PDF Operator Manual CAT Terex MK7-2 Drill Jumbo - 11 MB
This is the operator's manual for the CAT Terex MK7-2, a 2-boom drill jumbo used in mining and tunneling applications.
The manual provides comprehensive instructions on how to safely operate this complex piece of drilling equipment.
It covers all controls, drilling procedures, and daily safety inspections.
For operators, this guide is the primary resource for achieving high performance and maintaining a safe work environment.
PDF Viewer
Viewer loads when you scroll here
SHARE THIS MANUAL
Download the PDF Manual
PDF viewer loading area
Text Preview from This Manual
The text below was extracted from the visible preview pages to help you confirm the manual contents before download.
--- Page 1 ---
BI621993
© Bucyrus
All Rights Reserved
BUCYRUS R
Technical Manual
--- Page 3 ---
BI621993
MK7-2 DRILL JUMBO OPERATOR’S MANUAL
Number: OM-MK7-S4
Revision: Original
Revision Date: 03-MAR-2005
By: DJJ
Topic: Fire Prevention Safety
FIRE PREVENTION SAFETY
Fires can create severe emergencies where both human life and property may be lost.
Even when confined, a fire may cause very expensive damage to your equipment. Fire
can strike at any time, not only when the equipment is used, but also when left
unattended between work shifts and nobody is around to fight it.
When working in a confined environment, it is impossible to prevent combustive dust
from collecting in tight corners of the machine. This dust, in itself, may not cause a fire;
however, when mixed with fuel, oil or grease in a hot and confined place, it can become
a fire hazard. To reduce the chances of a fire occurring, follow the preventative
instructions listed below:
• Inspect the machine daily for potential fire hazards and make any necessary repairs
immediately.
• Always ensure that excess grease and oil accumulation, including spillage, are
cleaned up immediately.
• Set up, and follow a wash schedule. Use only nonflammable cleaning agents for
cleaning the machine or machine components.
• Discard oily rags and other combustible materials in the proper designated location;
do not store them on the Drill Jumbo.
• Before performing repair work such as welding, the area surrounding the repair
location should be cleaned and a fire extinguisher positioned close by.
• Ensure that you are familiar with the location of the machine’s fire suppression
system actuators and KNOW HOW TO USE THEM.
• Maintain a charged fire extinguisher on or near the Drill Jumbo at all times and
KNOW HOW TO USE IT.
Page 1 of 2
--- Page 4 ---
BI621993
MK7-2 DRILL JUMBO OPERATOR’S MANUAL
Number: OM-MK7-V1
Revision: Original
Page 10 of 10
--- Page 5 ---
BI621993
MK7-2 DRILL JUMBO OPERATOR’S MANUAL
Number: OM-MK7-V3
Revision: Original
PRESSURE
FILTER
FILTER BYPASS
INDICATOR
HYDRAULIC MAIN HYDRAULIC
CONTROL PUMP (MOUNTED
MANIFOLD TO TRANSMISSION)
Figure 2 – Carrier Hydraulic Components in Powerframe Assembly Area
Main Hydraulic Pump – the hydraulic pump for the carrier hydraulic system is a
variable displacement piston pump with a pressure/flow (load sense) controller. The
pump is mounted directly to the upper right pump drive on the transmission. When the
Drill Jumbo is in “Drive” mode the pump operates under load sense conditions. When
the Drill Jumbo is in “Auxiliary” mode the pump operates under pressure compensated
(full pressure) conditions.
Pressure Filter – this component provides downstream filtration directly from the
hydraulic pump before the hydraulic fluid reaches any hydraulic valving. There is a
visual “pop-out” indicator that signals when the filter needs to be replaced.
Hydraulic Control Manifold – this manifold contains several cartridge valves and
provides the ability to switch the hydraulic flow between the “Drive” and “Auxiliary” mode
functions. It also controls whether the pump operates under load sense or pressure
compensated conditions. For more detailed information on this manifold please refer to
maintenance bulletin MB-HYD1394.
Page 5 of 20
--- Page 6 ---
BI621993
MK7-2 DRILL JUMBO OPERATOR’S MANUAL
Number: OM-MK7-V3
Revision: Original
AIR SYSTEM
The air system uses components that are located throughout the Drill Jumbo.
The air compressor installation is located in the rear deck assembly and is shown in
Figure 11.
AIR INTAKE
FILTER
AIR PRESSURE
FILTER
AIR PRESSURE
GAUGE
AIR TEMPERATURE
GAUGE/SWITCH
Figure 11 – Air Compressor Located in Rear Deck Assembly
Air Intake Filter – this filter removes any contamination entering the compressor.
Air Pressure Filter – this filter removes any contamination leaving the air compressor.
Air Pressure Gauge – this gauge displays the discharge pressure of the compressor.
Air Temperature Gauge/Switch – this combination gauge and switch displays the
discharge temperature of the air and shuts down the compressor if the temperature
exceeds 115°C. A red alarm indicator in the operator’s control console comes on at
100°C to allow the operator time to shut down the compressor prior to an automatic shut
down. The temperature must be allowed to cool back down sufficiently before the
compressor can be turned back on.
Page 16 of 20
--- Page 7 ---
BI621993
MK7-2 DRILL JUMBO OPERATOR’S MANUAL
Number: OM-MK7-V4
Revision: Original
The carrier junction box is located in the powerframe assembly area of the Drill Jumbo
and is mounted to the front of the hydraulic tank. This junction box does not contain any
switches or controls. Figure 5 shows the location of the carrier junction box.
CARRIER
JUNCTION BOX
Figure 5 – Carrier Junction Box Location
Page 7 of 16
--- Page 8 ---
BI621993
MK7-2 DRILL JUMBO OPERATOR’S MANUAL
Number: OM-MK7-O1
Revision: Original
INTERLOCKS
The Drill Jumbo has several interlocks. These interlocks are designed to help protect
the operator and the equipment.
Automatic Brake Application Interlock – the vehicle’s braking system is designed
such that the unit’s emergency/park brakes will apply in the event of low accumulator
pressure, low transmission clutch pressure, if there is a loss of electrical power, or if the
cable reel last wind interlock is activated. In the event that the machine is switched from
Drive to Auxiliary Mode, the Automatic Brake application system will apply the brakes
regardless of the position of the emergency/park brake button.
Cable Reel Last Wind Interlock – this interlock is designed to prevent the Drill Jumbo
from driving away from the electrical sub-station any further than what the electrical
cable will allow. It warns the operator when the electrical trailing cable is getting close
to being completely spooled out and it automatically applies the brakes when the cable
is completely spooled out. The interlock will illuminate the amber indicator light located
in the driver’s instrument panel when three (3) or less spools of trailing cable are left on
the cable reel. The interlock will illuminate the red indicator light and will apply the
emergency/park brakes when one (1) spool of trailing cable is left on the cable reel. At
this point the operator will have to use the cable reel last wind override switch in order to
release the brakes and drive towards the cable and reel in the trailing cable. The
operator should drive slowly and ensure that the cable is not run over.
Rock Drill Lube Pump Interlock – this interlock is designed to prevent drilling if there
is insufficient lubrication that may damage the rock drill. The interlock uses the air
pressure switch and oil level sensor to allow the drill impact, feed, and rotation lock
functions from operating. If either air pressure or rock drill oil level becomes insufficient
the lube pump will stop operating and the drill functions will not operate.
Hydraulic Tank Pressure Interlock – when equipped, this interlock is designed to
protect the AC electric powerpacks from starting unless there is sufficient air pressure in
the hydraulic tank. The air compressor must be started first and the tank air pressure
switch must sense sufficient air pressure before the powerpacks can be started.
Hydraulic Tank Level/Temperature Interlock – this interlock is designed to prevent
the operation of the AC electric powerpacks if the level of the hydraulic fluid is too low
(leading to possible cavitation of the pumps) or if the temperature is too high (leading to
insufficient lubrication of the pumps). There are two (2) amber warning indicators in the
operator’s control console that will illuminate when these shutdown conditions are being
approached.
Page 2 of 2
--- Page 9 ---
BI621993
MK7-2 DRILL JUMBO OPERATOR’S MANUAL
Number: OM-MK7-O4
Revision: Original
FEED CONTROLS
The same joystick controls that operate the boom functions can be used to operate the
feed functions by changing the control console from Boom mode to Feed mode. Either
depressing the green Feed mode switch/indicator or either of the bottom two buttons on
the joystick can do this. When the control console is in Feed mode the green indicator
light will illuminate.
Feed Dump – this function is proportionally controlled using the Y-axis of the joystick.
Moving the joystick forward will cause the feed to dump downward and pulling back will
cause the feed to dump upward. The further the joystick is displaced in either direction
the faster the function will move.
Feed Swing – this function is proportionally controlled using the X-axis of the joystick.
Moving the joystick to the left will cause the feed to swing to the left and moving the
joystick to the right will cause the feed to swing to the right. The further the joystick is
displaced in either direction the faster the function will move.
Feed Rollover – this function is proportionally controlled using the Z-axis of the joystick.
Rotating the joystick to the left will cause the feed to rollover to the left and rotating the
joystick to the right will cause the feed to rollover to the right. The further the joystick is
displaced in either direction the faster the function will move.
Feed Extend – this function is discretely controlled using the two top buttons on the
joystick. Depressing and holding the left button will cause the feed to extend outward.
Depressing and holding the right button will cause the feed to extend inward. This
function moves at a constant speed.
Feed Extend Lock – this function is discretely controlled using the toggle switch below
the drill joystick. Moving this switch up will cause the feed to extend continuously until
the switch is moved back down. This feature is typically used during drilling where a
constant sting force is required.
Feed Table Dump – this function is discretely controlled using the toggle switch below
the joystick. Moving the switch up will cause the feed table to dump upward and moving
the switch down will cause the feed table to dump downward. Releasing the switch will
allow it to automatically return to the neutral position.
Page 3 of 6
--- Page 10 ---
BI621993
MK7-2 DRILL JUMBO OPERATOR’S MANUAL
Number: OM-MK7-M1
Revision: Original
14. AC panel inspection and testing emergency stop switches.
Inspect the AC panel’s general condition. All instrument gauges, indicator lights, and
switches should be free of damage. The panel should be fastened closed.
Ensure the Drill Jumbo is connected to the mine’s power supply. The main disconnect
switches for the carrier and AC panel should both be in the “ON” position. Connect AC
power to the Drill Jumbo by pressing the main power reset switch.
Start both of the AC electric powerpacks. Test both of the emergency stop buttons (AC
panel, operator’s control console) to ensure that both shut down the electric powerpacks
and they cannot be re-started unless the emergency stop button is pulled out and the
main power is reset.
With the AC electric powerpacks off, start the diesel engine. Test both of the emergency
stop buttons again to ensure that both shut down the engine and prevent it from being
re-started unless the emergency stop button is pulled out.
15. Compressor inspection.
Check the oil level in the compressor using the sight gauge found in the side of the oil
compressor unit. There is a maximum and minimum level indicator on the sight gauge.
Start the compressor and confirm that it builds normal pressure (approx 115 psi). There
will typically be some foaming of the oil. Also check that the air intake filter indicator is
within the acceptable range.
The remote mounted air pressure filter has a small valve in the bottom of the housing to
allow any collected moisture to be drained away. Open this valve with the compressor
running to purge any water and then close.
16. Test all boom, feed, and drilling functions.
With the AC electric powerpacks, water pump, and air compressor running operate each
of the boom, feed and drilling functions to ensure all are working properly. Rock drill
lubricator will need to be filled in order for the drill rotation to be operational.
Monitor the operation of the boom and feeds for any signs of excessive play indicating
maintenance is required.
Page 8 of 8
--- Page 11 ---
BI621993
Description: Transmission, 32000 Dana-Spicer Service
Manual
Number: MB-TRA1329
Revision: Original
Revision Date: May 8, 2003
By: IFL
Part Number(s) Affected: 1051660
Machine Model(s) Affected: All Equipped
This document is supplied as a service. MacLean Engineering cannot be held
responsible for errors or omissions in the vendor supplied document. The information
provided was known to be up to date at time of printing. However the vendor has the
right to change documentation without notice. If any discrepancies occur please contact
MacLean Engineering as soon as possible. Up to date information will be sent where
possible.
See the following attached document:
SPICER OFF-HIGHWAY COMPONENTS
Service Manual
MB-TRA1329 Page 1 of 154
--- Page 12 ---
BI621993
Page 12 of 154 MB-TRA1329
--- Page 13 ---
BI621993
MB-TRA1329 Page 23 of 154
--- Page 14 ---
BI621993
Page 34 of 154 MB-TRA1329
--- Page 15 ---
BI621993
MB-TRA1329 Page 45 of 154
--- Page 16 ---
BI621993
Page 56 of 154 MB-TRA1329
--- Page 17 ---
BI621993
MB-TRA1329 Page 67 of 154
--- Page 18 ---
BI621993
Page 78 of 154 MB-TRA1329
--- Page 19 ---
BI621993
MB-TRA1329 Page 89 of 154
--- Page 20 ---
BI621993
Page 100 of 154 MB-TRA1329
--- Page 21 ---
BI621993
MB-TRA1329 Page 111 of 154
--- Page 22 ---
BI621993
Page 122 of 154 MB-TRA1329
--- Page 23 ---
BI621993
MB-TRA1329 Page 133 of 154
--- Page 24 ---
BI621993
Page 144 of 154 MB-TRA1329
--- Page 25 ---
BI621993
Description: Transmission, 32000 Dana-Spicer, Parts
Manual
Number: MB-TRA1313
Revision: Original
Revision Date: February 19, 2003
By: IFL
Part Number(s) Affected: 1051660
Machine Model(s) Affected: All Equipped
This document is supplied as a service. MacLean Engineering cannot be held
responsible for errors or omissions in the vendor supplied document. The information
provided was known to be up to date at time of printing. However the vendor has the
right to change documentation without notice. If any discrepancies occur please contact
MacLean Engineering as soon as possible. Up to date information will be sent where
possible.
See the following attached document:
SPICER OFF-HIGHWAY PRODUCTS DIVISION
Parts Manuals
Form No. GRP-000 (Rev.01/01)
MB-TRA1313 Page 1 of 50
--- Page 26 ---
BI621993
Page 12 of 50 MB-TRA1313
--- Page 27 ---
BI621993
MB-TRA1313 Page 23 of 50
--- Page 28 ---
BI621993
Page 34 of 50 MB-TRA1313
--- Page 29 ---
BI621993
MB-TRA1313 Page 45 of 50
--- Page 30 ---
BI621993
Title: Procedure, Drive-Line Brake Repair
Number: MB-MEC1450
Revision: A
2.8 Using a shop press, remove the bearing cones from shaft, as shown in Figure 7.
Figure 7 - Removal of Bearings With Press
WARNING!
Use caution when using compressed air to remove piston. Before
removing piston from power plate take preventive measures to ensure
that piston is being removed safely.
ALL INTERNAL PARTS (I.E. SPRINGS & PLATES) SHOULD
ALREADY BE REMOVED FROM BRAKE BODY.
2.9 To remove piston follow these steps:
1. Replace Stationary plate, and bolts in positions
#2 #1 and #2 with M12x1.75x70 bolts, as shown in
Figure 8.
2. Add air pressure regulator to hydraulic inlet, and
slowly introduce 15 psi of compressed air. Allow
the piston to separate from the power plate.
3. First the compressed air must be turned off, and
then remove the air pressure regulator from the
hydraulic inlet.
4. Remove the bolts, and the stationary plate. The
piston should be loose from the power plate, and
#1 can be removed.
Figure 8 - Bolt Locations 5. Remove the o-ring from O.D. and I.D. of the
piston groove, as shown in Figure 9.
Page 6 of 16 MB-MEC1450
--- Page 31 ---
BI621993
Description: Inspection and Lubrication, Universal Joints
and Driveshafts
Number: MB-MEC1256
Revision: Level A
Revision Date: May 9, 2003
By: IFL
Part Number(s) Affected: Numerous
Machine Model(s) Affected: All Driveline Assemblies equipped with Spicer
This document is supplied as a service. MacLean Engineering cannot be held
responsible for errors or omissions in the vendor supplied document. The information
provided was known to be up to date at time of printing. However the vendor has the
right to change documentation without notice. If any discrepancies occur please contact
MacLean Engineering as soon as possible. Up to date information will be sent where
possible.
See the following attached document:
Service Manual – Spicer® Universal Joints and Driveshafts
Form No. #3264-1 3/90
MB-MEC1256A Page 1 of 38
--- Page 32 ---
BI621993
Page 12 of 38 MB-MEC1256A
--- Page 33 ---
BI621993
MB-MEC1256A Page 23 of 38
--- Page 34 ---
BI621993
Page 34 of 38 MB-MEC1256A
--- Page 35 ---
BI621993
aclean Canada – MAINTENANCE BULLETIN
Number: MB-MEC1170
Revision: Level A
TAPPED HOLE DEPTH FOR
STEEL = 1 1/2 x BOLT DIAMETER
ALUMINUM = 2 x BOLT DIAMETER
Chart #4: Grade 12.9 Metric SHCS Torquing the Head
Fastener Torque (Ft-lbs)
Bolt Diameter Antiseize Red Loctite or Dry Blue Loctite
Millimeter
M10 60 75 70
M12 100 130 125
M14 165 205 195
M16 255 320 305
M18 370 460 435
M20 500 625 (155) 595
M22 680 (170) 850 (210) 810 (200)
M24 865 (215) 1080 (270) 1025 (255)
M27 1265 (315) 1585 (395) 1505 (375)
M30 1720 (430) 2150 (535) 2045 (510)
Values in () represent input torque to a 4:1 torque multiplier
MB-MEC1170A Page 7 of 10
--- Page 36 ---
BI621993
Title: Hose List, MK7-2-004
Number: MB-HYD1596
Revision: Original
Hose No. Size Length Fitting Fitting Circuit Description
DF03L 8C 150 1 1 BOOM FROM LH BULKHEAD TO LH JOINER
DF03R 8C 150 1 1 BOOM FROM RH BULKHEAD TO RH JOINER
DF04L 8C 132 1 1 BOOM FRAME FROM LH JOINER TO LH DRILL BULKHEAD
DF04L 8C 132 1 1 BOOM FROM LH JOINER TO LH DRILL BULKHEAD
DF04R 8C 132 1 1 BOOM FROM RH JOINER TO RH DRILL BULKHEAD
DF11L 8C 85 1 1 BOOM FRAME FROM LH DRILL VALVE TO LH ANTI-JAM
DF11R 8C 58 1 1 BOOM FRAME FROM RH DRILL VALVE TO RH ANTI-JAM
DF12L 8C 109 1 L BOOM FRAME FROM LH ANTI-JAM TO LH BULKHEAD
DF12R 8C 109 1 L BOOM FRAME FROM RH ANTI-JAM TO RH BULKHEAD
DF13L 8C 150 1 1 BOOM FRAME FROM LH BULKHEAD TO LH JOINER
DF13L 8C 150 1 1 BOOM FROM LH BULKHEAD TO LH JOINER
DF13R 8C 150 1 1 BOOM FROM RH BULKHEAD TO RH JOINER
DF14L 8C 132 1 1 BOOM FRAME FROM RH JOINER TO RH DRILL BULKHEAD
DF14L 8C 132 1 1 BOOM FROM LH JOINER TO LH DRILL BULKHEAD
DF14R 8C 132 1 1 BOOM FROM RH JOINER TO RH DRILL BULKHEAD
DLB01 6B 36 1 1 STEER/BRAKE FROM BRAKE MANIFOLD TO DRIVE LINE BRAKE
DR01L 8C 163 1 1 BOOM FRAME FROM LH DRILL VALVE TO LH BULKHEAD
DR01R 8C 163 1 1 BOOM FRAME FROM RH DRILL VALVE TO RH BULKHEAD
DR02L 8C 150 1 1 BOOM FRAME FROM LH BULKHEAD TO LH JOINER
DR02L 8C 150 1 1 BOOM FROM LH BULKHEAD TO LH JOINER
DR02R 8C 150 1 1 BOOM FROM RH BULKHEAD TO RH JOINER
DR03L 8C 132 1 1 BOOM FRAME FROM LH JOINER TO LH DRILL BULKHEAD
DR03L 8C 132 1 1 BOOM FROM LH JOINER TO LH DRILL BULKHEAD
DR03R 8C 132 1 1 BOOM FROM RH JOINER TO RH DRILL BULKHEAD
DR11L 8C 163 1 1 BOOM FRAME FROM LH DRILL VALVE TO LH BULKHEAD
DR11R 8C 163 1 1 BOOM FRAME FROM RH DRILL VALVE TO RH BULKHEAD
DR12L 8C 150 1 1 BOOM FRAME FROM LH BULKHEAD TO LH JOINER
DR12L 8C 150 1 1 BOOM FROM LH BULKHEAD TO LH JOINER
DR12R 8C 150 1 1 BOOM FROM RH BULKHEAD TO RH JOINER
DR13L 8C 132 1 1 BOOM FRAME FROM LH JOINER TO LH DRILL BULKHEAD
DR13L 8C 132 1 1 BOOM FROM LH JOINER TO LH DRILL BULKHEAD
DR13R 8C 132 1 1 BOOM FROM RH JOINER TO RH DRILL BULKHEAD
EB02 6B 80 1 L STEER/BRAKE
EB04 6B 23 1 L STEER/BRAKE
EB06 6B 23 1 L STEER/BRAKE
EB14 6B 56 1 L STEER/BRAKE
Page 8 of 16 MB-HYD1596
--- Page 37 ---
BI621993
Title: Drill Lubrication System
Number: MB-HYD1570
Revision: Original
3. Making Adjustments
Oil level Switch adjustment: The oil level switch is a factory set reed style switch that
includes predetermined heights. If the rock drill lube level drops below the lower
predetermined height the switch will close the contacts between 1 and 2 and the
machine specific drill interlocks will be activated which will prevent the operator from
drilling and the drill lubrication pump will be de-energized. See Figure B that has the
level switch shown in the low level condition.
Figure B – Drill Lube Pump Level Switch Schematic
Air Pressure Regulator: In general, the maximum pressure recommended for the lube
air to the fronthead of a rock drill is 35 to 40 PSI. Turning the knob on the pressure
regulator adjusts the air pressure for the lube system. If the pressure is ever adjusted
below 25 PSI, there will not be enough pressure to satisfy the pressure switch, the
pump will not rotate and the machine specific drill interlocks will be activated which will
prevent the operator from drilling.
The air pressure switch is a factory-preset style of switch that cannot be adjusted.
MB-HYD1570 Page 3 of 12
--- Page 38 ---
BI621993
Title: Pump, Grundfos Installation & Operations
Number: MB-HYD1563
Revision: Original
Page 2 of 38 MB-HYD1563
--- Page 39 ---
BI621993
Title: Pump, Grundfos Installation & Operations
Number: MB-HYD1563
Revision: Original
MB-HYD1563 Page 13 of 38
--- Page 40 ---
BI621993
Title: Pump, Grundfos Installation & Operations
Number: MB-HYD1563
Revision: Original
Page 24 of 38 MB-HYD1563
--- Page 41 ---
BI621993
Title: Pump, Grundfos Installation & Operations
Number: MB-HYD1563
Revision: Original
MB-HYD1563 Page 35 of 38
--- Page 42 ---
BI621993
Title: Brake Manifold for Mercedes Powered Vehicles
Number: MB-HYD1528
Revision: Original
This towing procedure is to release all secondary (spring applied) brakes. This
nameplate should be located somewhere near the brake manifold. Figure 4 illustrates a
typical towing instructions name plate.
Figure 4 – Brake Release Instructions Name Plate
Page 8 of 12 MB-HYD1528
--- Page 43 ---
BI621993
Title: Setup Guide, Hydraulic
Number: MB-HYD1461
Revision: Original
2.1.2 Diesel Driven Pump Control
The diesel driven pump is a variable displacement pump and has both a maximum
pressure and differential (standby) pressure adjustment as shown in Figure 2.
DIFFERENTIAL PRESSURE
ADJUSTMENT
MAXIMUM PRESSURE
ADJUSTMENT
Figure 2 – Diesel Driven Pump Controls
The maximum pump pressure can be adjusted using the following procedure:
1. Remove the cap from the maximum pressure adjustment on the pump controller
and loosen the jam nut.
2. Install articulation lock bar to prevent accidental steering of the unit. Start the
diesel engine and place the unit into “Drive” mode.
3. Install a pressure gauge to the test point “TEST1” on the hydraulic control
manifold.
4. Switch Carrier to “Aux” mode. This will cause the pump to switch to full pressure
(rather than load sense in “Drive” mode).
5. Turn the maximum pressure adjustment CW to increase and CCW to decrease
until the pressure gauge reads 3000 psi.
6. Lock the adjustment with the jam nut and re-install the cap.
MB-HYD1461 Page 3 of 18
--- Page 44 ---
BI621993
Title: Setup Guide, Hydraulic
Number: MB-HYD1461
Revision: Original
The respective pressure limiters can be adjusted using the following procedure:
Drill Impact Valve (single pressure limiter)
1. Disconnect the drill impact hose at a convenient location (at the drill, at a
bulkhead) and plug the hose.
2. Start the appropriate AC powerpack and switch to “Aux” mode.
3. Using the appropriate drill control joystick press and hold the “hi impact override”
button. The drill impact should be operating at high pressure and this can be
observed on the gauge in front of the boom control console. If the gauge reads
2500 psi no adjustment is required.
4. Remove the cap from the “A” pressure limiter adjustment and loosen the jam nut.
5. Turn the pressure limiter adjustment CW to increase and CCW to decrease until
the gauge reads 2500 psi.
6. Lock the adjustment using the jam nut and re-install the cap.
7. Reconnect the hoses.
Drill Feed Valve (dual pressure limiters)
1. Turn the adjustment of feed regulator fully CW.
2. Start the appropriate AC powerpack or diesel engine and switch to “Aux” mode.
3. Using the appropriate drill control joystick move and hold the feed fully forward
and observe the feed pressure on the gauge in front of the boom control console.
If the gauge reads 1600 psi no adjustment is required.
4. Remove the cap from the “A” pressure limiter adjustment and loosen the jam nut.
5. Turn the pressure limiter adjustment CW to increase and CCW to decrease until
the gauge reads 1600 psi.
6. Lock the adjustment using the jam nut and re-install the cap.
7. Repeat steps 3 through 9 for the “B” pressure limiter by holding the feed in the
fully reversed position. A pressure gauge must be connected to the “W” port of
the drill feed valve section. Set the pressure limiter to 2500 psi.
Drill Rotation Valve
1. Turn off the anti-jam system using the anti-jam enable toggle switch on the boom
control console.
2. Disconnect both of the drill rotation hoses at a convenient location (at the drill, at
a bulkhead) and plug the hoses.
3. Start the appropriate AC powerpack and switch to “Aux” mode.