PDF Operation & Maintenance Manual Caterpillar MD6750 Blast Hole Drill - 2 MB
This comprehensive operation and maintenance manual is specifically for the Caterpillar MD6750 Blast Hole Drill.
It provides operators and maintenance personnel with crucial information on safety, machine controls, and regular service procedures.
Adhering to the guidelines in this manual is key to ensuring the longevity and optimal performance of your drill.
This document covers everything needed to operate the machine efficiently and maintain it to the highest standards.
It is an indispensable guide for any team working with the MD6750.
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BI012515
Operation and
Maintenance
Manual
MD6750 Blast Hole Drill
Serial Number DR711136 / 2Z71A16
SAFETY.CAT.COM
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1-3
Introduction Section
BI012515_EN MD6750 Blasthole Drill
Section 1
Introduction
GENERAL INFORMATION
This manual is designed to assist the owner in the operation of this machine. By following easy to
understand step-by-step procedures, the operators and maintenance personnel can perform all
tasks in a safe manner. When a systematic and thorough maintenance/service procedure is used
for this machine, a minimum of unplanned downtime and more reliable operation will result.
Safe operation of the machine minimizes production delays and costly damage to equipment. Carefully
study and follow all recommended procedures in this manual. Safety guidelines are intended to
prevent accidents from occurring and are provided in the interest of all mine personnel. Overall
safety depends upon the use of good judgment and the alertness of the entire mining crew.
Throughout this manual, the use of the terms “LEFT, RIGHT, FRONT, and REAR” refer to machine
locations as viewed by the operator sitting in the operator’s seat in the cab.
THIS MANUAL IS NOT THE PARTS BOOK, and cannot be used as reference material to order
parts. A separate, detailed parts book has been supplied for this purpose.
Periodic additions or revisions may be made to this manual. Should you require additional information
or factory service assistance, contact your regional service representative or:
Caterpillar Global Mining, LLC
Mining Products Division
3501 S FM 1417
Denison, TX 75020
903-786-9621
The company reserves the right to make changes or add improvements to its machines at any
time. This will be without incurred obligations to install such changes on machines sold previously.
Due to this ongoing program of product research and development, some procedures, specifications
and parts may be altered in a constant effort to improve our machines.
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Introduction Section
BI012515_EN MD6750 Blasthole Drill
Stored Energy Signs
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1-23
Introduction Section
BI012515_EN MD6750 Blasthole Drill
Weight Ea.
Qty. (Lbs.)
Box, Pipe Handling ............................................................. 1 .......................... 145
Box, Bit Handling ................................................................ 1 ............................ 60
Extender, Drill Pipe ............................................................. 1 ....................... 1,700
Cylinder, Tool Wrench ........................................................ 2 .......................... 470
Dust Curtain ...................................................................... 18 ........................... 10
Dust Seal ........................................................................... 1 ............................ 20
Cone, Chip Deflector .......................................................... 1 .......................... 110
Stairway, Boarding ............................................................. 1 .......................... 270
Cable Reel Assembly ......................................................... 1 ....................... 6,600
Reducer, Right Angle .................................................... 1 ............................ 50
Arm, Upper Support ...................................................... 2 ............................ 50
Collector Rings, Cable Reel ......................................... 1 .......................... 185
Machinery House
Wall, Machinery House R.H. .............................................. 1 ....................... 3,000
Wall, Machinery House Front ............................................. 1 ....................... 1,000
Extension, Left ................................................................... 1 ..................... 10,000
Cove, Hydraulic .................................................................. 1 ....................... 1,800
Panel, Center Roof............................................................. 1 .......................... 710
Panel, Rear Roof ............................................................... 1 .......................... 670
Wall, Machinery House Left ................................................ 1 ....................... 1,700
Door, Service, Machy House, 30” ...................................... 2 .......................... 170
Door, Service, Machy House, 34” ...................................... 2 .......................... 300
Door & Frame Assy, L.H. .................................................... 1 .......................... 250
Door, LH Extension (large) ................................................. 2 .......................... 285
Door, LH Extension (small) ................................................. 1 .......................... 145
Hatch, Pressurization Unit Roof ......................................... 1 .......................... 375
Enclosure, Dynavane Bleed Fan ........................................ 1 .......................... 275
Duct, Pressurization Unit Transition ................................... 1 .......................... 280
Duct, Upper Bleed Fan Discharge ...................................... 1 ............................ 90
Duct, Lower Bleed Fan Discharge ...................................... 1 .......................... 100
Shroud, Pressurization Unit Rain ....................................... 1 .......................... 120
Filter, Air/Bleed Air Duct ...................................................... 1 ....................... 1,000
Fan, Vane Axial ................................................................... 1 .......................... 825
Blower & Motor .................................................................. 1 .......................... 230
Operator Cab Structure ...................................................... 1 ....................... 5,000
Hatch, Bit View ................................................................... 1 .......................... 180
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2-9
Operation Section
BI012515_EN MD6750 Blasthole Drill
HOIST/PULLDOWN RHEOSTAT
The hoist/pulldown rheostat (1) controls the speed and direction of the hoist-pulldown motor for
hoisting or lowering the rotary drive unit.
Turning the rheostat in the hoist direction from the “0” position will raise the rotary drive unit. Maximum
speed is available at full clockwise position.
Turning the rheostat in the pulldown direction from the “0” position will lower the rotary drive unit.
Maximum speed is available at full counterclockwise position.
NOTE: The rheostat utilizes a reference scale and pointer. When the rheostat is turned, the
pointer indicates, on the reference scale, the relative percentage of full speed being set.
ROTARY RHEOSTAT
The rotary rheostat (2) controls the speed and direction of the rotary motor which in turn drives the
machinery to rotate the tool string.
Turning the rheostat clockwise from the “0” position will turn the tool string in a clockwise direction.
Maximum rotary speed is achieved at full clockwise position.
Turning the rheostat counterclockwise from the “0” position will turn the tool string in the reverse
direction. Maximum rotary speed is achieved at full counterclockwise position.
NOTE: The rheostat utilizes a reference scale and pointer. When the rheostat is turned, the
pointer indicates, on the reference scale, the relative percentage of full speed being set.
DRILL/PROPEL CONTROLS ON AND OFF PUSHBUTTON
The drill/propel controls on (3) and off (4) push-buttons are used to energize or de-energize the
control levers and switches of the machine.
When the operating mode selector switch is in the DRILL position, depressing the ON pushbutton
will energize the hoist/pulldown and rotary drives if all appropriate circuit breakers are closed; no
drive or power system faults exist, and master switches are in NEUTRAL.
When the operating mode selector switch is in the PROPEL position, depressing the ON pushbutton
will enable the propel controls if all appropriate circuit breakers are closed, compressor motor is
operating normally, and no power system faults exist.
When the operating mode selector switch is in the REMOTE position the ON and OFF push-buttons
are not functional.
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2-19
Operation Section
BI012515_EN MD6750 Blasthole Drill
LEVELING CONTROL PANEL
Leveling Control Panel
The leveling portion of the panel consists of four two-directional joysticks, one for each leveling jack
cylinder and an automatic leveling switch.
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2-29
Operation Section
BI012515_EN MD6750 Blasthole Drill
MACHINE START-UP
Start-up of this machine is a very important operation. Improper start-up could cause various safety
and operating difficulties as well as damage to the machine. Following the step-by-step procedure
listed below to start the machine will help reduce the possibility of accidental injury or machine
damage.
NOTE: The machine is to be started only after the prestart inspection and lubrication as detailed
earlier in this section, have been completed.
1. Go into the operator’s cab and verify that all controls on the operator’s console are in the off or
neutral position. Be sure that the EMERGENCY STOP pushbutton is in the pulled-up position.
NOTE: On some machines there are two or more Emergency Stop push-buttons. Be sure ALL
Emergency Stop push-buttons are in the RELEASED (UP) position.
2. Go to the machinery house to the low voltage start cabinet. Turn ON the main compressor
breaker.
3. On the low voltage cabinet turn all the breakers to the ON position.
4. On the programmable controller cabinet verify that the lockout control pushbutton is in the
RELEASED position. Turn the house pressurization fan switch to the desired operating position.
Verify that the operator’s display terminal power supply, PLC input and PLC output breakers
are in the ON position,
5. Press the air compressor start pushbutton on the programmable controller cabinet to start the
main compressor.
NOTE: If the ambient temperature is below 32°F (0°C), the machine will normally use special
fluids in the hydraulic system and/or heaters for the system.
When the machine is shutdown, temporarily or for an extended time, power should be left on the
machine to maintain heater operation. If power is removed at shutdown, the machine fluids should
be warmed to at least 32°F (0°C) before attempting to start the machine.
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Operation Section
BI012515_EN MD6750 Blasthole Drill
MACHINE OPERATION
Operation of the machine is, in principle, the same as the operation of any other machine. But just
because the machines operate using the same in principles does not mean they operate the same in
all respects. For this reason it is important that the operator become familiar with the particular
machine that is being operated.
The purpose of this section of the operator’s manual is to detail the procedures involved in operating
many of the major components and preparing to drill a hole. The actual drilling procedure is detailed
later within this section.
Become familiar with the controls and learn to operate at reduced speeds. As the machine and
drilling cycle become more familiar, increase speeds gradually to the full operating capability of the
machine.
The most important reason to operate slowly at first is safety. Operating at full speed means that
things happen quickly, perhaps more quickly than expected. This unexpected operation of equipment
can very easily lead to an accident.
For the purpose of this manual, we will assume that the drill has been left in the proper condition for
operating. If this is not the case, complete the prestart checks and start the machine using the
procedures as outlined.
PROPELLING
“Listing” is a machine geometry condition which can occur on vehicles which have a pivotal axle
and a fixed axle. It is that condition when the upper works is tilting over onto the pivotal axle, lifting
one side of the fixed axle.
“Tipping” is defined as the point of impending overturning. A machine can tip to the rear without
listing first. Under all other conditions, the machine will “list” before tipping.
“Maneuvering slope” is the grade on which the machine can be propelled in any direction without
listing or tipping.
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Operation Section
BI012515_EN MD6750 Blasthole Drill
Controls for Leveling the Machine
MAST RAISING AND LOWERING
The mast is normally left in the raised position for most situations including propelling from hole to
hole on a blast pattern. Lowering the mast is necessary under three conditions:
1. Maintenance work is not possible or too dangerous to perform with the mast up.
2. Long moves over 1,000 feet (304 m) where the drill will be towed into position, propelled at
high speed, or be loaded onto a trailer.
3. Any situation when steep slopes are encountered. Contact Caterpillar Global Mining Service
Department if unsure of slope limitation for propelling.
MAST RAISING
CAUTION: Raising or lowering the mast is a two-person job. Do not attempt to
raise or lower the mast without the assistance of a helper familiar with
the procedures involved.
CAUTION: During the mast raising procedure personnel should be kept clear of
the machine and the area immediately surrounding the machine,
especially the front of the machine. No one is to be allowed on the
mast, operator’s cab roof, or machinery house roof while the mast is
in the air. Failure to heed this caution may result in the death or
serious injury of personnel struck by the mast should it fall for some
reason.
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2-59
Operation Section
BI012515_EN MD6750 Blasthole Drill
TOOL HANDLING
This section describes the procedures necessary to load, unload, handle, assemble and disassemble
the drill tools.
The procedures detailed in this section are intended to be as universally applicable as possible. It is,
however, impossible to prepare a procedure that will take into account every possible machine
option or tool vendors’ products. For this reason it is important that the operator not only become
familiar with these procedures, but with the machine and the particular tools being handled.
PIPE LOADING AND UNLOADING
Loading pipe onto the drill is necessary when the drill is new and has not yet had the pipe installed
or when the pipe has been removed for change out or for maintenance to the mast. The procedure
in this manual, unlike some more commonly used procedures, requires that the mast be in the
horizontal or lowered position to load the drill pipe. This is necessary for safety.
This procedure, while not the most expedient for machines requiring pipe change out while the mast
is in the drilling position, is quite efficient while the mast is in the stored position. Proper scheduling
of maintenance and production requirements against pipe life will allow using this procedure while
reducing the downtime of the machine.
CAUTION: Limitations exist as to the length, diameter, wall thickness and
number of drill pipes that may be stored in the tool racks when raising
or lowering the mast. Refer to the pipe size limitation chart in the
appendix of this manual before loading pipe onto the machine with
the mast down and before raising or lowering the mast. Failure to
comply with these limitations will overload the mast, mast support
and hydraulic system possibly causing loss of control of the mast.
Refer to the appendix of this manual for an alternate method of
loading and unloading pipe from the machine in order to comply with
the mast raising and lowering limitations.
To load drill pipe onto the drill, proceed as follows:
1. If the mast is in the vertical or drilling position, lower the mast and store it in the mast rests.
Refer to the appropriate topic in this manual for the exact operating procedures.
2. Obtain a crane with suitable capacity and reach to place the drill pipe into the pipe racks with
the mast in the stored position. Normal placement of the crane is on the left side of the drill
since this allows the shortest reach and greatest boom angle.
CAUTION: Follow all applicable safety measures when working with cranes and
rigging. Failure to follow safe working procedures can cause an
accident, leading to the possible death or injury of personnel.
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2-69
Operation Section
BI012515_EN MD6750 Blasthole Drill
4. After selecting the pipe rack to be used by turning the pipe rack selector switch to #l or #4,
swing the pipe rack over the hole. Then return the joystick to the NEUTRAL position.
5. Slowly lower the rotary/pulldown unit and place the lower end of the pipe into the pipe rack
pocket. Make sure that the pipe is seated firmly on the bottom of the pocket.
6. Quickly turn the rotary rheostat to the left (counterclockwise) to approximately one-half of full
speed. The joint should break at the rotary coupling.
NOTE: If the joint does not break immediately, return the rotary rheostat to the zero position to
reduce the chance of damaging the motor by stalling it.
7. If the joint does not break, it will be necessary to index the slots on the drill pipe so as to allow
the rotary drive unit to build up speed before stopping the drill pipe. This is done by rotating
the drill pipe in the forward direction until the slots in the pipe are almost aligned with the pawls
in the sockets. This allows the drill pipe to rotate almost one-half turn before being stopped by
the pawls.
After indexing the pipe to allow the one-half turn rotation, repeat step 6 above to break the joint.
Repeat this procedure as many times as is necessary to break the joint.
8. When the joint breaks, gently raise the rotary/pulldown unit as the joint is unscrewing.
9. When the joint completely unscrews, the pipe will drop to the bottom of the pipe rack pocket.
The upper gate will automatically close around the drill pipe. When the joint is completely
unscrewed, raise the rotary/pulldown unit until it is in a position so as not to be struck by the
pipe rack when it is moved. Set the hoist brake.
10. Swing the pipe rack into the stored position.
To remove the stabilizer, proceed as follows;
1. With the stabilizer still clamped in the tool wrenches, attach a lifting bell to the upper end of the
stabilizer. Attach the auxiliary winch line to the lifting bell and lift the stabilizer and guide bushing
from the hole in the drill deck. Block the assembly in a horizontal position.
2. Remove the auxiliary winch line from the stabilizer. Remove the guide bushing from the stabilizer
and replace the auxiliary winch line.
3. Using the auxiliary winch line, remove the stabilizer from the drill. Replace the guide bushing
in the hole in the deck.
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Operation Section
BI012515_EN MD6750 Blasthole Drill
Leave the air on and the tool string turning at 25-30 RPM. When the bit reaches the point where the
cuttings have accumulated on the bottom of the hole, these cuttings will be forced out of the hole.
When the cuttings have been cleaned out of the bottom of the hole, the bit will contact the undrilled
formation at the bottom of the hole and stop penetrating. Once the flow of cuttings out of the hole
stops and the tool string stops penetrating, the hole is clean.
4. After cleaning the hole the tool string may be raised to the top. Turning the hoist/pulldown
rheostat control in the HOIST direction and the hoist/pulldown speed selector switch in the
HOIST HIGH position will hoist the tool string.
ENDING THE HOLE (MULTIPLE PIPE SECTIONS)
Reaming the hole with multi-section tool strings is the same as reaming with single pipe section
strings. The reaming procedure must be done in stages as the pipe sections are removed.
While removing the drill pipe the cuttings dislodged from the sides of the hole and the cuttings
generated by reaming will fall to the bottom of the hole. To effectively clean the hole, it would be
necessary to reassemble the tool string and lower it to the bottom of the hole. This is not desirable
as it is time consuming. One method to eliminate the need to clean the hole is to overdrill the depth
and allow cuttings to fill the hole to the desired finishing depth. Experience in this area will show how
much to overdrill the hole. A good practice is to overdrill the hole by 1 to 2 feet (0.3 to 0.6 m) over the
estimated finished hole depth. This way, if the estimate is wrong, the hole will be 1 to 2 feet (0.3 to
0.6 m) too deep. This can easily be corrected by a few shovels full of cutting thrown into the hole.
Underestimating, on the other hand will require that the tool string be reassembled and the hole
cleaned.
DRILLING DIFFICULT FORMATIONS
For the purpose of explanation, the drilling procedure given in the Drilling section of the manual
assumes that drilling takes place in consistent, consolidated rock formation. Unfortunately, not all
drilling is in this type of formation. This section of the Operator’s Manual will detail, in general, some
typical drilling difficulties encountered.
The main cause of difficult drilling are unconsolidated material or wet sticky material. Unconsolidated
material causes vibration far greater than experienced in consolidated formation, and if severe
enough, may also decrease the bailing velocity of the main air stream. Wet, sticky material causes
problems with cleaning the hole since the material may coat the hole and the drill pipe, increasing
the air pressure above the working range. Wet material may also plug the bit orifices, freeze the bit
cones, or compact into balls that refuse to be bailed out of the hole. The general procedure for
drilling in difficult formations is the same as the procedure for drilling in good formations. The hole is
collared, drilled, reamed, and cleaned using the standard operating procedures. Monitoring of the
machine is, however, critical while drilling in difficult formations.
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Operation Section
BI012515_EN MD6750 Blasthole Drill
6. Inspect the air compressor for signs of wear or damage. Make note of any damage discovered.
7. If the air compressor motor is equipped with anti-condensation heaters, turn them on at this
time. If the motor is not equipped with heaters, have a qualified electrician install heaters or a
suitable substitute. Cover the motor with a waterproof tarp or cover.
8. Close and lock all electrical cabinet doors.
9. Fill the radiator to the top with the proper oil on machines equipped with screw compressors.
10. Manually cycle the auto lube system to verify that all points on the machine are receiving
lubricant. Repair the system as necessary to lube all points.
11. Lube all manual lube points.
12. Clean the dust hoppers on the dust control system if required.
13. Close and lock all windows and doors.
LONG TERM STORAGE
Long term storage procedures are necessary any time the machine is to be left for a period exceeding
3 weeks. Long term storage includes all procedures necessary for short term storage, and depending
on the situation, some additional precautions.
There are two procedures involved in long term storage of the drill, the choice of which depends
upon whether the machine can be attended to while in storage. If the machine can be started and
the majority of the machinery operated once a month during the storage period, much less protective
work is necessary. If the machine must remain unattended, special precautions are necessary to
prevent damage to the machine.
NOTE: If the machine is to be unattended during the storage procedure the procedures
necessary to store the machine properly will take considerable time and restoring the
machine to production will take even longer. Do not utilize the unattended long term
storage procedure unless absolutely necessary.
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3-3
Lubrication Section
BI012515_EN MD6750 Blasthole Drill
Section 3
Lubrication
LUBRICATION PRINCIPLES
The proper lubrication of this machine is vital to its successful, continued operation. Application of
the CORRECT lubricant in the CORRECT amount at the CORRECT place as part of a PROVEN
maintenance program is required to keep the machine operating at a level of productivity. Proper
lubrication will provide better component service life with a reduction of repairs and downtime. When
not properly lubricated, moving parts wear quicker and fail sooner.
The primary wear items of this machine are lubricated by an automatic system that dispenses lube
to selected points at pre-selected, timed intervals during machine operation. This system is covered
in more detail further on in this section. It is important to the operation of this automatic lube system
that you become familiar with it and understand its operation in order to properly maintain and
service it, thus keeping it operable. It is also necessary that you inspect on a regular basis the
points for automatic lubricant application to insure the system is performing its job adequately.
Some components, due to their location and function, can not be readily covered by the automatic
lube system. You should become familiar with these points so you can service them properly at the
intervals listed. A listing of the parts covered by the automatic lubrication system is included later in
this section. The standard lubrication fittings used for manual service are the hydraulic type, push-
on fittings having 1/8 inch or 1/4 inch NPT threads.
Bushings and bearings operating in a highly contaminated atmosphere (dust, grit, etc.) should be
lubricated until clean grease seeps out around the journal or seal, or comes out the purge fitting, if
one is provided.
Overfilling an anti-friction bearing can cause it to run excessively warm. After lubricating anti-friction
bearings (those that are sealed such as in electric motors must use electric motor grease) remove
the pressure fitting, or the relief plug when provided, allowing the bearing to purge itself of any
excess lube during the first 10-15 minutes of operation. Replace the fitting or plug after that time.
Grease in a bearing generally deteriorates gradually, not suddenly. Only a small amount needs to
be added to it at regular intervals to maintain the proper lubricant level. Adding a small quantity of
grease to the bearing every 600 operating hours, unless otherwise specified, is adequate.
Open gears and pinions require a constant coating of high grade lubricant which is specified for
operation. Inspect all open gear sets at least once daily (every 24 hours) to ensure they are coated
with OGL.
CAUTION: Contact with or ingestion of petroleum products can be harmful.
Automatic lubrication systems operate under pressure. Before
opening any lube supply line, relieve the system and that line in
particular, of any residual pressure.
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3-13
Lubrication Section
BI012515_EN MD6750 Blasthole Drill
PUMP DISASSEMBLY PROCEDURE
1. Remove and separate manifold (37) from the hydraulic motor (42).
2. Remove the pipe plug (45) and drain the crank case oil from the pump housing (46).
3. Remove the housing cover (30) and cover gasket (31).
4. Remove the retaining ring (57) and pull the shovel plug (56) from the housing tube (55).
5. Remove and separate the hydraulic motor (42) from the pump housing (46).
6. Remove the 2 outlet pin nuts (50) from the pump housing (46).
7. Remove the pump sub-assembly (1-28) from the pump housing (46). Pushing the sub-assembly
up with a wooden or plastic rod .75 inch O.D. against the check seat housing (28) is helpful.
8. Remove the housing tube (55) from the pump housing (46) by inserting a .75 inch O.D. rod
through the inlet holes at the bottom of the housing tube (55) and unscrewing it.
9. Remove the bronze bearing (51), o-ring (52) and back-up washer (53) from the housing tube
(55).
10. Remove the crankrod assembly (1-8) from the pump by unscrewing the screws (12) and then
pulling out the wrist pin bushings (13).
11. Remove the check seat housing (28) from the reciprocating tube (21).
12. Unscrew the wrist pin anchor (14) from the reciprocating tube (21) and pull the plunger assembly
(9-20) from the tube.
13. Using a .50 inch O.D. rod, push the cup seal (22) and pump cylinder (24) from the reciprocating
tube (21).
14 Remove the pump plunger (20) from the plunger link rod (17). A spanner wrench is required.
15. Unscrew the plunger link rod (17) from the plunger tube (11) and slide off the cup seal (16),
back-up washer (15) and the wrist pin anchor (14).
16 Unscrew the plunger tube (11) from the outlet pin (9).
17. To dismantle the crankrod assembly (1-8), remove the screws (1) and counter weights (2).
18. Remove the retaining rings (6) and press the crank eccentric (7) out of the ball bearing (8). Be
sure to support the ball bearing (8) on the inner race.
--- Page 17 ---
3-23
Lubrication Section
BI012515_EN MD6750 Blasthole Drill
NOTE: The above frequencies are for manual lubrication. When the machine is equipped with
automatic lube systems, the frequencies are set at the lube control station. At initial start-
up of a new machine with an automatic lube system, the injectors should be set at full
opening then readjusted as required.
Lubrication - Mast, View 1
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Lubrication Section
BI012515_EN MD6750 Blasthole Drill
PAO SYNTHETIC HYDRAULIC FLUID
The following bar graph shows recommended viscosity grades for SHC hydraulic oil for various
ambient temperatures. For temperatures outside of these ranges, contact the Caterpillar Global
Mining Department for recommended oil.
Recommended Viscosity vs. OAT Chart
PARAFFINIC BASE PETROLEUM HYDRAULIC FLUID
Approved oils will typically have Denison HF-O specification certification. In general, the oils will
meet the following minimum requirements:
1. Maximum Viscosity = 14,000 SUS (3,000 CST) at the minimum expected ambient
temperature (for start-up).
CAUTION: Starting with viscosities greater than 3,000 CST could void warranty.
2. Minimum Viscosity = 65 SUS at the maximum operating temperature of the hydraulic
system.
3. Ideal Viscosity = 100 SUS at normal operating temperature of the hydraulic system.
4. Minimum Viscosity Index = 90
5. Neutralization Number = 10 or less for new oil.
--- Page 19 ---
Bucyrus International, Inc.
SPECIFICATION FOR
ENCLOSED GEARCASE LUBRICANT
SD4722 (June 26, 2006)
Applicable to Models 33HR, 35HR, 37HR, 39HR, 49HR and 59HR Rotary Blasthole
Drills.
SCOPE:
This specification covers the requirements for “Enclosed Gearcase Lubricant” used on
models 33HR, 35HR, 37HR, 39HR, 49HR and 59HR Rotary Blasthole Drills.