Atlas Copco Underground drill rigs
Diamec® U6
APC Hydraulic system
Printed matter No: 6991 1274 01a
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Contents
Page
1. Power Unit 55/75E 3
2. Main valve (4V0) 4
3. Service valve (5V0) 5
4. Positioning valves 7
5. Hydraulic diagrams 11
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Power Unit 55/75E
Electrical Motor (0M1) data:
ABB 55/75 kW High Efficiency 4 pole motor
50 Hz: 380-415V D, 1480 rpm
660-690V Y, 1480 rpm
60Hz: 440V D, 1776 rpm
(Other voltages available on demand)
Hydraulic Main Pump (0P1) Data:
Bosch Rexroth GMBH A1OV 100cc (55E), 140cc (75E)
Automatic adjusted by actuators, maximum;
Pressure: 315 bar
Flow: 140 l/min (55E), 200 l/min (75E)
Stand by setting: 20 bar (55E), 25 bar (75E)
Hydraulic Service Pump (0P2) Data:
Bosch Rexroth GMBH A1OV 45cc
Automatic adjusted by actuators, maximum;
Pressure: 300 bar (Normally 240)
Flow: 60 1/min (limited by setscrew)
Cooler (0Z1)
On the Diamec U6, a water/oil cooler is mounted as standard. As an alternative, an Air/oil cooler can be chosen
instead. A hydraulic motor drives the Air/oil cooler.
Filters (0F1, 0F2, 4F1, 5F1)
There are four filters in the hydraulic system; they are Return filter (0F1, placed on the hydraulic tank) Air filter
(0F2, placed on the hydraulic tank), Main pressure filter and Service pressure filter (4F1, 5F1, placed in the
hydraulic package). Recommended change interval on all filters is one year. The rig is equipped with 10 micron
filter inserts from factory in return filter and 25 micron filter inserts in pressure filter.
Hydraulic oil tank (TI)
The tank size is 120 liter of oil; it is equipped with a sight glass and thermometer. It is equipped with air filters
and has a combined temperature and level guard sticking down from the lid (0S1). On the front side there is a
drain box, this in order to get a controlled drain oil flow into the tank. The drain box is filled with oil, before
disconnecting any drain hose please empty the box with the connected hand pump (0P3). The drain box also
have a magnetic plug for indication and removal of metal particles in the oil (0Z4).
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3719 0003 00 Main valve (4V0)
The main valve is a load sense valve with
four work port sections. Starting from the
inlet (bottom) section, they control: Wire
line hoist, Drill motor, Water pump, and
the Feed cylinder.
4V4
4V1 Wire line section: closed center 4V5 –
spool. 4V11
Settings: 75 1/min, refilling/chock
valves set at 180 bars
4V2 Drill motor section: open center
4V3
spool.
Settings: 120 1/min for 60 cc, 88 cc
motor, 160 l/min for 110 cc and 160 cc 4V2
motors.
4V3 Water pump section: closed center
spool.
Settings: 55 1/min when using Trido 80, 4V1
75 l/min when using Trido 140.
4V4 Feed cylinder section: closed
center spool.
Settings: 140 1/min for 1800 mm Feed,
90 liters for 850 mm Feed,
refilling/chock valves set at 320 bars
4V14 4V12
4V5 – 4V11 are pilot pressure reducing
valves, which controls the four main valve section spools.
All four main valve sections are remotely controlled from the APC console.
In the inlet section there is a pressure relief valve (4V14) set at 345 bars, to prevent pressure peaks in the
hydraulic system.
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3719 0003 01 Service valve (5V0)
5V3 5V63
5V7
5V8 (not showed)
5V9
5V61
5V2
5V3
5N1
5V5
5V10 5V42
5Z1
5V62 (not showed) 5V41
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3719 0003 01 Service valve (5V0)
Valve block 5V0 is placed in the hydraulic package, on the side of the positioner. All valves mounted in the
block except 5V7 and 5V5 are controlled remotely from the APC console. The numbers in brackets are
connection numbers on cables to the control system.
Valve 5V9, 5V41, 5V42 and nozzle 5N1 control the feed cylinder movement when drilling. Direction valves
5V62, 5V63 and pressure reducer 5V5 are valves for rod handling logic. Valve 5V7 and 5V8 controls the flush
pump. 5S1 to 5S4 are pressure transducers that give the control system feedback on pressure levels needed for
rod handling logic and feed rate control.
Valve 5V2 is a pressure reducing valve of the same type as valve 4V5 – 4V11. It feeds the rotation motor
displacement control. It changes the motor displacement with signal between 20 and 30 bar. From port X, a 30
bar stabilized pressure from the 4V0 valve is fed to valve 5V2.
Valve 5V10 is a pressure reducing/relieving valve for regulation of the system pressure on the main pump (load
sense pressure).
Valve 5V3 is a valve that relieves the pressure from the service pump. When energized, it passes the full service
pump flow back to tank (through the cooler and filter).
Valve 5V61 controls the wire line freewheeling valve (1V1). When energized, the A and B port on the wire line
motor is shortcut, and the wire runs freely from the wire line hoist.
Valve 5V62 controls the rod holder. When energized, pressure passes the valve and opens the rod holder.
Nozzle 5Z1 delays the opening time of the rod holder a fraction of a second and enables the control system to
measure the pressure in the gas spring in the rod holder.
Valve 5V7 and 5V8 gives a pressure compensated proportional oil flow, used to control the flush pump when
drilling. 5V7 is the pressure compensating valve and 5V8 control the flow. Pressure compensation is needed to
keep a constant water flow to the drill bit, independent of pressure drop in the drill hole.
Valve 5V63 controls the chuck on the rotation unit. When energized, pressure passes the valve and closes the
chuck on the rod.
Valve 5V5 controls the chuck pressure, it is normally set at 100 to 120 bar, depending on application.
Valve 5V9 is a feed enable valve. When energized, flow passes the valve and the feed cylinder moves.
Valve 5V41 is a proportional pressure reducing/relieving valve. It regulates how much pressure that is put on the
feed side (rod holder side) of the feed cylinder.
Valve 5V42 is a proportional pressure reducing/relieving valve. It regulates how much pressure that is put on the
hold back side of the feed cylinder. Normally, enough pressure to balance the rod weight is put on the hold back-
side and the pressure put on the feed side.
Nozzle 7N1has a diameter of 0.8 mm; it limits the maximum drill speed to approximately 0.5 m/s
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Positioning valves (6V0) 3719 0002 99
The skid version of the Diamec ®U6 is equipped with a positioner arm with two pivoting points.
Valve 6V0 is placed inside the valve package at the side of the
positioner. It is a 3-valve section block with open center (plugged at
end) motor spools. A pressure-limiting valve protects the cylinders
from over loading.
Section 6V1 is plugged; it may be used for customer unique needs.
Section 6V2 is used for raising the feed frame. On the cylinder a dual
counter balance valve placed to keep the cylinder locked in position
over time, and also prevent possible accidents in case of a hose break or
excessive force on the feed beam.
Section 6V3 is used for tilting the positioner arm. On the two cylinders,
dual counter balance valves are placed to keep the cylinders locked in
position over time, and also prevent possible accidents in case of a hose
break or excessive force on the feed beam.
Nozzles 6N2 are limiting the speed of the positioning movements, in order to give a smooth movement.
Valve 6V4 is placed next to valve 6V0. It must be switched to activate either the
positioner valve (6V0) or the Service valve block (5V0). This is a safety
function. The rig must not be repositioned while drilling. That may cause
damage to the rig and ITH equipment as well as personal injuries.
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Positioning valves (9V0) 3719 0011 59
The crawler version of the Diamec ® U6 has a different arrangement of positioning and tramming valves. The
valves are divided into two blocks, a fixed valve (9V0) – placed in the crawler pulpit, and a loose valve (6V0) -
that is carried to the best place for the best survey.
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Positioning valves (9V0) 3719 0011 59
Valve 6V6 is placed at the rear right side of the crawler. It must be switched to activate either the Tramming and
support jack valve (9V0) or the Service valve block (5V0). This is a safety function. The rig must not be
repositioned while drilling. That may cause damage to the rig and ITH equipment as well as personal injuries.
Tramming and support jack valve 9V0 is placed over the 6V6 valve. It is used for tramming to the drill site
and for support and height positioning the rig on the hole. A pressure relief valve set at 220 bar in the inlet
section protects the support jacks from over pressure. The valve is an open centered valve, this guarantees
cooling of the oil when activated. To activate the valve, turn the three-way ball valve, 6V6, into tramming mode.
Valve section 9V1 controls the left traction motor. On the motor a counter balance valve block is mounted. This
is to have a controlled motion in down hill motion, and to protect the motor from over pressure.
Valve section 9V2 control the front left support jack. On the cylinder a dual pilot check valve placed to keep the
cylinder locked in position over time, and also prevent possible accidents in case of a hose. An orifice in the
fittings to the cylinder gives a smooth operation.
Valve section 9V3 control the rear left support jack. On the cylinder a dual pilot check valve placed to keep the
cylinder locked in position over time, and also prevent possible accidents in case of a hose. An orifice in the
fittings to the cylinder gives a smooth operation.
Valve section 9V4 is used for pressurizing the circuit. Both end positions of the lever has detent. That mean that
the lever can be left energized, and the flow is blocked from that section on. Between the inlet of valve 9V0 and
the outlet of valve 6V6, a pressure connection to valve 6V0 is plumbed. Whenever valve section 9V4 is
energized, valve 6V0 can be operated.
Valve section 9V5 controls the rear right support jack On the cylinder a dual pilot check valve placed to keep
the cylinder locked in position over time, and also prevent possible accidents in case of a hose. An orifice in the
fittings to the cylinder gives a smooth operation.
Valve section 9V6 controls the front right support jack On the cylinder a dual pilot check valve placed to keep
the cylinder locked in position over time, and also prevent possible accidents in case of a hose. An orifice in the
fittings to the cylinder gives a smooth operation.
Valve section 9V7 controls the right traction motor. On the motor a counter balance valve block is mounted.
This is to have a controlled motion in down hill motion, and to protect the motor from over pressure.
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Positioning valves (6V0) 3719 0006 28
The crawler version of the Diamec ® U6 has a different arrangement of positioning and tramming valves. The
valves are divided into two blocks, a fixed valve (9V0) – placed in the crawler pulpit, and a loose valve (6V0) -
that is carried to the best place for the best survey.
Valve 6V0 is a five sectional valve. To activate the 6V0 valve, 6V6 must be put in tramming/positioning mode
and 9V4 must be locked in a detent position.
Section 6V1 is used to operate the worm gear motor; it is equipped with 80 bars dual chock valves to protect the
motor from over pressure caused by sudden breakage of the anchoring device
Section 6V2 is used for tilting the feed frame holder. On the cylinder a dual pilot check valve placed to keep the
cylinder locked in position over time, and also prevent possible accidents in case of a hose.
Section 6V3 is used to dump the feed frame in the feed frame holder - to get the rod holder close to the rock
face. It is equipped with one 80 bar and one 50 bar chock valves to protect the dump cylinder from breakage.
The 80 bar setting correlates to the piston rod side as to compensate for the smaller ring area.
Section 6V4 is used for move the stand forward and back on the crawler frame. On the cylinder a dual pilot
check valve placed to keep the cylinder locked in position over time, and also prevent possible accidents in case
of a hose.
Section 6V5 is used for move the stand sideways on the crawler frame. On the cylinder a dual pilot check valve
placed to keep the cylinder locked in position over time, and also prevent possible accidents in case of a hose.
Nozzle 6N1 0.7 mm threaded into the fitting on the P port of the positioning valve. The nozzle limits the speed
of positioning functions.
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Hydraulic diagram Components used for wire line control
When using the wire line hoist - pumps, filters, valves and actuators are used according to the schematic above.
This schematic is only an example of a setup - different size and type of pump, cooler etc may be used. This has,
however, no effect on the described function.
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Hydraulic diagram Components used for flush water control
When using the water pump for flushing (not drill water) - pumps, filters, valves and actuators are used
according to the schematic above. This schematic is only an example of a setup - different size and type of
pump, cooler etc may be used. This has, however, no effect on the described function.
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Hydraulic diagram Components used for drilling rotation
When using the drill motor - pumps, filters, valves and actuators are used according to the schematic above.
This schematic is only an example of a setup - different size and type of pump, cooler etc may be used. This has,
however, no effect on the described function.
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Hydraulic diagram Components used for rod running into the hole
When using the U6 for rod running into the hole - pumps, filters, valves and actuators are used according to the
schematic above. This schematic is only an example of a setup - different size and type of pump, cooler etc may
be used. This has, however, no effect on the described function.
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Hydraulic diagram Components used for breaking a rod joint
When using the U6 breaking a rod joint - pumps, filters, valves and actuators are used
according to the schematic above. This schematic is only an example of a setup - different
size and type of pump, cooler etc may be used. This has, however, no effect on the described
function.
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