C 33500 – 3 en 0101 / PIR 1 (25)

CYLINDER FEED LF 1514

Maintenance and repair instructions

E 2001 SANDVIK TAMROCK CORP., Tampere Plant,

P.O.Box 100
FIN–33311 TAMPERE, Finland
Tel. +358 205 44 121, Telex 22335 parts fi
Telefax +358 205 44 4771
 2 (25) C 33500 – 3 en 0101 / PIR

CYLINDER FEED LF 1514

Maintenance and repair instructions

CONTENTS

1. GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2. SAFETY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
3. TECHNICAL DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
4. LIFTING POINTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
5. MAIN COMPONENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
6. OPERATING PRINCIPLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
6.1 Adjusting feed cylinder overcenter valve (248) and sequence
valve (249) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
6.2 Approach stop device (safety wire) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
6.3 Adjusting of the approach stop device (safety wire) . . . . . . . . . . . . . . . . . 8
7. CHECKING, SERVICING, ADJUSTING, AND REPLACING WIRE ROPES . . 9
7.1 Checking and servicing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
7.2 Adjusting wire ropes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
7.3 Replacing wire ropes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
8. FEED RAIL AND CARRIAGE SLIDE PIECES . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
8.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
8.2 Adjusting slide piece clearances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
19. REPLACING RETURN WHEEL BEARINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
10. FEED CYLINDER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
10.1 Removing the feed cylinder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
10.2 Cylinder structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
10.3 Replacing seals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
10.4 Installing the feed cylinder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
10.5 Bleeding the feed cylinder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
11. PITO 15 H – RETAINER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
11.1 Replacing jaw pieces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
11.2 Retainer maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
11.3 Retainer alignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

E 2001 SANDVIK TAMROCK CORP., Tampere Plant,

P.O.Box 100
FIN–33311 TAMPERE, Finland
Tel. +358 205 44 121, Telex 22335 parts fi
Telefax +358 205 44 4771
 C 33500 – 3 en 0101 / PIR 3 (25)

CYLINDER FEED LF 1514

Maintenance and repair instructions

1. GENERAL

The LF 1514 feeds are designed for the HL 700, HL 1000 and HL 1500 rock drills.
The engineering of the feed aims at simple structure and easy maintenance. The main
components and the operating principle of the feed are presented later in these
instructions.
These instructions also describe the usual maintenance procedures of the cylinder feed.
Tamrock Service is always ready to offer advice and help in all service problems. The
trained maintenance personnel of your Tamrock Dealer use the proper tools and modern
measuring instruments, and they install original Tamrock spare parts when necessary.

2. SAFETY

Do not use the cylinder feed until you have received proper training. Read
the operating instructions before using the equipment. The operator
must also know the operating, maintenance, and safety instructions of
CAUTION
the cylinder feed.

The wire ropes, their anchoring, return wheels, and other components
under load must be checked at least once a week.
CAUTION

Pressurized hydraulic hoses must not be touched by hand. The hoses

may have unnoticeable needle holes that let out high–pressure oil
sprays that may penetrate the skin.
WARNING

Beware of moving machine parts, especially the rotating drill rod. Carry
out maintenance and repair work when the rig is stopped. Make also sure
that the rig cannot be accidentally started during repair work.
WARNING

E 2001 SANDVIK TAMROCK CORP., Tampere Plant,

P.O.Box 100
FIN–33311 TAMPERE, Finland
Tel. +358 205 44 121, Telex 22335 parts fi
Telefax +358 205 44 4771
 4 (25) C 33500 – 3 en 0101 / PIR

CYLINDER FEED LF 1514

Maintenance and repair instructions

3. TECHNICAL DATA

Type identifier LF 1514

Feed force max. 36kN (160 bar)
Min. length [mm] 7370 mm
Weight [kg] 1360 kg
–without hose reel 1260kg

4. LIFTING POINTS

5. MAIN COMPONENTS

1. Feed rail
2. Rock drill
3. Drill carriage
4. Feed cylinder
5. Return wheel, upper
6. Return wheel, lower
7. Pito
8. Movable suction head
9. Ground jack
10. Hose reel

E 2001 SANDVIK TAMROCK CORP., Tampere Plant,

P.O.Box 100
FIN–33311 TAMPERE, Finland
Tel. +358 205 44 121, Telex 22335 parts fi
Telefax +358 205 44 4771
 C 33500 – 3 en 0101 / PIR 5 (25)

CYLINDER FEED LF 1514

Maintenance and repair instructions

10

2 1

E 2001 SANDVIK TAMROCK CORP., Tampere Plant,

P.O.Box 100
FIN–33311 TAMPERE, Finland
Tel. +358 205 44 121, Telex 22335 parts fi
Telefax +358 205 44 4771
 6 (25) C 33500 – 3 en 0101 / PIR

CYLINDER FEED LF 1514

Maintenance and repair instructions

6. OPERATING PRINCIPLE

The construction of the cylinder feed is such that the cylinder tube (14) moves during feed
operation, while the piston rod (13) is fixed to the rear end of the feed rail. The oil flows
to the cylinder through the piston rod to both sides of the piston. The movement speed
of the cylinder tube is doubled for the rock drill (2) by means of wire ropes (11) and (12)
and return wheel assemblies (4) and (5) at both ends of the cylinder tube. Hose reel (10)
is fixed to the cylinder tube (14).

13

10
A B

M
C1 C2

248
M M1 M2
14 4 249

11

V1 V2
2
12

E 2001 SANDVIK TAMROCK CORP., Tampere Plant,

P.O.Box 100
FIN–33311 TAMPERE, Finland
Tel. +358 205 44 121, Telex 22335 parts fi
Telefax +358 205 44 4771
 C 33500 – 3 en 0101 / PIR 7 (25)

CYLINDER FEED LF 1514

Maintenance and repair instructions

6.1. Adjusting feed cylinder overcenter valve (248) and sequence

valve (249)

M2
V2
249

248

V1
M1

C1 C2

248

M1 M2

249

V1 V2
1. Open the locking nut the of the overcenter valve (248) clockwise because the
screw has a left–hand thread.
2. Open the adjusting screw of the overcenter valve (248) fully by turning it clockwise
because the screw has a left–hand thread.
3. Tighten the adjusting screw of the overcenter valve (248) 2 turns
(=counterclockwise).
4. Open the locking nut of the sequence valve (249) (ccw).
5. Open the adjusting screw of the sequence valve (249) fully (ccw).
6. Tighten the adjusting screw of the sequence valve 2.5 turns (clockwise).
7. Tighten the locking nuts.
E 2001 SANDVIK TAMROCK CORP., Tampere Plant,
P.O.Box 100
FIN–33311 TAMPERE, Finland
Tel. +358 205 44 121, Telex 22335 parts fi
Telefax +358 205 44 4771
 8 (25) C 33500 – 3 en 0101 / PIR

CYLINDER FEED LF 1514

Maintenance and repair instructions

6.2. Approach stop device (safety wire)

Approach stop device is located in front end of the feed. If the safety wire is pulled hard
enough, or if it loosens, drilling and rod handling functions stop, as well as the dust
collector and the light in the switch box comes on The engine remains running. Resetting
is done by pushing the safety wire reset button. Check the function of the switch and light
every day.
Before resetting the device, check that the rod handling and drilling
controls are not in any operating position.

WARNING

6.3. Adjusting of the approach stop device (safety wire)

1. The diesel engine has to be stopped during adjustment.

2. Open the cover of the switch.
3. Tighten the steel wire (point B) so that the sensor (A) of the switch is at the middle
of the slot in the shaft (C).
4. Turn the ignition on and test the switch by pulling the wire; the light in the switch
box comes on when the switch reacts (you can also hear a click).
5. Switch must be reset by pressing the button in the box (light disappears).
If the adjustment is not correct the switch may react just because of
vibration during drilling or tramming.
CAUTION

E 2001 SANDVIK TAMROCK CORP., Tampere Plant,

P.O.Box 100
FIN–33311 TAMPERE, Finland
Tel. +358 205 44 121, Telex 22335 parts fi
Telefax +358 205 44 4771
 C 33500 – 3 en 0101 / PIR 9 (25)

CYLINDER FEED LF 1514

Maintenance and repair instructions

7. CHECKING, SERVICING, ADJUSTING, AND REPLACING WIRE

ROPES

Always check the wire ropes if something has happened that may have
damaged them.

WARNING

7.1. Checking and servicing

The following check–up and service procedures must be carried out daily / weekly.

Daily
D Check the wire rope mountings and tightness.
D Check the general condition and wear of the wire ropes, especially at the joint and
in the stretch that runs over the return wheel.
D Check that the wire ropes run straight (especially under the carriage), and that the
bottom of the feed is clean (remove rocks, etc.).

Weekly
D Clean the wire ropes and lubricate them.
D Check the wire ropes observing the following:
– broken wires (max. 15 / 350 mm)
– broken strands
– wire rope diameter (min. 11 mm)
– rust over the whole length of the wire rope
– strand or wire deformations
– IF ANY OF THE ABOVE DEFECTS ARE DETECTED, THE WIRE
ROPES MUST BE REPLACED (BOTH PULLING OR RETURNING
WIRE ROPES).
– More detailed information on checking and discarding wire ropes is given
in the ISO–4309 standard.

E 2001 SANDVIK TAMROCK CORP., Tampere Plant,

P.O.Box 100
FIN–33311 TAMPERE, Finland
Tel. +358 205 44 121, Telex 22335 parts fi
Telefax +358 205 44 4771
10 (25) C 33500 – 3 en 0101 / PIR

CYLINDER FEED LF 1514

Maintenance and repair instructions

7.2. Adjusting the wire ropes

1. Open the locking nuts (15) .

15

11
12

15

2. Check the carriage position on the chart below.

– D = the distance between the carriage front end and the feed end flange
– L3 = the distance between the Pito middle line and the shank end

Carriage position L3 / mm Rock drill

D / mm
60 30 HL 700
60 50 HL 1000
60 20 HL 1000 TUBE
135 0 HL 1500
60 0 HL 1500 TUBE

E 2001 SANDVIK TAMROCK CORP., Tampere Plant,

P.O.Box 100
FIN–33311 TAMPERE, Finland
Tel. +358 205 44 121, Telex 22335 parts fi
Telefax +358 205 44 4771
 C 33500 – 3 en 0101 / PIR 11 (25)

CYLINDER FEED LF 1514

Maintenance and repair instructions

L3

3. Check the carriage position on the chart and locate the carriage to position D + 5
mm by adjusting the return wire rope (12). While tightening nuts hold the
connecting rod to prevent twisting the wire rope. Tighten the wire ropes equally.

4. Tighten the pulling wire rope (11) so that the carriage moves approx. 5 mm toward
Pito. Carriage position is now as shown on the chart. Tighten the wire ropes
equally and prevent them from twisting.

In the feed with hose reel the location of the carriage with respect to the
hose reel must not change. The change of the distance between carriage
and hose reel causes change in the tightness of the hoses. This can break
CAUTION
the hoses or the hose reel.

E 2001 SANDVIK TAMROCK CORP., Tampere Plant,

P.O.Box 100
FIN–33311 TAMPERE, Finland
Tel. +358 205 44 121, Telex 22335 parts fi
Telefax +358 205 44 4771
12 (25) C 33500 – 3 en 0101 / PIR

CYLINDER FEED LF 1514

Maintenance and repair instructions

7.3. Replacing wire ropes

When replacing wire ropes, always replace both of the pulling or
returning wire ropes.
CAUTION

Removing wire ropes

1. Turn the boom and feed parallel with the rig middle line.
2. Drive the tilt cylinder extreme out position.
3. Drive the feed to the extreme forward position also drive the rock drill forwards but
not over the return wheel.
4. Lower the feed stinger against the ground.

5. Support rock drill carriage stabile.

6. Open the locking nuts (15) and remove the tightening nuts (16).
7. Take the wire ropes (11) and (12) off the return wheels (4) and (5) groove.
8. Pull the connecting rod off from the recess in the carriage (3), and remove the wire
rope by pulling it under the carriage.

15, 16
4
11
12
5
15, 16

E 2001 SANDVIK TAMROCK CORP., Tampere Plant,

P.O.Box 100
FIN–33311 TAMPERE, Finland
Tel. +358 205 44 121, Telex 22335 parts fi
Telefax +358 205 44 4771
 C 33500 – 3 en 0101 / PIR 13 (25)

CYLINDER FEED LF 1514

Maintenance and repair instructions

Installing wire ropes

1. Insert the wire rope under the carriage with the threaded rod first.
2. Install the wire rope on the return wheel.
3. Push the threaded rod through the mounting plate and install the tightening nut.
4. Check that the wire ropes run straight under the carriage, and over the plastic
plate.
5. Because the new wire ropes stretch a little at the beginning, their tightness have
to be checked in during the first days of use.

8. FEED RAIL AND CARRIAGE SLIDE PIECES

8.1. General

The feed rail of LF 1514 is made of a steel profile beam with stainless steel angle bars
welded to the slide surfaces.
The rock drill carriage runs along the feed rail on slide pieces. Each slide piece is mounted
to the carriage with three bolts through the slide piece body. These bolts lock the slide
pieces to the body in the lengthwise direction. Locking in crosswise direction is achieved
through the form of the slide piece and the body.

2
1

1. Stainless steel angle bar

2. Steel beam

E 2001 SANDVIK TAMROCK CORP., Tampere Plant,

P.O.Box 100
FIN–33311 TAMPERE, Finland
Tel. +358 205 44 121, Telex 22335 parts fi
Telefax +358 205 44 4771
14 (25) C 33500 – 3 en 0101 / PIR

CYLINDER FEED LF 1514

Maintenance and repair instructions

8.2. Adjusting slide piece clearances

The carriage had oblong holes to enable adjustment of slide piece clearances.
If the slide pieces have worn so that the clearance is more than 3 mm, the clearances must
be adjusted to the specified value. Loosen the mounting screws of the slide piece body.
There are three hex. socket screws on both sides of the carriage for adjusting the slide
piece body. The carriage clearance is adjusted to 1 mm, and then the mounting screws
of the slide piece body are tightened to 200 Nm.

1.0 mm Adjusting screws

3 pcs / side

clearance = 0

Mounting screws 12 pcs / side

9. REPLACING RETURN WHEEL BEARINGS

The return wheel assembly (front end) of the pulling wire ropes can be removed form the
feed without removing the feed cylinder.
– Slacken the pulling wire ropes and take them off the return wheel grooves.
– Remove the guide plate from the cylinder front end.
– Pull the return wheel assembly off the cylinder.
To remove the return wheel assembly of the returning wire ropes, the cylinder must be
removed from the feed (Cf. Chapter for cylinder removal instructions). The return wheel
assembly of the return wire ropes can be pulled off by removing the hose nipples.

E 2001 SANDVIK TAMROCK CORP., Tampere Plant,

P.O.Box 100
FIN–33311 TAMPERE, Finland
Tel. +358 205 44 121, Telex 22335 parts fi
Telefax +358 205 44 4771
 C 33500 – 3 en 0101 / PIR 15 (25)

CYLINDER FEED LF 1514

Maintenance and repair instructions

Replacing bearings
– Open the locking nuts of the cover.
– Remove the covers from the axle ends.
– Pull the return wheels off the axle (use a puller).
– Knock the outer bearing off the return wheel.
– Remove the securing ring from between the bearings.
– Press the inner bearings (2 pcs) out of the return wheel.
– Install the securing ring.
– Install the new bearings into the return wheel bearing housing (if necessary, warm
up the wheel to max. 200_C).
– Install the return wheel with its bearings on the axle.
– Install the covers with their mounting screws (observe the correct mounting
direction of the return wheels, see picture).
– Press grease on the greasing nipples so that it comes out from between the return
wheel and the cover.
If the wire rope groove has sharp edges, remove them by grinding. The return wheel must
be replaced if its outer diameter has worn below 150 mm or, measured at the bottom of
the wire rope groove, below 122 mm.

Greasing
1. Greasing the return wheels.
2. Greasing the joint between the return wheel body and the cylinder.

1 1

2 2

Return wheel assembly for pulling wire Return wheel assembly for returning
rope (front end) wire rope (rear end)

E 2001 SANDVIK TAMROCK CORP., Tampere Plant,

P.O.Box 100
FIN–33311 TAMPERE, Finland
Tel. +358 205 44 121, Telex 22335 parts fi
Telefax +358 205 44 4771
16 (25) C 33500 – 3 en 0101 / PIR

CYLINDER FEED LF 1514

Maintenance and repair instructions

10. FEED CYLINDER

10.1. Removing the feed cylinder

1. Turn the boom and the feed in line with the rig middle line.
2. Drive the tilt cylinder extreme out position.
3. Drive the feed to the extreme forward position and rock drill forward but not over
the return wheel.
4. Lower the feed stinger against the ground.

5. Support rock drill carriage stabile.

6. Feed with hose reel mark the hoses and remove them rock drill. Remove hose reel.
7. Open the locking nuts, remove the tightening nuts and take the wire ropes and off.
8. Drive the feed cylinder rod in (minimum position).
9. Remove the wear pieces and guide plate of the front return wheel.
10. Mark and remove he hoses of the feed cylinder.
11. Remove cylinder rod support plate.
12. Remove front return wheel.
13. Lift feed cylinder off.

E 2001 SANDVIK TAMROCK CORP., Tampere Plant,

P.O.Box 100
FIN–33311 TAMPERE, Finland
Tel. +358 205 44 121, Telex 22335 parts fi
Telefax +358 205 44 4771
 C 33500 – 3 en 0101 / PIR 17 (25)

CYLINDER FEED LF 1514

Maintenance and repair instructions

10.2. Cylinder structure

2 1 4 3

6 5
1. Cylinder tube
2. Piston rod
3. Mounting piece (fixed)
4. Pressure oil connection (cylinder extends = feed movement)
5. Pressure oil connection (cylinder retracts = return movement)
6. Cylinder limit bushing

10.3. Replacing seals

We recommend that the cylinder seals be replaced in conjunction with every other
overhaul of the rock drill (approx. every 1000 percussion hours).
D Check that the tools you need for the replacement work are clean. Clean also all
parts of the cylinder before starting the work.
D Lubricate the components to be installed.

Disassembling cylinder

1. Remove the fittings (1) from the feed cylinder.

2. Remove the cover (2) together with the O–rings.
3. Pull the piston (3), piston rod (4), cover (2) and the possible cylinder limit bushing
(5) out of the cylinder.
4. Remove the piston (3).
5. Pull the cover (2) and the possible cylinder limit bushing (5) from the piston rod (4).

3 4 5 2 1

E 2001 SANDVIK TAMROCK CORP., Tampere Plant,

P.O.Box 100
FIN–33311 TAMPERE, Finland
Tel. +358 205 44 121, Telex 22335 parts fi
Telefax +358 205 44 4771
18 (25) C 33500 – 3 en 0101 / PIR

CYLINDER FEED LF 1514

Maintenance and repair instructions

Replacing piston seal

1. Remove the old seal.

2. Install a new seal into the groove by carefully stretching it with strips. Installing can
be made easier by warming up the seal in an oven, in oil bath or water to a
maximum temperature of 200_C. A special tool is also available for seal mounting,
code 330 023 18.

3. After installing, the seal is seated into its groove using, for instance, the cylinder
tube. Oil the seal before seating.

E 2001 SANDVIK TAMROCK CORP., Tampere Plant,

P.O.Box 100
FIN–33311 TAMPERE, Finland
Tel. +358 205 44 121, Telex 22335 parts fi
Telefax +358 205 44 4771
 C 33500 – 3 en 0101 / PIR 19 (25)

CYLINDER FEED LF 1514

Maintenance and repair instructions

Replacing piston rod seal

1. Carefully bend the piston rod seal avoiding sharp bends. Install the sealing ring by
hand into the groove and press it round with fingers.

2. After installing, the sealing rings are seated into their grooves. The wiper is
threaded into its groove. Seating can be done with an oiled piston rod.
Assembling cylinder
1. Replace the O–rings (5) of the cover (2). Check that the O–rings are not left
twisted.
2. Push the cover (2) and the possible cylinder limit bushing (8) on the piston rod (4).
3. Replace the O–ring (6) of the piston (3) and install the piston.
4. Push the piston (3) and the piston rod (4) and the possible cylinder limit bushing
(8) to the cylinder tube (7) and thread the cover (2) closed. NOTE! The cylinder
tube is different in versions with hose reel and without hose reel.

Without hose reel With hose reel

5. Install the fittings (1) to the piston rod (4). Use new seals on the fittings.
3 6 4 7 2 5

8 1

E 2001 SANDVIK TAMROCK CORP., Tampere Plant,

P.O.Box 100
FIN–33311 TAMPERE, Finland
Tel. +358 205 44 121, Telex 22335 parts fi
Telefax +358 205 44 4771
20 (25) C 33500 – 3 en 0101 / PIR

CYLINDER FEED LF 1514

Maintenance and repair instructions

10.4. Installing feed cylinder

1. Mount the return wheel assembly to the cylinder rear end.
2. Put the cylinder into place so that the piston rod mounting piece goes into the slot
at the rear end of the feed, and the mounting piece locking plate into its place. The
cylinder tube is in different position when feed is with hose reel.

Without hose reel With hose reel

3. Mount the return wheel assembly to the cylinder front end.

4. Connect the feed cylinder hoses and run the cylinder outwards to enable
connecting the wire ropes.
5. Mount the wire ropes temporarily by screwing the tightening nuts a little way on the
threads and installing the wire ropes round the return wheels.
6. Install the wire cable guides (A) to the front end of the cylinder and the guide pieces
(B) to the guide plate and adjust the pieces (0.5–1 mm play). At the same time,
adjust the cylinder height so that the wire rope return wheels do not touch the feed
rail bottom (0.5 to 1 mm clearance).

A
B

E 2001 SANDVIK TAMROCK CORP., Tampere Plant,

P.O.Box 100
FIN–33311 TAMPERE, Finland
Tel. +358 205 44 121, Telex 22335 parts fi
Telefax +358 205 44 4771
 C 33500 – 3 en 0101 / PIR 21 (25)

CYLINDER FEED LF 1514

Maintenance and repair instructions

0.5 –1mm A

Feed without hose reel: Install the rear end guide pieces (B) to the guide plate and adjust
the clearance to 0.5 – 1 mm while cylinder is in minimum position.

B
0.5 –1mm

7. Install the wire ropes into the slots on the carriage and check that the wire ropes
run straight underneath the carriage, and over the plastic plate.
8. Adjust the wire ropes.

E 2001 SANDVIK TAMROCK CORP., Tampere Plant,

P.O.Box 100
FIN–33311 TAMPERE, Finland
Tel. +358 205 44 121, Telex 22335 parts fi
Telefax +358 205 44 4771
22 (25) C 33500 – 3 en 0101 / PIR

CYLINDER FEED LF 1514

Maintenance and repair instructions

10.5. Bleeding the feed cylinder

Hydraulic oil must be in operating temperature when bleeding the feed

cylinder.
CAUTION

1. Turn the boom and feed parallel with the rig middle line.
2. Drive the tilt cylinder out in extreme position.
3. Drive the feed forwards to the extreme position.
4. Lower the feed stinger against the ground.

5. Drive the feed cylinder so that there is about 1meter piston rod out of the cylinder.

A
M1 B

M2 A B

M1

M2

E 2001 SANDVIK TAMROCK CORP., Tampere Plant,

P.O.Box 100
FIN–33311 TAMPERE, Finland
Tel. +358 205 44 121, Telex 22335 parts fi
Telefax +358 205 44 4771
 C 33500 – 3 en 0101 / PIR 23 (25)

CYLINDER FEED LF 1514

Maintenance and repair instructions

6. Connect hoses long enough to measuring points M1 and M 2 and direct them to
waste oil cans.
7. Drive the feed cylinder in to minimum position. Keep driving the cylinder against
stopper until air has come out. Bleeding is properly done when there is no air in
the oil, oil is clear.
8. Disconnect hoses and fit protecting covers to measuring points.

A
B

M2

M1 A B
M1

M2

E 2001 SANDVIK TAMROCK CORP., Tampere Plant,

P.O.Box 100
FIN–33311 TAMPERE, Finland
Tel. +358 205 44 121, Telex 22335 parts fi
Telefax +358 205 44 4771
24 (25) C 33500 – 3 en 0101 / PIR

CYLINDER FEED LF 1514

Maintenance and repair instructions

11. PITO 15 H – RETAINER

When drilling long holes, a front retainer with hydraulically operated jaws is used. The
condition of the jaw pieces affects the speed and ease of rod changing.
When 3½" tubes are used, the space between the arms can be increased by turning the
plates (7).

1. Support arm 11. Spring pin

2. Front plate 20. Bolt
3. Rear plate 21. Locking washer
4. Hydraulic cylinder 22. Bolt
5. Axle 23. Locking washer
6. Axle 50. Locking washer
7. Plate 51. Bolt
8. Sleeve 52. Jaw
9. Grease nipple
10. Spring pin

E 2001 SANDVIK TAMROCK CORP., Tampere Plant,

P.O.Box 100
FIN–33311 TAMPERE, Finland
Tel. +358 205 44 121, Telex 22335 parts fi
Telefax +358 205 44 4771
 C 33500 – 3 en 0101 / PIR 25 (25)

CYLINDER FEED LF 1514

Maintenance and repair instructions

11.1. Replacing jaw pieces

Replacing jaw pieces is a regular maintenance task on the Pito retainer. Open the jaw,
remove the jaw piece mounting screws, and knock the jaw pieces loose. Install new jaw
pieces and tighten the mounting screws.
Check that the jaw pieces correspond to the drill steel diameter you are
using (1 ¼", 1 ½", 1¾", 2", 2 3/8” Tube 3½").
CAUTION

The engine must be stopped during the jaw pieces replacement work.

CAUTION

11.2. Retainer maintenance

– Remove the stinger and suction head assembly from Pito.
– Remove Pito from the feed.
– Drive the spring pins (part 10) out using a suitable size punch that does not damage
the pin.
– Drive the pins (5) out to remove the hydraulic cylinder (4).
– Undo the tie rod (20) to remove the front plate (2).
– Remove the arms (1) from their axles (6).
– Wash all parts thoroughly.
– Check the pins and axles, as well as the bearing bushings at the arms and cylinder
eyes.
– Reassemble the retainer.
– Lubricate the pins and axles through the nipples (9).

11.3. Retainer alignment

2

1
The retainer jaw must be aligned with the rock drill shank.
Loosen the four bolts (1) and align the Pito retainer (2) so that the rock drill shank is
centered in a sleeve held in the retainer jaw. Tighten the four bolts.

E 2001 SANDVIK TAMROCK CORP., Tampere Plant,

P.O.Box 100
FIN–33311 TAMPERE, Finland
Tel. +358 205 44 121, Telex 22335 parts fi
Telefax +358 205 44 4771