5 bar.
16. Tighten the locking nut (3) to 20 Nm.
17. Refit the cap (4).
18. Assure the tightness of the accumulator by immersing it in water. Dry the
accumulator carefully for example with compressed air.
19. If the accumulator is not taken into use directly, release the pressure and store it
in a dry place protected from dirt.

8 (12) D 28160--9 en 0507 / MS

 PRESSURE ACCUMULATOR FOR HYDRAULIC ROCK DRILL; Repair instructions

7.3. Filling pressures of accumulators

7.3.1. Low pressure accumulator (LP)

Low pressure accumulator damps hydraulic vibrations in the return line. It also prevents
cavitation in return lines and channels. To get the optimum result of LP--accumulator, gas
pressure should be half of the return line pressure. Normally it is from 3 to 5 bars.

7.3.2. High pressure accumulator (HP)

The main function of high pressure accumulator is to store pressurised oil during the
return stroke of the piston. This stored pressure can be utilized during the next piston
stroke. Another vital function is to dampen vibrations. HP--accumulator gas pressure
should be related to the set max. percussion pressure according to graph below.

Stem--type diaphragm

100

90

80

70
Filling pressure

60

50

40

30

20

10

0
100 120 140 160 180 200 220
Percussion pressure
Upper limit
Lower limit

D 28160--9 en 0507 / MS 9 (12)

PRESSURE ACCUMULATOR FOR HYDRAULIC ROCK DRILL; Repair instructions

Normal (stemless) diaphragm

100

90

80
Filling pressure

70

60

50

40

30

20

10

0
100 120 140 160 180 200 220

Upper limit Percussion pressure

Lower limit

7.3.3. Pressure of stabilizer accumulator

HLX5 T . . . . . . . . . . 8 bar
HFX5 T . . . . . . . . . . 8 bar
HLX5 LT . . . . . . . . 30 bar
HL 800 T . . . . . . . . . 30 bar
HL 1500 . . . . . . . . . 50 bar
HL 1560 T . . . . . . . 40 bar

10 (12) D 28160--9 en 0507 / MS

 PRESSURE ACCUMULATOR FOR HYDRAULIC ROCK DRILL; Repair instructions

8. MOUNTING THE PRESSURE ACCUMULATOR ON THE ROCK

DRILL

D See “Hydraulic rock drill, repair instructions“.

1. Before mounting the accumulator on the rock drill, remove the cover plugs from
the accumulator connection port, and clean the joint surfaces both in the
accumulator and in the rock drill.
2. Check that the bolts move easily in their threads in the drill body. Lubricate the
threads of the bolts.
3. Fit the O--ring and the gasket.
4. Tighten the pressure accumulator bolts in two phases:
pretightening 100 Nm, final tightening 200 Nm.

1 2

4 3

Tightening of the four--bolt accumulator

The four-- bolt accumulator must be tighten by using a cross--tightening

method 1--3-- 2--4.
CAUTION

D 28160--9 en 0507 / MS 11 (12)

PRESSURE ACCUMULATOR FOR HYDRAULIC ROCK DRILL; Repair instructions

Notes:

12 (12) D 28160--9 en 0507 / MS

 Hydraulic motors OMSU, OMT and MTA; Repair instructions

CONTENTS

1. REPAIR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1. Checking the motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.2. Timing the motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.3. OMSU hydraulic motors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.3.1. Assembling the motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.3.2. Installing the bearings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.4. OMT hydraulic motors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.4.1. Fastening the gear wheel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.5. MTA hydraulic motors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

D 28400--4 en 0507 / MS 1 (8)

Hydraulic motors OMSU, OMT and MTA; Repair instructions

1. REPAIR

In order to ensure uninterrupted use, cleanliness must be considered in all maintenance

and repair procedures related to hydraulic equipment. We recommend that all
maintenance and repair procedures for hydraulic motors be performed in a clean and
dust--free room.
When disassembling a hydraulic motor, always replace all seals and O--rings.

1.1. Checking the motor

2 1
5 to 10 Nm

Non--return valve
Check the condition of the ball (1) and the valve surfaces (2). If they are damaged, the
valve will leak and the motor must be replaced.

Gear wheel set

If the parts have cracks or indications of motor jamming, or if the gear wheel set is worn
out, the motor should be replaced. Retain and install the outer and inner ring of the same
gear wheel set as a pair.

2 (8) D 28400--4 en 0507 / MS

 Hydraulic motors OMSU, OMT and MTA; Repair instructions

1.2. Timing the motor

Place the valve plate (1) on top of the balance plate, and mark (with chalk or ink) the drive
spline, which lines up with the hole (A) on the outer rim of the valve.
Mark the bottom of the valve drive shaft spline. Place the valve drive shaft such that the
marked spline bottom is aligned with the marked spline on the valve and the end with the
widest splines (5 mm) is mounted in the valve. Push the channel plate into place.
Mark the inner rotor with the spline bottom that acts against the bottom of the outer splines.
Mount the gear wheel set, and align the rotor (3) such that the mark is aligned with the
bottom of the marked spline of the valve drive shaft. Turn the rotor anticlockwise until the
splines engage with the splines on the drive shaft splines.

D 28400--4 en 0507 / MS 3 (8)

Hydraulic motors OMSU, OMT and MTA; Repair instructions

1.3. OMSU hydraulic motors

3 Nm
2 3 3 Nm
4
5
3
6
7
8 6

9
10
11
12 13
14 15 16 17 18
19
20 21
22 23 24

5 to 10 Nm 80 Nm

The motor seal set includes parts 2, 6, 14, and 15. Refer to the spare parts manual.

Never rotate the motor without a shaft, as this could damage the plate.

4 (8) D 28400--4 en 0507 / MS

 Hydraulic motors OMSU, OMT and MTA; Repair instructions

1.3.1. Assembling the motor

3 Nm
1 4

Carefully press the cover (2) into place. Make sure that the clearance
between the cover and the frame is equal on all sides before you tighten
the bolts (1). Otherwise the shaft (4) can be behind the corner (3) and the
bearing (5) will break the rear cover when the bolts are tightened.
1.3.2. Installing the bearings

33
34
35
21
35
19

Install the bearings (35) and the bushing (21) on the shaft (19) as shown in the figure.
Tighten the nut (33) with a special tool (tightening torque: 25 Nm), and bend the edges
of the locking plate (34) on top of the nut (33).

D 28400--4 en 0507 / MS 5 (8)

Hydraulic motors OMSU, OMT and MTA; Repair instructions

1.4. OMT hydraulic motors

100 Nm
Secure with glue

2
2
3
24 Nm
Secure with glue

4
5

5
60 Nm
Secure with glue
and point pin

6
7

190 Nm

The motor seal set includes parts 1 through 7. Refer to the spare parts manual.

6 (8) D 28400--4 en 0507 / MS

 Hydraulic motors OMSU, OMT and MTA; Repair instructions

1.4.1. Fastening the gear wheel

Two different gear wheels are used on the OMT hydraulic motors. Depending on the gear
wheel type, you must use sealing bushings (A) of different length (37 mm or 32 mm); refer
to the figure.
Old gear wheel

37 mm

New gear wheel

100 Nm; secure with glue
(Loctite 270)

24 Nm; secure with glue

(Loctite 270) 190 Nm

Pressed--on fit
preheat max.: 150 C;
seal with glue (Loctite 250)
60 Nm; secure with
32 mm glue and point pin

D 28400--4 en 0507 / MS 7 (8)

Hydraulic motors OMSU, OMT and MTA; Repair instructions

1.5. MTA hydraulic motors

160 Nm
Secure with glue
5,8
2
11
10
6
9
3
9
12
24 Nm
Secure with glue 13
14

14
15
19
20
7

60 Nm
20
Secure with glue
and point pin

21
22

18

190 Nm

The motor seal set includes parts 9, 11, 12, and 19 through 22. Refer to the spare parts
manual.

8 (8) D 28400--4 en 0507 / MS

 POWER EXTRACTOR HL 650/710/800T/1010/1560T PE

POWER EXTRACTOR HL 650/710/800T/1010/1560T PE

Operation, maintenance and repair

C 28510--8 en 0507/LH 1 (42)

POWER EXTRACTOR HL 650/710/800T/1010/1560T PE

CONTENTS

1. DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2. GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3. OPERATION PRINCIPLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4. USE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
5. HOSE CONNECTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
5.1. Hose connections HL 650/710/800T PE, HL 650/710/800T SPE . . . . 6
5.2. Hose connections HL 1010 PE, HL 1010 SPE . . . . . . . . . . . . . . . . . . . . 6
5.3. Hose connections HL 1560T PE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
5.4. Hose connections HL 1560T SPE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
6. REMOVING AND INSTALLING THE POWER EXTRACTOR WHILE
THE ROCK DRILL IS MOUNTED ON THE FEED . . . . . . . . . . . . . . . . . . . . . . . . 8
6.1. Removing the Power Extractor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
6.2. Installing the Power Extractor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
7. CROSS SECTION OF THE POWER EXTRACTOR, LUBRICATION
CIRCULATION AND THE MOUNTING DIRECTION OF THE SHANK SEALS 13
7.1. Cross section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
7.2. Lubrication circulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
7.3. Installation direction of the shank and shank bushing seals . . . . . . 15
7.3.1. Water flushing, air / water mist flushing (underground) . . . . . . . . . . . . 15
7.3.2. Air flushing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
8. DISMANTLING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
8.1. Removing the front cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
8.2. Changing the shank bearing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
8.3. Removing the seal housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
8.4. Removing the adapter flange . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
8.5. Removing the pin and piston housing . . . . . . . . . . . . . . . . . . . . . . . . . . 20
8.6. Removing and installing of the space bushing . . . . . . . . . . . . . . . . . . 23
8.7. Dismantling of the adapter flange . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

2 (42) C 28510--8 en 0507/LH

 POWER EXTRACTOR HL 650/710/800T/1010/1560T PE

9. ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
9.1. Assembly of the adapter flange . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
9.1.1. Installing the seals into the adapter flange WATER FLUSHING . . . . . 29
9.1.2. Installing the seals into the adapter flange AIR FLUSHING . . . . . . . . 29
9.2. Installing the pin housing seals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
9.3. Installing and calibration of the piston seals . . . . . . . . . . . . . . . . . . . . 31
9.4. Assembling the piston housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
9.5. Installing the shank bushing, pin housing and the piston housing 32
9.6. Installing the seal housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
9.7. Mounting the front cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
10. SPECIAL TOOLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
10.1. Special tool kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
10.2. Shank installation tool . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

C 28510--8 en 0507/LH 3 (42)

POWER EXTRACTOR HL 650/710/800T/1010/1560T PE

1. DESCRIPTION
The power extractor is a module for a hydraulic rock drill. It is needed when the drill string
is jammed so tight that it can not be removed by using the feed, rotation and percussion.
The power extractor is operated by a switch on the operators control panel. This switch
activates the add--on control valve allowing for oil to flow to the PE and rock drill with
reduced percussion pressure. It can be used with air (PE) and water/water--air mist (SPE)
flushing (underground).

7
HL 650/710/800T PE--52
HL 650/710/800T SPE--52

HL 1010 PE--65 HL 1010 PE--90

HL 1010 SPE--90

HL 1560T PE--65 HL 1560T PE--90

HL 1560T SPE--90

4 (42) C 28510--8 en 0507/LH

 POWER EXTRACTOR HL 650/710/800T/1010/1560T PE

2. GENERAL
These instructions will describe shortly the most important maintenance tasks of Power
Extractor. The service facilities should fulfil the same criteria as the service facilities for
rock drill.
The drawings used on this instruction are from HL 1560T PE and are similar with other
PE and SPE. The item numbers will follow the ones used on spare parts pages.
The Power Extractor should be disassembled and its components checked during regular
maintenance every 500 operating hours.
Check the Power Extractor drain holes daily during drilling. If air, oil mist, water, or oil is
coming out of the drain holes, some of the shank seals have been damaged. Change the
damaged seals immediately.
Check the condition of the shank bearing when changing the shank. Change the bearing
and the shank seals, when the bearing wear limit is exceeded. Under difficult conditions,
for example during underground drilling, check the bearing once a week even if the shank
is not changed.
Sandvik Mining and Construction Corp. is always ready to help and give advice in all
maintenance problems. The qualified Sandvik maintenance personnel of your Sandvik
dealer and original Sandvik spare parts ensure reliable operation of your drilling
equipment.

3. OPERATION PRINCIPLE
During the normal drilling, Power Extractor has tank pressure. The shank bushing is in
front position so that the shank will not touch it. By pressurizing the Power Extractor the
shank bushing will push the shank towards the rock drill piston and piston is able to strike
the shank.

4. USE
Power Extractor is needed when the drill string is jammed so tight that it can not be
removed by using the feed, rotation and percussion. With Power Extractor about 30--40%
of the percussion power will move into the drill string to make the loosening easier. Power
Extractor is operated by the switch in the cabin. The most important step to loose the drill
string is to get the rods turning.
Loosening the drill string: Switch off the antijamming automatics. Switch on the Power
Extractor, rotation to thread tightening direction, reverse feed and percussion; do not keep
the Power Extractor on longer than 10 sec. Changing the feed direction will help and get
the rods loose faster. Switch off the Power Extractor pressure when feeding forwards. The
recommended maximum time to use the Power Extractor is 5 min! The longer time will
heat up the oils and wear out the rock drill and the drill string.

C 28510--8 en 0507/LH 5 (42)

POWER EXTRACTOR HL 650/710/800T/1010/1560T PE

5. HOSE CONNECTIONS
5.1. Hose connections HL 650/710/800T PE, HL 650/710/800T SPE
3 2 Shank lubrication inlet
1

4
5 6 Rotation leakage

1. Flushing
2. (S) Shank lubrication
3. (P) Pressure
4. (T) Tank (leakage)
5. (R) Shank lubrication return
6. (B) Shank bushing pressure (S--model)

5.2. Hose connections HL 1010 PE, HL 1010 SPE

2 6 Shank lubrication inlet
4

3
Rotation leakage
5
1. Flushing
2. (S) Shank lubrication
3. (P) Pressure
4. (T) Tank (leakage)
5. (R) Shank lubrication return
6. (B) Shank bushing pressure (S--model)

6 (42) C 28510--8 en 0507/LH

 POWER EXTRACTOR HL 650/710/800T/1010/1560T PE

5.3. Hose connections HL 1560T PE

2 Shank lubrication inlet
4
Rotation leakage
1

3
5

1. Flushing
2. (S) Shank lubrication
3. (P) Pressure
4. (T) Tank (leakage)
5. (R) Shank lubrication return

5.4. Hose connections HL 1560T SPE

2 Shank lubrication inlet
4

Rotation leakage
5
6

1. Flushing
2. (S) Shank lubrication
3. (P) Pressure
4. (T) Tank (leakage)
5. (R) Shank lubrication return
6. (B) Shank bushing pressure (S--model)

C 28510--8 en 0507/LH 7 (42)

POWER EXTRACTOR HL 650/710/800T/1010/1560T PE

6. REMOVING AND INSTALLING THE POWER EXTRACTOR

WHILE THE ROCK DRILL IS MOUNTED ON THE FEED

If the shank lubrication line is blocked (no air is coming out from the
shank lubrication return line), open the locking screw carefully and let
the air pressure escape out before opening the Power Extractor
WARNING mounting bolts. By failing to do this the air pressure inside the Power
Extractor might accidentally force the Power Extractor out and cause
serious injuries.

6.1. Removing the Power Extractor

Remove the Power Extractor hoses. Plug and cap the hose ends and adapters.
1. Install the shank installation tool (1) to the front end of the feed rail:
-- bolt the wear piece (3a) on the tool
-- put the tool on the rail
-- install the wear piece (3b)
-- tighten the installation tool on the rail be by bolts (5)
2. Remove the bolts (21)
-- on HL 1560T PE and HL 650/710/800T PE loosen the upper bolt (21a) but leave
it on
-- on HL 1010 PE remove the bolts (22), loosen the right hand bolt (21b) but leave
it on
3. Drive the rock drill on the pins (6) of the installation tool.

8 (42) C 28510--8 en 0507/LH

 POWER EXTRACTOR HL 650/710/800T/1010/1560T PE

21 (HL 1010 PE) 22

21 (HL 1560T PE
HL 650/710/800T PE)

2 6

22
21a
21b

1
21 (HL 1560T PE
HL 650/710/800T PE)

3a 3b

C 28510--8 en 0507/LH 9 (42)

POWER EXTRACTOR HL 650/710/800T/1010/1560T PE

1
21a (HL 1560T PE
HL 650/710/800T PE)
2

21b (HL 1010 PE)

4. Fasten the shank installation tool (1) on by bolts (2) and remove the bolt (21a) /
(21b).

5. Back up the rock drill to remove the Power Extractor. Remove the shank (3). Be
careful not to drop down the coupling (4).
6. Open the bolt (6) and remove the rotation bushing (5).

10 (42) C 28510--8 en 0507/LH

 POWER EXTRACTOR HL 650/710/800T/1010/1560T PE

7. Check the condition of the following rock drill parts (see the wear limits on the rock
drill repair manual):
-- rotation bushing
-- chuck
-- coupling
-- shank
8. Check the condition of the following Power Extractor parts (see the wear limits later
on this instruction):
-- shank bushing
-- shank bearing
-- flushing housing seals
-- shank lubrication seals
In case the Power Extractor has to be removed from the feed:
-- install the two lifting eyes (10) to the adapter flange
-- remove the two bolts (2)
-- lift the Power Extractor off from the shank installation tool
-- installing the Power Extractor back to the feed is done in reverse order

3
10
2
6

5
10

C 28510--8 en 0507/LH 11 (42)

POWER EXTRACTOR HL 650/710/800T/1010/1560T PE

6.2. Installing the Power Extractor

1. Install rotation bushing, coupling and shank. Tighten the locking screw (6).

21 (HL 1010 PE)

21 (HL 1560T PE
HL 650/710/800T PE)

21 (HL 1560T PE
HL 650/710/800T PE)

2. Drive the rock drill into the Power Extractor, fasten the bolts (21) and remove the
bolts (2).

22

21

22

21
1

3. Move the rock drill back wards to remove the shank installation tool (1) from the
Power Extractor.
4. Install the rest of the bolts (21) (HL 1010 PE bolts (22), for tightening refer the
maintenance instructions for rock drill).
5. Remove the shank installation tool (1) from the feed rail.

12 (42) C 28510--8 en 0507/LH

 POWER EXTRACTOR HL 650/710/800T/1010/1560T PE

7. CROSS SECTION OF THE POWER EXTRACTOR, LUBRICATION

CIRCULATION AND THE MOUNTING DIRECTION OF THE
SHANK SEALS

7.1. Cross section

A B

(A) and (B) are leakage holes. If there is air, air--oil mist or oil coming through the holes,
one of the shank seals is broken.

C 28510--8 en 0507/LH 13 (42)

POWER EXTRACTOR HL 650/710/800T/1010/1560T PE

7.2. Lubrication circulation

14 (42) C 28510--8 en 0507/LH

 POWER EXTRACTOR HL 650/710/800T/1010/1560T PE

7.3. Installation direction of the shank and shank bushing seals

7.3.1. Water flushing, air / water mist flushing (underground)

7.3.2. Air flushing

NOTE! Do not install seal (73) to air flushing rock drill.

73

C 28510--8 en 0507/LH 15 (42)

POWER EXTRACTOR HL 650/710/800T/1010/1560T PE

8. DISMANTLING
8.1. Removing the front cover
Remove the front cover (10) by opening the bolts (22).

10

22

8.2. Changing the shank bearing

The bearings must be changed if the wear indication--groove has

worn out from any area.

16 (42) C 28510--8 en 0507/LH

 POWER EXTRACTOR HL 650/710/800T/1010/1560T PE

Change the bearing by using a hydraulic press and a special tool (1).

C 28510--8 en 0507/LH 17 (42)

POWER EXTRACTOR HL 650/710/800T/1010/1560T PE

8.3. Removing the seal housing

Using the edge of the seal housing push the housing (5) out. Remove the flange (28).

28

18 (42) C 28510--8 en 0507/LH

 POWER EXTRACTOR HL 650/710/800T/1010/1560T PE

8.4. Removing the adapter flange

Open the fastening bolts (24), 4 pcs, of the adapter flange.

24

Mark the ends of the pins (9) with a marking pen to make sure you install them back
marked ends towards shank bushing.

C 28510--8 en 0507/LH 19 (42)

POWER EXTRACTOR HL 650/710/800T/1010/1560T PE

8.5. Removing the pin and piston housing

Push the pin housing (4) and the piston housing (6) out together.

6
4

20 (42) C 28510--8 en 0507/LH

 POWER EXTRACTOR HL 650/710/800T/1010/1560T PE

Remove the pin housing from the piston housing and remove the studs from the housing.
Do not remove the guide pins (70).

70

Check the wear of the stud holes and the end surfaces. Change the stud housing if any
of the wear indicators is worn out.

C 28510--8 en 0507/LH 21 (42)

POWER EXTRACTOR HL 650/710/800T/1010/1560T PE

Remove the pistons by blowing carefully air through the outer ring holes (A).
Check the piston holes for scratches, especially at the area of seals. Change the housing
if required.

Check the condition of the pistons and change them with a new one if:
-- wear indicator groove E is worn out
-- the piston has cracks or burning marks

22 (42) C 28510--8 en 0507/LH

 POWER EXTRACTOR HL 650/710/800T/1010/1560T PE

8.6. Removing and installing of the space bushing

Remove the space bushing (100) by using a hydraulic press and a special tools (4) and
(11).

11

100

C 28510--8 en 0507/LH 23 (42)

POWER EXTRACTOR HL 650/710/800T/1010/1560T PE

Install O--rings (128) to space bushing.

Install the space bushing into housing by using a hydraulic press and a special tools (4)
and (11).

128

11

24 (42) C 28510--8 en 0507/LH

 POWER EXTRACTOR HL 650/710/800T/1010/1560T PE

8.7. Dismantling of the adapter flange

Push the shank bushing (3) out from the adapter flange.

Change shank bushing after every 500 percussion hours. Check the condition of the wear
indicator grooves. Change the shank bushing if it has hair cracks or the wear indicator
groove is worn out.

C 28510--8 en 0507/LH 25 (42)

POWER EXTRACTOR HL 650/710/800T/1010/1560T PE

Check the condition of the adapter flange bearings. The bearings must be changed by
using a hydraulic press and a special tool, if the wear indication--groove has worn out from
any area (1) or the bearings have some other damages.

111

110

Change the bearings (110) and (111) by using a hydraulic press and a special tools (2),
(3) and (6).

2 6

26 (42) C 28510--8 en 0507/LH

 POWER EXTRACTOR HL 650/710/800T/1010/1560T PE

3 6

C 28510--8 en 0507/LH 27 (42)

POWER EXTRACTOR HL 650/710/800T/1010/1560T PE

9. ASSEMBLY
Before assembly:
-- remove all old O--rings and seals
-- clean all the parts
-- lubricate all parts carefully!

9.1. Assembly of the adapter flange

Install the bearings (110) and (111) by using a hydraulic press and a special tools (4), (5)
and (6). Make sure the chamfer of the bearing (111) will face the tool (4)!

4
6

111

110

28 (42) C 28510--8 en 0507/LH

 POWER EXTRACTOR HL 650/710/800T/1010/1560T PE

9.1.1. Installing the seals into the adapter flange WATER FLUSHING
Install the O--rings (15 and 27) and seals (12) and (73) into the adapter flange.

15
27

73

12

9.1.2. Installing the seals into the adapter flange AIR FLUSHING
Install the O--rings (15 and 27) and seal (12) into the adapter flange. NOTE! Do not install
seal (73) to air flushing rock drill.

15
27

73

12

C 28510--8 en 0507/LH 29 (42)

POWER EXTRACTOR HL 650/710/800T/1010/1560T PE

9.2. Installing the pin housing seals

Install the O--rings (15) and the seals (13) and (14) into the stud housing (4). Make sure
when using a water and air / water mist flushing as shown in figure 1. and with air
flushing to install the seal (14) as shown in figure 2.

13

15
1

14

4
13

15
2

14

30 (42) C 28510--8 en 0507/LH

 POWER EXTRACTOR HL 650/710/800T/1010/1560T PE

9.3. Installing and calibration of the piston seals

Install the piston end (1) inside the special tool (7). Install the O--ring (3) into the O--ring
groove by pushing it over the tool (7). Install the seal (6) into the seal groove by pushing
it over the tool (7) using the tool (8). Remove the tools (7) and (8). Lubricate the calibration
tool (9) and push the piston (1) through the tool to calibrate the seal (6). This will ensure
the correct measurement of the seal (6).

3 6
8 9
1 7

9.4. Assembling the piston housing

Lubricate the parts. Push the pistons through the calibration tool (9) to avoid the piston
seal damages.

C 28510--8 en 0507/LH 31 (42)

POWER EXTRACTOR HL 650/710/800T/1010/1560T PE

Install the seals (18) into the piston housing (6).

18

9.5. Installing the shank bushing, pin housing and the piston
housing
Stand the shank bushing on upright position. Lubricate the seal (13) and surface A. Push
the pin housing into the shank bushing.

13

32 (42) C 28510--8 en 0507/LH

 POWER EXTRACTOR HL 650/710/800T/1010/1560T PE

Install the pins the same way as they originally were before dismantling (the ends marked
with the marking pen pointing down wards).

Install the piston housing on the pin housing.

C 28510--8 en 0507/LH 33 (42)

POWER EXTRACTOR HL 650/710/800T/1010/1560T PE

Install the shank bushing, the piston housing and the pin housing into the adapter flange.
Make sure the flat locking portion (A) stays at the front as shown in the picture.

34 (42) C 28510--8 en 0507/LH

 POWER EXTRACTOR HL 650/710/800T/1010/1560T PE

On the body add some glue on the corners of O--ring groove and install O--rings (54), (56)
and (57).
56

57

54

Lubricate the parts carefully. Install the bolts (21) through the adapter flange to guide the
body. Lower the body on the adapter flange and tap it down with a mallet. Do not use
hydraulic press!

21

21

C 28510--8 en 0507/LH 35 (42)

POWER EXTRACTOR HL 650/710/800T/1010/1560T PE

Install the adapter flange tightening bolts (24) 4 pcs.

1. Retighten all four bolts up to 100 Nm (10 kpm). Use tightening order 1--2--3--4.
2. The final tightening torque is 150 Nm (15 kpm). Use the same tightening order
1--2--3--4.
24

1
3

4
2

9.6. Installing the seal housing

Install the seals (14) and O--rings (19), (20) and (58) into the seal housing.
19 58 20

14 14

36 (42) C 28510--8 en 0507/LH

 POWER EXTRACTOR HL 650/710/800T/1010/1560T PE

Push the seal housing (5) in. Ensure the flat locking portion comes to the top.

Install the O--ring (61), seal (29) and adapter flange (28). Retighten the bolts up to 100
Nm (10 kpm). The final tightening torque is 150 Nm (15 kpm).

28

29

61

C 28510--8 en 0507/LH 37 (42)

POWER EXTRACTOR HL 650/710/800T/1010/1560T PE

9.7. Mounting the front cover

Install the seals (14) and O--rings (19) into the front cover. Note installation direction
of the seals.
1 Water and air/water mist flushing
2 Air flushing
19

14 14

1 2

38 (42) C 28510--8 en 0507/LH

 POWER EXTRACTOR HL 650/710/800T/1010/1560T PE

Install the seal (11) and fasten the front cover with bolts (22). Retighten the bolts up to 100
Nm (10 kpm). The final tightening torque is 200 Nm (20 kpm). Use cross--tightening
method.

11

10

22

C 28510--8 en 0507/LH 39 (42)

POWER EXTRACTOR HL 650/710/800T/1010/1560T PE

10. SPECIAL TOOLS

10.1. Special tool kit

HL 650 PE--52
HL 1010 PE--65 HL 1010 PE--90
NO Ø HL 710 PE--52
HL 1560T PE--65 HL 1560T PE--90
HL 800T PE-- 52

52 150 175 88

1. 65 550 056 19

90 550 151 15

135 550 149 04 550 149 04

2
2.

160 550 151 16

90 550 150 68

3. 110 550 150 65

120 550 151 17

90 550 150 67

4. 110 550 150 66

120 550 151 18

135 550 150 64 550 150 64

5
5.

160 550 151 19

40 (42) C 28510--8 en 0507/LH

 POWER EXTRACTOR HL 650/710/800T/1010/1560T PE

HL 650 PE--52
HL 1010 PE--65 HL 1010 PE--90
NO Ø HL 710 PE--52
HL 1560T PE--65 HL 1560T PE--90
HL 800T PE-- 52

6. 151 738 08 151 738 08 151 738 08

7. 150 678 08 150 678 08 150 678 08

8. 150 680 98 150 680 98 150 680 98

9. 150 679 28 150 679 28 150 679 28

10. 449 697 70 449 697 70 449 697 70

11. 550 663 27 550 663 27 550 444 34

HL 650 PE--52
HL 1010 PE--65 HL 1010 PE--90
HL 710 PE--52
HL 1560T PE--65 HL 1560T PE--90
HL 800T PE-- 52

SPECIAL TOOL KIT 550 151 20 550 151 21 550 151 23

NOTE! Special tool kit does not include shank installation tool

C 28510--8 en 0507/LH 41 (42)

POWER EXTRACTOR HL 650/710/800T/1010/1560T PE

10.2. Shank installation tool

SHANK INSTALLATION
POWER EXTRACTOR FEED
TOOL

HL 650 PE
CF 145
HL 710 PE 550 147 89
DX
HL 800T PE
HL 650 PE LF 1500
HL 710 PE DP 550 020 41
HL 800T PE DL
LF 1500
HL 1010 PE
DP 550 080 42
HL 1560T PE
DL

42 (42) C 28510--8 en 0507/LH