Cat 966C Operation Manual

Operation

Maintenance
Manual

966C WHEEL LOADER

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Product: WHEEL LOADER
Model: 966C WHEEL LOADER 9KC
Configuration: 966C WHEEL LOADER / POWER SHIFT / 9KC00001-UP

(MACHINE) POWERED BY 3306 ENGINE

Operation and Maintenance Manual

966C AND 966R WHEEL LOADERS

Media Number -SEBU6290-00 Publication Date -01/02/1990 Date Updated -11/10/2001

Foreword

This manual contains safety, operation, transportation, lubrication and maintenance information.

Some photographs or illustrations in this publication show details or attachments that may be different from your
machine. Guards and covers may have been removed for illustrative purposes.

Continuing improvement and advancement of product design may have caused changes to your machine which
are not included in this publication. Read-study-and keep it with the machine.

Whenever a question arises regarding your machine, or this publication, please consult your Caterpillar dealer
for the latest available information.

Safety

The safety section lists basic safety precautions. In addition, this section identifies the text and locations of
warning labels used on the machine.

Read and understand the basic precautions listed in the safety section before operating or performing lubrication,
maintenance and repair on this product.

Operation

The operation section is a reference for the new operator and a refresher for the experienced one. This section
includes a discussion of gauges, switches, machine controls, attachment controls, transportation and towing
information.

Photographs and illustrations guide the operator through correct procedures of checking, starting, operating and
stopping the machine.

Operating techniques outlined in this publication are basic. Skill and techniques develop as the operator gains
knowledge of the machine and its capabilities.

Maintenance

The maintenance section is a guide to equipment care. The illustrated, step-by-step instructions are grouped by
servicing intervals. Items without specific intervals are listed under "When Required" topics. Items in the
"Maintenance Intervals" chart are referenced to detailed instructions that follow.

Maintenance Intervals

Use the service hour meter to determine servicing intervals. Calendar intervals shown (daily, weekly, monthly,
etc.) may be used instead of service hour meter intervals if they provide more convenient servicing schedules
and approximate the indicated service hour meter reading. Recommended service should always be performed at
the interval that occurs first.

Under extremely severe, dusty or wet operating conditions, more frequent lubrication than is specified in the
"Maintenance Interval" chart may be necessary.

Perform service on items at multiples of the original requirement. For example, at "Every 500 Service Hours or
3 Months", also service those items listed under "Every 250 Service Hours or Monthly", "Every 50 Service
Hours or Weekly" and "Every 10 Service Hours or Daily."

Machine Description

This rubber tired bucket machine is equipped with a Caterpillar 3306 diesel engine. The primary use of this
machine is for moving material.

Copyright 1993 - 2022 Caterpillar Inc.
All Rights Reserved.
Private Network For SIS Licensees.

Mon Dec 19 2022 17:26:28 GMT+0700 (Indochina Time)

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Product: WHEEL LOADER
Model: 966C WHEEL LOADER 9KC
Configuration: 966C WHEEL LOADER / POWER SHIFT / 9KC00001-UP

(MACHINE) POWERED BY 3306 ENGINE

Operation and Maintenance Manual

966C AND 966R WHEEL LOADERS

Media Number -SEBU6290-00 Publication Date -01/02/1990 Date Updated -11/10/2001

Safety

Warning Signs and Labels

There are several specific safety signs on your machine. Their exact location and description of the hazard are
reviewed in this section. Please take the time to familiarize yourself with these safety signs.

Make sure that you can read all safety signs. Clean or replace these if you cannot read the words or see the
pictures. When cleaning the labels use a cloth, water and soap. Do not use solvent, gasoline, etc.

You must replace a label if it is damaged, missing or cannot be read. if a label is on a part that is replaced, make
sure a new label is installed on the replaced part. See your Caterpillar dealer for new labels.

Do not operate or work on the machine unless you have read and
understand the instructions and warnings in the Operations and
Maintenance Manual. Failure to follow the instructions or heed the
warnings could result in injury or death. Contact any Caterpillar dealer
for replacement manuals. Proper care is your responsibility.

Located in the cab.

Structural damage, an overturn, modification, alteration, or improper
repair can impair this structure's protection capability thereby voiding
this certification. Consult a Caterpillar dealer to determine this
structure's limitations without voiding its certification.

Located on the ROPS or FOPS.

Improper jumper cable connections can cause an explosion resulting in
personal injury. Batteries in series may be located in separate
compartments. When using jumper cables always connect positive (+)
cable to positive (+) terminal of battery connected to starter solenoid
and negative (-) cable from external source to starter negative (-)
terminal. (If not equipped with starter negative terminal, connect to
engine block.)

Located in the battery compartment.

No clearance for man in this area when machine turns; Severe injury or
death from crushing could occur.

Connect steering frame lock link between front and rear frames before
lifting machine, transporting machine on another vehicle, or
performing service near center of machine.

Disconnect steering frame lock link and secure to retaining plates before
resuming operation or machine will not steer.

Located on the machine at the center pivot.

General Hazard Information

Attach a "DO NOT OPERATE" or similar warning tag to start switch or controls before servicing or repairing
the machine. These tags, Form SEHS7332, are available from your Caterpillar dealer.

Wear a hard hat, protective glasses and other protective equipment as required by job conditions.

Do not wear loose clothing or jewelry that can catch on controls or other parts of the machine.

Make certain all protective guards and covers are secured in place on the machine.

Keep the machine, especially the deck, walkways and steps, free of foreign material, such as debris, oil, tools
and other items which are not part of the machine.

Secure all loose items such as lunch boxes, tools and other items which are not part of the machine.

Know the appropriate work-site hand signals and who gives them. Accept signals from one person only.

Never put maintenance fluids into glass containers.

Use all cleaning solutions with care.

Report all needed repairs.

Do not allow unauthorized personnel on the machine.

Perform all maintenance unless otherwise specified as follows:

* The machine parked on level ground.
* The bucket controls in HOLD.
* The transmission control in NEUTRAL.
* The parking/secondary brake engaged.
* The engine stopped.
* The key start switch off and the key removed.
* The disconnect switch off and the key removed.

Pressure Air

Pressure air can cause personal injury. When using pressure air for cleaning, wear a protective face shield,
protective clothing and protective shoes.

The maximum air pressure must be below 205 kPa (30 psi) for cleaning purposes.

Fluid Penetration

Always use a board or cardboard when checking for a leak. Escaping fluid under pressure, even a pin-hole size
leak, can penetrate body tissue, causing serious injury, and possible death. If fluid is injected into your skin, it
must be treated by a doctor familiar with this type of injury immediately.

Asbestos Information

Caution should be used to avoid breathing dust that may be generated when handling components containing
asbestos fibers. If this dust is inhaled, it can be hazardous to your health. Components in Caterpillar products
that may contain asbestos fibers are brake pads, brake band and lining assemblies, clutch plates and some
gaskets. The asbestos used in these components is usually bound in a resin or sealed in some way. Normal
handling is not hazardous as long as airborne dust which contains asbestos is not generated.

If dust which may contain asbestos is present, there are several common sense guidelines that should be
followed.

* Never use compressed air for cleaning.
* Avoid brushing or grinding of asbestos containing materials.
* For clean up, use wet methods or a vacuum equipped with a high efficiency particulate air (HEPA) filter.
* Use exhaust ventilation on permanent machining jobs.
* Wear an approved respirator if there is no other way to control the dust.
* Comply with applicable rules and regulations for the work place (for example in the U.S.A., OSHA

requirements as set forth in 29 CFR 1910.1001).

* Follow environmental rules and regulations for disposal of asbestos.
* Avoid areas where asbestos particles may be in the air.

Crushing or Cutting Prevention

Support equipment and attachments properly when working beneath them. Do not depend on hydraulic cylinders
to hold it up. Any attachment can fall if a control is moved, or if a hydraulic line breaks.

Never attempt adjustments while the machine is moving or the engine is running unless otherwise specified.

Where there are attachment linkages, the clearance in the linkage area will increase or decrease with movement
of the attachment.

Stay clear of all rotating and moving parts.

Keep objects away from moving fan blades. They will throw or cut any object or tool that falls or is pushed into
them.

Do not use a kinked or frayed wire rope cable. Wear gloves when handling the wire rope cable.

Retainer pins, when struck with force, can fly out and injury nearby persons. Make sure the area is clear of
people when driving retainer pins.

Wear protective glasses when striking a retainer pin to avoid injury to your eyes.

Chips or other debris can fly off objects when struck. Make sure no one can be injured by flying debris before
striking any object.

Rollover Protective Structure (ROPS) or Falling Objects Protective Structure (FOPS) - (If Equipped)

This is an attached guard located above the operator's compartment and secured to the machine.

To avoid possible weakening of the Rollover Protective Structure (ROPS) or Falling Objects Protective
Structure (FOPS), consult a Caterpillar dealer before altering the ROPS (FOPS) in any way. The protection
offered by this ROPS (FOPS) will be impaired if it has been subjected to structural damage. Structural damage
can be caused by an overturn accident, by falling objects, etc.

Burn Prevention

Coolant

At operating temperature, the engine coolant is hot and under pressure. The radiator and all lines to heaters or
the engine contain hot water or steam. Any contact can cause severe burns.

Steam can cause personal injury.

Check the coolant level only after the engine has been stopped and the filler cap is cool enough to remove with
your bare hand.

Remove the cooling system filler cap slowly to relieve pressure.

Cooling system additive contains alkali that can cause personal injury. Avoid contact with the skin and eyes and
do not drink.

Allow cooling system components to cool before draining.

Oils

Hot oil and components can cause personal injury. Do not allow hot oil or components to contact the skin.

At operating temperature, the hydraulic tank is hot and can be under pressure.

Remove the hydraulic tank filler cap only after the engine has been stopped and the filler cap is cool enough to
remove with your bare hand.

Remove the hydraulic tank filler cap slowly to relieve pressure.

Relieve all pressure in air, oil, fuel or cooling systems before any lines, fittings or related items are disconnected
or removed.

Batteries

Batteries give off flammable fumes which can explode.

Do not smoke when observing the battery electrolyte levels.

Electrolyte is an acid and can cause personal injury if it contacts skin or eyes.

Always wear protective glasses when working with batteries.

Fire or Explosion Prevention

All fuels, most lubricants and some coolant mixtures are flammable.

Fuel leaked or spilled onto hot surfaces or electrical components can cause a fire.

Do not smoke while refueling or in a refueling area.

Do not smoke in areas where batteries are charged, or where flammable materials are stored.

Batteries in series may be located in separate compartments. When using jumper cables always connect positive
(+) cable to positive (+) terminal of battery connected to starter solenoid and negative (-) cable from external

source to starter negative (-) terminal. (If not equipped with starter negative terminal, connect to engine block.)

See the "Operation Section" of this manual for specific starting instructions.

Clean and tighten all electrical connections. Check daily for loose or frayed electrical wires. Have all loose or
frayed electrical wires tightened, repaired or replaced before operating the machine.

Keep all fuels and lubricants stored in properly marked containers and away from all unauthorized persons.

Store all oily rags or other flammable material in a protective container, in a safe place.

Do not weld or flame cut on pipes or tubes that contain flammable fluids. Clean them thoroughly with
nonflammable solvent before welding or flame cutting on them.

Remove all flammable materials such as fuel, oil and other debris before they accumulate on the machine.

Do not expose the machine to flames, burning brush, etc., if at all possible.

Shields, which protect hot exhaust components from oil or fuel spray in the event of a line, tube or seal failure,
must be installed correctly.

Have a fire extinguisher available and know how to use it. Inspect and have it serviced as recommended on its
instruction plate.

Ether

Ether is poisonous and flammable.

Breathing ether vapors or repeated contact of ether with skin can cause personal injury.

Use ether only in well ventilated areas.

Do not smoke while changing ether cylinders.

Use ether with care to avoid fires.

Do not store replacement ether cylinders in living areas or in the operator's compartment.

Do not store ether cylinders in direct sunlight or at temperatures above 39°C (102°F).

Discard cylinders in a safe place. Do not puncture or burn cylinders.

Keep ether cylinders out of the reach of unauthorized personnel.

Lines, Tubes and Hoses

Do not bend or strike high pressure lines. Do not install bent or damaged lines, tubes or hoses.

Repair any loose or damaged fuel and oil lines, tubes and hoses. Leaks can cause fires. Contact your Caterpillar
dealer for repair or replacement.

Check lines, tubes and hoses carefully. Do not use your bare hand to check for leaks. Use a board or cardboard
to check for leaks. See "Fluid Penetration" in the "Safety" section for more details. Tighten all connections to the
recommended torque. Replace if any of the following conditions are found.

* End fittings damaged or leaking.
* Outer covering chafed or cut and wire reinforcing exposed.
* Outer covering ballooning locally.
* Evidence of kinking or crushing of the flexible part of hose.
* Armouring embedded in the outer cover.
* End fittings displaced.

Make sure that all clamps, guards and heat shields are installed correctly to prevent vibration, rubbing against
other parts, and excessive heat during operation.

Tire Information

Explosions of air-inflated earthmoving tires have resulted from heat-induced gas combustion inside the tires.
The heat, generated by welding or heating rim components, external fire, or excessive use of brakes can cause
gaseous combustion.

A tire explosion is much more violent than a blowout. The explosion can propel the tire, rim and axle
components as far as 500 m (1500 ft) or more from the machine. Both the force of the explosion and the flying
debris can cause personal injury or death, and property damage.

Do not approach a tire closer than the outside of the area represented by the shaded area in the above drawing.

Dry nitrogen (N2) gas is recommended for inflation of tires. If the tires were originally inflated with air, nitrogen
is still preferred for adjusting the pressure. Nitrogen mixes properly with air.

Nitrogen inflated tires reduce the potential of a tire explosion, because nitrogen does not support combustion.
Also, nitrogen helps prevent oxidation and the resulting deterioration of rubber and corrosion of rim
components.

Proper nitrogen inflation equipment and training in its use are necessary to avoid overinflation. A tire blowout or
rim failure can result from improper or misused equipment.

Stand behind the tread and use a self-attaching chuck when inflating a tire.

Servicing and changing tires and rims can be dangerous and should be done only be trained personnel using
proper tools and procedures. If correct procedures are not followed while servicing tires and rims, the assemblies
could burst with explosive force and cause serious personal injury or death. Follow carefully the specific
information provided by your tire or rim servicing man or dealer.

Mounting and Dismounting

* Mount and dismount the machine only where steps and/or handholds are provided.
* Inspect, and when necessary, clean and have repairs made to steps and handholds before mounting and

dismounting.

* Face the machine when mounting and dismounting.
* Maintain a three point contact (two feet and one hand or one foot and two hands contact) with the steps

and handholds.

* Never get on or off a moving machine.
* Never jump off the machine.
* Do not try to climb on or off the machine when carrying tools or supplies. Use a hand line to pull

equipment up onto the platform.

* Do not use any controls as handholds when entering or leaving the operator's station.

Secondary Exit

Machines equipped with cabs are equipped with secondary exits. For additional secondary exit information,
refer to topics "Right Cab Window" and "Cab Rear Window" in the "Monitoring Systems and Cab Features"
section of this manual.

Before Starting the Engine

Start the engine only from the operator's station. Never short across the starter terminals or across the batteries,
as this could bypass the engine neutral-start system as well as damage the electrical system.

Inspect the condition of the seat belt and mounting hardware. Replace any damaged or worn parts. Replace the
seat belt regardless of appearance, after three years of use.

Adjust the seat so that full pedal travel can be obtained with the operator's back against the seat back.

Make sure the machine is equipped with a lighting system as required by conditions.

Make sure all lights are working properly.

Make sure no one is working on, underneath or close to the machine before starting the engine or beginning to
move the machine. Make sure the area is free of personnel.

Engine Starting

Do not start the engine or move any of the controls if there is a "DO NOT OPERATE" or similar warning tag
attached to the start switch or controls.

Move all hydraulic controls to the HOLD position before starting the engine.

Move the transmission control lever to NEUTRAL.

Engage the parking/secondary brake.

Start and operate the engine in a well ventilated area only. In an enclosed area, vent the exhaust to the outside.

Before Operating the Machine

Clear all personnel from the machine and the area.

Clear all obstacles from the path of the machine. Beware of hazards such as wires, ditches, etc.

Be sure all windows are clean. Secure the doors and windows in either the open or shut position.

Adjust the rear view mirrors (if equipped) for best vision, especially close to the machine.

Make sure the machine horn, the backup alarm (if equipped) and all other warning devices are working properly.

Fasten the seat belt securely.

Machine Operation

Operate the machine only while seated and with the seat belt fastened.

Operate the controls only with the engine running.

Check for proper operation of all controls and protective devices while moving slowly in an open area.

The operator must be satisfied that no one will be endangered before moving the machine.

Do not allow riders on the machine unless additional seat, seat belt and Rollover Protective Structure (ROPS)
are provided.

Report any needed repairs noted during operation.

Carry bucket close to the ground, approximately 40 cm (15 in) above ground level.

Stay a safe distance from the edge of cliffs, overhangs and slide areas.

If the machine begins to sideslip on a grade, immediately dispose of the load and turn the machine downhill.

Be careful to avoid the condition which could lead to tipping when working on hills, banks or slopes, and when
crossing ditches, ridges or other obstructions.

Work up and down slopes, rather than sideways, whenever possible.

Keep the machine under control and do not work it over its capacity.

Be sure hitch points and the towing device are adequate.

Connect trailing equipment to a drawbar or hitch only.

Never straddle a wire rope cable or similar device, nor allow others to do so.

No personnel should be between the machine and trailing equipment when maneuvering to connect them. Block
the tongue or hitch of trailing equipment to align it with the drawbar or hitch.

Know the maximum height and reach of your machine.

Always keep the Rollover Protective Structure (ROPS) (if equipped) installed when operating the machine.

Machine Parking

Park on a level surface. If necessary to park on a grade, block the machine.

Apply the service brake to stop the machine.

Move the transmission control lever to NEUTRAL and the speed control to LOW IDLE.

Engage the parking/secondary brake control.

Lower all attachments to the ground.

Stop the engine.

Turn the start switch key to OFF and remove.

Turn the disconnect switch key to OFF and remove.

Copyright 1993 - 2022 Caterpillar Inc.
All Rights Reserved.
Private Network For SIS Licensees.

Mon Dec 19 2022 17:26:54 GMT+0700 (Indochina Time)

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Product: WHEEL LOADER
Model: 966C WHEEL LOADER 9KC
Configuration: 966C WHEEL LOADER / POWER SHIFT / 9KC00001-UP

(MACHINE) POWERED BY 3306 ENGINE

Operation and Maintenance Manual

966C AND 966R WHEEL LOADERS

Media Number -SEBU6290-00 Publication Date -01/02/1990 Date Updated -11/10/2001

Specifications and Model Views

Engine (1), fuel tank (2) and bucket (3).

Operator's compartment (4), hydraulic tank (5), radiator (6), transmission (7), and battery (8).

Key disconnect switch (9).

Basic machine shipping specifications are listed below.

Copyright 1993 - 2022 Caterpillar Inc.
All Rights Reserved.
Private Network For SIS Licensees.

Mon Dec 19 2022 17:27:17 GMT+0700 (Indochina Time)

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Product: WHEEL LOADER
Model: 966C WHEEL LOADER 9KC
Configuration: 966C WHEEL LOADER / POWER SHIFT / 9KC00001-UP

(MACHINE) POWERED BY 3306 ENGINE

Operation and Maintenance Manual

966C AND 966R WHEEL LOADERS

Media Number -SEBU6290-00 Publication Date -01/02/1990 Date Updated -11/10/2001

Product Identification and Serial Number Location

The Product Identification Number (PIN) will be used to identify a powered machine that is designed for an
operator to ride.

Caterpillar products such as earthmoving equipment not designed for an operator to ride (engines, transmissions,
etc.) are identified by Serial Numbers. Also, most major Caterpillar attachments are identified by Serial
Numbers.

For quick reference, record the identification numbers in the spaces provided below the illustration photographs.

Machine PIN____________________

Service Information Number Plate (SIN)

Transmission Serial Number____________________

Engine Serial Number____________________

Bucket Serial Number____________________

Copyright 1993 - 2022 Caterpillar Inc.
All Rights Reserved.
Private Network For SIS Licensees.

Mon Dec 19 2022 17:27:27 GMT+0700 (Indochina Time)

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Product: WHEEL LOADER
Model: 966C WHEEL LOADER 9KC
Configuration: 966C WHEEL LOADER / POWER SHIFT / 9KC00001-UP

(MACHINE) POWERED BY 3306 ENGINE

Operation and Maintenance Manual

966C AND 966R WHEEL LOADERS

Media Number -SEBU6290-00 Publication Date -01/02/1990 Date Updated -11/10/2001

Monitoring Systems and Cab Features

Battery Disconnect Switch

The battery disconnect switch is located on the right side of the operator's seat.

Disconnect Switch OFF (1) - Turn the key to the left to turn off the electrical system.

Disconnect Switch ON (2) - Insert the key, and turn it to the right, to turn on the electrical system. The switch

must be on before starting the engine.

Remove the key when leaving the machine. Also, remove the key when servicing the electrical system.

NOTICE

Never turn the disconnect key off with the engine running. Engine
damage could result.

Engine Heater and Start Switch

Preheat (1) - Turn the switch counterclockwise and hold to heat the engine glow plugs. The key returns to the

(2) position when released.

OFF (2) - The switch will return to the OFF position when released.

NOTE: Pull back on the accelerator pedal past the detent, to stop the engine.

ON (3) - Turn the switch clockwise and hold to start the engine. The key returns to the (2) position when

released.

Gauges

Engine Oil Pressure (1) - Indicates the pressure of the engine oil. The GREEN RANGE is normal with the

machine at high idle. The WHITE RANGE is normal with machine at low idle. The RED RANGE is low oil
pressure. If the indicator is in the RED RANGE, stop the machine and investigate the cause.

Do not operate the machine until the cause has been corrected.

Engine Coolant Temperature (2) - Indicates the temperature of the engine coolant. The GREEN RANGE is
normal operating temperature. The WHITE Range is cold coolant temperature. The RED RANGE is excessive
coolant temperature. If the indicator is in the RED RANGE, stop the machine and investigate the cause.

Do not operate the machine until the cause has been corrected.

Ammeter (3) - Indicates the charging condition of the charging circuit. In normal operation, the indicator should
be at zero. The GREEN RANGE indicates that the system is charging. The RED RANGE indicates that the
system is discharging. If the indicator remains in the RED RANGE, stop the machine and investigate the cause.

Do not operate the machine until the cause has been corrected.

Torque Converter Oil Temperature (4) - Indicates the temperature of the torque converter oil. The GREEN
RANGE is the normal operating temperature. The RED RANGE is excessive oil temperature. If the indicator is
in the RED RANGE, stop the machine and investigate the cause.

Do not operate the machine until the cause has been corrected.

Air Pressure (5) - Indicates low brake system air pressure. The GREEN RANGE is the normal operating air
pressure. The RED RANGE indicates low brake system air pressure. If the indicator is in the RED RANGE, stop
the machine and investigate the cause.

Do not operate the machine until the cause has been corrected.

Air Pressure (6) - Indicates the brake system air pressure.

Service Hour Meter (7) - Indicates the total operating hours of the engine. It should be used to determine

service intervals.

Supplemental Steering Light (If Equipped)

Supplemental Steering - Indicates the primary steering has failed and the supplemental steering is being used.

If the indicator comes on during operation, the fault alarm should sound. Steer the machine immediately to a
safe location and stop. Stop the engine and investigate the cause.

Do not operate the machine until the cause has been corrected.

Supplemental steering works only while the machine is moving. When the machine operates under supplemental
steering, no directional changes can be made.

Light Switch

OFF (1) - Move the switch to this position to turn all lights off.

Panel Lights (2) - Move the switch clockwise to this position to turn the panel lights on.

Front Working Lights (3) - Move the switch clockwise, to this position, to turn on the front working lights.

All Lights (4) - Move the switch clockwise, to this position, to turn on all lights.

Horn

Horn - Push the knob down to sound the horn. Use the horn to alert or to signal personnel.

Back-up Alarm (If Equipped)

Back-up Alarm - The alarm will sound when the transmission control lever is in the reverse position. It is used

to alert people behind the machine that it is backing up.

The back-up alarm is located on the rear of the machine.

A three position switch at the rear of the back-up alarm regulates its volume. (1) is High, (2) is Low and (3) is
Medium.

The alarm is set at the highest sound level when shipped from the factory. The setting should remain on high,
unless the job-site requires a lower level.

Seat Adjustment

NOTE: Adjust the seat at the beginning of each shift or when changing operators.

Adjust the seat to allow full travel of the pedals when the operator is seated against the seat back.

Push the lever to the operator's left, to allow moving the seat forward or backward.

Seat Belt

Always check the condition of the seat belt and mounting hardware before operating the machine.

Replace the seat belt at least once every three years, regardless of appearance. A date label, to determine the age
of the belt, is sewn onto each belt.

Inspect for worn or frayed webbing.

Check for worn or damaged buckle or anticreep slide on each half of the belt. Replace the belt, buckle or slides
if they are worn or damaged.

Inspect the belt mounting hardware. Replace any damaged or worn hardware. Keep the mounting bolts tight.

If the bolt and nut that holds the two parts of the seat belt mounting hooks together are not correctly installed,
the hooks can separate. This will allow the seat belt to separate from its mounting.

Inspect the hooks of each half of the belt to make certain the bolt and nut are correctly installed.

If the bolt and nut are not correctly installed, remove them. Install a new bolt and nut.

Seat Belt Adjustment

Adjust both ends of the belt. The belt should be snug but comfortable.

To Lengthen the Belt

1. With the belt unfastened, move the anticreep slide toward the buckle.

2. To remove the slack in outer loop (1), rotate buckle (2) to free the lock bar. This permits the belt to move

through the buckle.

3. Pull on the buckle until the slack is removed from the outer belt loop.

4. Loosen the other half of the belt in the same manner. Readjust the belt if it does not fit snugly with the buckle

in the center.

To Shorten the Belt

1. With the belt fastened, pull on the outer loop to tighten the belt.

2. Move the anticreep slide toward the anchor end of the belt to take up the slack in the outer loop.

3. Adjust the other half of the belt in the same manner.

4. Readjust the belt if it does not fit snugly with the buckle in the center.

Copyright 1993 - 2022 Caterpillar Inc.
All Rights Reserved.
Private Network For SIS Licensees.

Mon Dec 19 2022 17:27:42 GMT+0700 (Indochina Time)

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Product: WHEEL LOADER
Model: 966C WHEEL LOADER 9KC
Configuration: 966C WHEEL LOADER / POWER SHIFT / 9KC00001-UP

(MACHINE) POWERED BY 3306 ENGINE

Operation and Maintenance Manual

966C AND 966R WHEEL LOADERS

Media Number -SEBU6290-00 Publication Date -01/02/1990 Date Updated -11/10/2001

Machine Controls

Parking/Secondary Brake

NOTICE

Do not engage the parking/secondary brake while the machine is
moving unless an emergency exists. The use of the parking/secondary
as a service brake in regular operation will cause severe damage to the
parking/secondary brake system.

Parking/Secondary Brake - The parking/secondary brake is located on the dash.

Parking/Secondary Brake Engaged - Pull up on the knob to engage the parking/secondary brake.

Parking/Secondary Brake Disengaged - Push down on the knob to release the parking/secondary brake.

Brake Pedals

Left Brake Pedal - The left brake pedal disengages the transmission and brakes the machine. This permits

higher engine speed for better hydraulic response.

Depress the left brake pedal when positioning and raising the bucket at the same time.

Release the pedal to re-engage the transmission and to release the brake.

Right Brake Pedal - The right brake pedal slows down the machine ground speed for normal braking.

Depress the right brake pedal for normal machine braking.

Release the pedal to release the brake.

Accelerator Pedal

Accelerator Pedal - The accelerator pedal is located on the floor of the operator's station, at the right.

Push down the pedal to increase travel speed.

Release the pedal to decrease travel speed.

NOTE: Pull back on the accelerator pedal past the detent, to stop the engine.

Transmission Direction and Speed Control

Direction Selector

Forward (1) - Push the transmission lever forward. The machine will move forward.

Neutral (2) - The machine should not move when transmission lever is in neutral.

Reverse (3) - Pull the transmission lever toward the operator. The machine will move in reverse.

Speed Selector

Rotate the transmission lever to the desired gear speed:

1 - First Speed

2 - Second Speed

3 - Third Speed

4 - Fourth Speed

Transmission Neutral Lock

The transmission neutral lock is located on the right side of the steering column.

Unlocked (1) - Push down on the lever to release the transmission neutral lock.

Locked (2) - Pull up on the lever to lock the transmission neutral lock.

Steering Controls

Directional Steering

The directional steering, of the machine, is controlled by the steering wheel. The direction the steering wheel is
turned, is the direction that the machine will turn.

The steering frame lock must be removed to steer the machine. See "Before Starting the Engine" for
information.

Left Turn - Move the steering wheel in a counterclockwise direction to steer the machine, to the left. The
further the steering wheel is turned in a counterclockwise direction the sharper the left turn.

Right Turn - Move the steering wheel in a clockwise direction to steer the machine, to the right. The further the
steering wheel is turned in a clockwise direction the sharper the right turn.

Steering Column Tilting

To adjust the steering column, pull out on the steering column tilt knob (1) and move the steering column (2) to
the desired position. Release the steering column tilt knob (1) and the steering column will remain in the desired
position.

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Product: WHEEL LOADER
Model: 966C WHEEL LOADER 9KC
Configuration: 966C WHEEL LOADER / POWER SHIFT / 9KC00001-UP

(MACHINE) POWERED BY 3306 ENGINE

Operation and Maintenance Manual

966C AND 966R WHEEL LOADERS

Media Number -SEBU6290-00 Publication Date -01/02/1990 Date Updated -11/10/2001

Attachment Controls

Bucket Lift Lever

Float (1) - Push the lever all the way forward into detent, for FLOAT. The bucket will lower to the ground, and

move up and down, following the ground contour.

The lever will remain in FLOAT until pulled out of detent. The lever will then return to HOLD when released.

NOTICE

NEVER use FLOAT position to lower a loaded bucket. Machine
damage can result from bucket falling fast.

Lower (2) - Push the lever forward to lower the bucket. The lever will return to HOLD when released.

Hold (3) - The lever will return to HOLD when released from either RAISE or LOWER. The bucket will remain

in the position it is in.

Raise (4) - Pull the lever back to raise the bucket. Release the lever to stop lifting the bucket. The lever will
return to HOLD when released.

The lever is detented in the full raise position. It will stay in detent until the bucket reaches height set by the lift
kickout. Then it returns to HOLD.

Bucket Tilt Lever

Dump (1) - Push the lever forward to dump the bucket.

Hold (2) - Release the tilt lever. The bucket will remain in the position it is in.

Tilt Back (3) - Pull the lever back to tilt the bucket back.

The lever is detented in full tilt back position. It will stay in detent until the bucket reaches the preset angle set
by the kickout. Then it returns to HOLD.

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Product: WHEEL LOADER
Model: 966C WHEEL LOADER 9KC
Configuration: 966C WHEEL LOADER / POWER SHIFT / 9KC00001-UP

(MACHINE) POWERED BY 3306 ENGINE

Operation and Maintenance Manual

966C AND 966R WHEEL LOADERS

Media Number -SEBU6290-00 Publication Date -01/02/1990 Date Updated -11/10/2001

Before Starting the Engine

Machine Walk-Around Inspection

Remove steering frame lock and store in unlocked position. The steering frame lock must be removed to steer
the machine.

For maximum service life of the machine, make a thorough walk-around inspection before mounting the
machine to start the engine.

Look around and under the machine for such items as loose bolts, trash build-up, oil or coolant leaks, broken or
worn parts. Inspect the condition of the bucket and the hydraulic components.

Refer to "Walk-Around Inspection" in the "Maintenance Section" for detailed walk-around inspection
information.

Machine Pre-Start Checks

Check all of the oil, coolant and fuel levels.

Refer to the "Every 10 Service Hours or Daily" in the "Maintenance Section" for more detailed information.

Adjust the seat to allow full brake pedal travel with the operator's back against seat back.

Adjust the seat belt.

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Product: WHEEL LOADER
Model: 966C WHEEL LOADER 9KC
Configuration: 966C WHEEL LOADER / POWER SHIFT / 9KC00001-UP

(MACHINE) POWERED BY 3306 ENGINE

Operation and Maintenance Manual

966C AND 966R WHEEL LOADERS

Media Number -SEBU6290-00 Publication Date -01/02/1990 Date Updated -11/10/2001

Engine Starting

Engine Starting Above 16°C (+60°F)

1. Move the transmission directional control lever into NEUTRAL.

2. Engage the transmission neutral lock.

3. Engage the parking/secondary brake.

4. Move the attachment control levers to the HOLD position.

5. Push the accelerator pedal down past the detent position.

6. Turn the engine heat - start switch to start the engine. Release the switch when engine starts.

NOTICE

Do not crank the engine for more than 30 seconds. Allow the starter to
cool for 2 minutes before cranking again.

Engine Starting Below 16°C (+60°F)

1. Move the transmission directional control lever into NEUTRAL.

2. Engage the transmission neutral lock.

3. Engage the parking/secondary brake.

4. Move the attachment control levers to the HOLD position.

5. Push the accelerator pedal down past the detent position.

6. Turn the engine heat-start switch to heat the engine.

7. Turn the engine heat-start switch to start the engine. Release the switch when engine starts.

NOTICE

Do not crank the engine for more than 30 seconds. Allow the starter to
cool for 2 minutes before cranking again.

Do not move the heat-start switch to HEAT when the engine is warm
and running.

Engine Starting Below 16°C (+60°F) with Ether Starting Aid

NOTICE

Inject starting aid (ether), only while cranking the engine, or after
initial startup, until the engine is running smoothly.

Use sparingly, excessive ether without cranking can cause piston and
ring damage.

Wait approximately two seconds before injecting again.

Use ether for cold starting purposes only.

After every 30 seconds of engine cranking, allow two minutes for
starting motor to cool before cranking again.

1. Move the transmission directional control lever into NEUTRAL.

2. Engage the transmission neutral lock.

3. Engage the parking/secondary brake.

4. Move the attachment control levers to the HOLD position.

5. Push the accelerator pedal down past the detent position.

6. Turn the engine heat-start switch to heat the engine.

7. Spray the ether starting aid into the engine air intake.

8. Spray the ether start aid every two seconds while cranking the engine. Continue use until the engine starts and

is running smoothly.

9. Release the key switch when engine starts.

For starting below -18°C (0°F), use of optional cold weather starting aids is recommended. A coolant heater, fuel
heater, jacket water heater or extra battery capacity may be required.

At temperatures below- 23°C (-10°F), consult your Caterpillar dealer, or refer to the "Operation & Maintenance
Manual" for "Cold Weather Recommendations", Form SEBU5898, available from your Caterpillar dealer.

Engine Starting with Jumper Cables

Batteries give off flammable fumes that can explode.

Prevent sparks near the batteries. They could cause vapors to explode.
Do not allow jump cable ends to contact each other or the machine.

Do not smoke when checking battery electrolyte levels.

Electrolyte is an acid and can cause personal injury if it contacts skin or
eyes.

Always wear eye protection when starting a machine with jump cables.

Improper jump procedures can cause an explosion resulting in personal
injury.

Always connect battery positive (+) to battery positive (+) and battery
negative (-) to battery negative (-).

Jump only with a battery source and with the same voltage as the
stalled machine.

Turn off all lights and accessories on the stalled machine. Otherwise,
they will operate when the jump source is connected.

NOTICE

When starting from another machine, make sure the machines do not
touch. This could prevent damage to engine bearings and electrical
circuits.

Turn on (close) the disconnect switch prior to the boost connection to
prevent damage to electrical components on the stalled machine.

This machine has a 24 volt starting system. Use only equal voltage for
jump starting. Use of a welder or higher voltage will damage the
electrical system.

Use of Jumper Cables

When auxiliary start receptacles are not available, use the following procedure.

1. Make initial determination as to failure of machine to crank. Refer to special instruction SEHS7768 on use of
6V2150 Starting/Charging Analyzer Group. Procedure applies even if machine does not have diagnostic
connector.

2. Place the transmission control in NEUTRAL on the stalled machine. Engage the parking/secondary brake.
Lower the bucket to the ground. Move all controls to HOLD.

3. On stalled machine, turn the start switch to OFF. Turn off all accessories.

4. On stalled machine, turn on (close) the disconnect switch (if equipped).

5. Move boost start machine near enough to stalled machine for cables to reach, but DO NOT ALLOW

MACHINES TO TOUCH.

6. Stop the engine on the boost machine. Or, if using an auxiliary power source, turn off the charging system.

7. Make sure battery caps are all in place and tight on both machines.

8. Connect positive (+) jumper cable (red) to positive (+) cable terminal of discharged battery, or battery set on

stalled machine.

Do not allow positive cable clamps to touch any metal other than battery terminals.

9. Connect the other end of this positive jumper cable (red) to positive (+) terminal of boost battery. Use
procedure of Step 8 to determine correct terminal.

10. Connect one end of the negative (-) jumper cable to the other terminal (negative) of the boost battery.

11. Make final connection of negative (-) cable to frame (not battery negative post) away from battery, fuel or

hydraulic lines, or moving parts.

12. Start the engine on the boost machine. Or, energize the charging system on the auxiliary power source.

13. Wait a minimum of two minutes for the batteries in the stalled machine to partially charge.

14. Attempt to start the stalled engine. Refer to section on "Engine Starting".

15. Immediately after starting the stalled engine, disconnect the jumper cables in reverse order.

16. Conclude failure analysis on starting/charging system of stalled machine as required now that engine is

running and charging system in operation.

Engine Starting with Auxiliary Start Receptacles (If Equipped)

Located on the right side of the machine.

Some Caterpillar products may be equipped with auxiliary start receptacles as standard. All other machines can
be equipped with a parts service receptacle. A permanent receptacle is then always available for jump starting.

Two mating cable assemblies are also available to jump the stalled machine from another machine also equipped
with this receptacle or an auxiliary power pack. Your Caterpillar dealer can provide the correct cables in lengths
for your application.

1. Make initial determination as to failure of the stalled machine to crank. Refer to special instruction SEHS7768
on use of 6V2150 Starting/Charging Analyzer Group. Procedure applies even if machine does not have
diagnostic connector.

2. Place the transmission control in NEUTRAL on the stalled machine. Engage the parking/secondary brake.
Lower the bucket to the ground. Move all controls to HOLD.

3. Turn the start switch to OFF on the stalled machine. Turn off all accessories.

4. Turn on (close) the disconnect switch (if equipped) on the stalled machine.

5. Move the boost start machine near enough to the stalled machine for cables to reach, but DO NOT ALLOW

MACHINES TO TOUCH.

6. Stop the engine on the boost machine, or if using an auxiliary power source, turn off the charging system.

7. On the stalled machine connect the appropriate jump start cable to the auxiliary start receptacle.

8. Connect the other end of this cable to the auxiliary start receptacle of the boost source.

9. Start the engine on the boost machine. Or, energize the charging system on the auxiliary power source.

10. Wait a minimum of two minutes for the batteries in the stalled machine to partially charge.

11. Attempt to start the stalled engine. Refer to the beginning of "Engine Starting" in this section.

12. Immediately after starting the stalled engine, disconnect the jump start cable from the BOOST SOURCE.

13. Disconnect the other end of this cable from the stalled machine.

14. Conclude failure analysis on starting/charging system of the stalled machine as required, now that engine is

running and charging system in operation.

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Product: WHEEL LOADER
Model: 966C WHEEL LOADER 9KC
Configuration: 966C WHEEL LOADER / POWER SHIFT / 9KC00001-UP

(MACHINE) POWERED BY 3306 ENGINE

Operation and Maintenance Manual

966C AND 966R WHEEL LOADERS

Media Number -SEBU6290-00 Publication Date -01/02/1990 Date Updated -11/10/2001

After Starting the Engine

NOTICE

Keep engine speed low until the engine oil pressure registers on the
gauge. If it does not register within 10 seconds, stop the engine and
investigate the cause before starting again. Failure to do so, can cause
engine damage.

1. Allow a cold engine to warm up at LOW IDLE for at least five minutes. Engage and disengage the bucket

controls to help speed warm-up of hydraulic components.

2. Look at the gauges frequently during operation.

Also, to speed hydraulic oil warm-up, hold the bucket control in the CLOSE position for short periods, not more
than 10 seconds.

This will allow the oil to reach relief pressure, which causes it to warm more rapidly.

Cycle all controls to allow warm oil to circulate through all cylinders and lines.

When idling the engine for warm-up, observe the following recommendations:

* In temperatures above 0°C (+32°F), warm-up requires approximately 15 minutes.
* In temperatures below 0°C (+32°F), warm-up requires approximately 30 minutes or more.
* In temperatures below -18°C (0°F) or if hydraulic functions are sluggish, more time may be required.

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Product: WHEEL LOADER
Model: 966C WHEEL LOADER 9KC
Configuration: 966C WHEEL LOADER / POWER SHIFT / 9KC00001-UP

(MACHINE) POWERED BY 3306 ENGINE

Operation and Maintenance Manual

966C AND 966R WHEEL LOADERS

Media Number -SEBU6290-00 Publication Date -01/02/1990 Date Updated -11/10/2001

Machine Operation

Be sure no one is working on or near the machine to prevent injury. Keep the machine under control at all times
to prevent injury.

Reduce engine speed when maneuvering in tight quarters or when breaking over a rise.

Select the gear range necessary before starting downgrade. Do not change gears while going downhill.

A good practice is to use the same gear range going downgrade that would be used to go up the grade.

Do not allow the engine to overspeed downhill. Use the service brake pedal to reduce engine overspeed going
downhill.

When the load will be pushing the machine, put the transmission selector lever in FIRST speed before starting
downhill.

1. Adjust the operator's seat.

2. Fasten the seat belt.

3. Raise all lowered attachments enough to clear any obstructions.

4. Push down on the service brake pedal to keep the machine from moving.

5. Push in the parking/secondary brake knob to release the parking/secondary brake.

6. Disengage the transmission neutral lock.

7. Move the transmission control lever to the desired direction and speed.

8. Release the service brake pedal.

9. Push down on the accelerator pedal to the desired engine speed.

10. Drive the machine forward for best visibility and control.

NOTICE

For operator comfort and maximum service life of power train
components, deceleration and/or braking is recommended before any
directional shifts are made.

Parking/Secondary Brake System

Personal injury could result from the sudden stop of the machine. The
parking/secondary brake is automatically engaged when brake air
pressure drops below safe operating pressure.

If the brake system oil pressure drops below normal operating pressure,
a warning horn will sound and the parking/secondary brake indicators
on the operator's panel will come on. The fault light will start flashing.

If the pressure drops further, the parking/secondary brake will engage
automatically.

Be prepared for a sudden stop. Correct the reason for the loss of air
pressure. Do not move the machine without normal brake oil pressure.

Loss of brake air pressure will cause the low air pressure horn to sound. Loss of air pressure will cause the
parking/secondary brake to automatically engage and stop the machine.

NOTICE

Moving the machine with the parking/secondary brake engaged can
cause excessive wear or damage to the brake. If necessary, have the
brake repaired before operating the machine.

Supplemental Steering (If Equipped)

Personal injury or death could result when primary steering fails.

If the primary steering fault light comes on, steer the machine
IMMEDIATELY to a safe location and stop.

Have any necessary repairs made before returning the machine to
operation.

Steering and braking effort will increase with the engine stopped.

Supplemental steering works only while the machine is in motion.

The primary steering fault light indicates primary steering has failed and supplemental steering is in use. When
the light comes on, steer the machine immediately to a safe location and stop. Stop the engine and investigate the
cause. Do not operate the machine until the cause has been found and corrected.

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Product: WHEEL LOADER
Model: 966C WHEEL LOADER 9KC
Configuration: 966C WHEEL LOADER / POWER SHIFT / 9KC00001-UP

(MACHINE) POWERED BY 3306 ENGINE

Operation and Maintenance Manual

966C AND 966R WHEEL LOADERS

Media Number -SEBU6290-00 Publication Date -01/02/1990 Date Updated -11/10/2001

Operating Techniques

General

NOTE: All illustrations in this topic are typical examples.

For good operator vision and loader stability, carry the loaded bucket low, approximately 40 cm (15 inches)
above the ground.

Utilize wait time to clean and level the work area.

Maintain traction by avoiding excessive down pressure on the bucket.

When working in hard material use bucket teeth, or "half-arrow" bolt-on cutting edges.

To control dumping, move the tilt control lever to the DUMP position. Then return to the HOLD position.
Repeat until the bucket is empty.

To keep dust away from the engine and maintain visibility, dump with the wind to your back.

Be certain that the bucket used is appropriate for the work performed. Exceeding the machine limits will reduce
the service life of the machine.

Dozing

NOTICE

Do not doze with the bucket in the tilt forward position to avoid bucket
damage.

When dozing, keep the bucket bottom parallel to the ground.

Dumping

Use the bucket stops for maximum dumping angle.

NOTICE

Striking the stops unnecessarily and repetitively can result in
accelerated wear and high maintenance cost of the loader linkage.

Loading from a Stockpile With Bucket

1. Position the bucket parallel to, and just skimming, the ground. Drive the bucket straight into the pile.

2. Move the control to the RAISE detent position as forward movement slows. Return to the HOLD position for

additional crowding power.

3. To "pump" in a heaped load, work the tilt control lever back and forth.

4. When the bucket is loaded, move the tilt control to the TILT BACK position.

5. When the tilt control lever is released to the HOLD position, the bucket will rise.

6. Raise the bucket high enough to clear the material being loaded. Shift the transmission control to REVERSE.

7. Carry the loaded bucket approximately 40 cm (15 inches) above the ground level.

8. When reaching the dump area, move the lift control to the RAISE detent. The lift kickout will automatically

return the lift control to HOLD.

Loading Hauling Units With Bucket

1. To reduce the loader turning and travel, position the hauling unit at an angle to the material being loaded.

2. The travel distance should be long enough for the bucket to reach the lift height without slowing loader

movement.

3. Position the loader to dump the load in the center of the hauler body. If the hauler body is two bucket widths
or more in length, dump from the front to the rear.

4. Push the tilt lever forward to dump the bucket.

5. Shake the bucket to loosen sticky material. Move the tilt lever back and forth quickly, allowing the tilt arms to

strike the stops.

NOTICE

Striking the stops unnecessarily and repetitively can result in
accelerated wear and high maintenance cost of the loader linkage.

6. Put the tilt lever in the TILT BACK detent.

7. Before lowering the bucket, make sure the hauling unit is out from under the bucket.

8. Lower the bucket while positioning the loader for the next load.

Loading From A Bank With Bucket

Personnel injury or death can result from falling material.

Remove any overhang and watch for sliding material.

1. Start to load at the base of the bank and follow up the face.

2. Raise the bucket slightly and move away from the bank.

Excavating With Bucket

1. Lower the bucket to the ground and position for a slight digging angle.

2. Apply down pressure to the bucket as the loader starts forward. Return the lift control to HOLD when

sufficient penetration is obtained.

3. Maintain level cuts while moving forward, by raising and lowering the bucket.

4. When the bucket is loaded, tilt it back against the stops. Carry the loaded bucket approximately 40 cm (15

inches) above the ground when moving to the dump area.

Loading Hoppers

1. Load the bucket (see "Loading from a Stockpile" steps 1 through 8).

2. When the lift kickout height is reached, dump the load into the hopper. If possible, dump with the wind to

your back.

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Product: WHEEL LOADER
Model: 966C WHEEL LOADER 9KC
Configuration: 966C WHEEL LOADER / POWER SHIFT / 9KC00001-UP

(MACHINE) POWERED BY 3306 ENGINE

Operation and Maintenance Manual

966C AND 966R WHEEL LOADERS

Media Number -SEBU6290-00 Publication Date -01/02/1990 Date Updated -11/10/2001

Machine Adjustments

Bucket Positioner - Tilt Adjustment

Use caution to avoid possible personal injury when adjusting the bucket
positioner.

Stop the engine and lower all equipment to relieve the hydraulic
pressure.

Engage the parking/secondary brake and block the tires to prevent
sudden movement of the machine.

Keep unauthorized personnel off the machine.

1. Start the engine. Lower the bucket to the ground.

2. Position the bucket at the desired angle to the ground. Stop the engine.

3. Loosen the cam bracket bolts. Move the tilt control to TILT BACK detent.

4. Move the cam against the plunger until the lever returns to the HOLD position.

5. Tight the cam bracket bolts.

6. To test the adjustment, start the engine. Raise and dump the bucket. Move the tilt control lever to TILT BACK

detent.

7. When the pre-set angle is reached, the tilt control lever should return to HOLD.

Bucket Lift Kickout

Use caution to avoid possible personal injury when adjusting the
attachment lift kickout.

Keep personnel off the machine. Clear the area when working under or
around the attachment linkage.

With the attachment raised, proper support must be provided for the
attachment and/or the linkage.

1. Start the engine. Raise the attachment to the desired height and stop the engine.

2. Block the attachment and the linkage.

3. Position the high point of the cam against the kickout valve roller.

4. Adjust the control valve so the valve roller stoke is 10 mm (.4 in) from fully extended position.

5. Remove the blocking and lower the attachment to the ground.

6. To check the adjustment, start the engine and move the attachment lift control to the RAISE detent.

7. At the pre-set lift height, the control lever should return to HOLD.

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Product: WHEEL LOADER
Model: 966C WHEEL LOADER 9KC
Configuration: 966C WHEEL LOADER / POWER SHIFT / 9KC00001-UP

(MACHINE) POWERED BY 3306 ENGINE

Operation and Maintenance Manual

966C AND 966R WHEEL LOADERS

Media Number -SEBU6290-00 Publication Date -01/02/1990 Date Updated -11/10/2001

Machine Parking

Machine Stopping

NOTICE

Park on a level surface. If it is necessary to park on a grade, block the
wheels securely.

Do not engage the parking/secondary brake while the machine is
moving unless an emergency exists.

1. Apply the service brakes to stop the machine.

2. Move the transmission control lever to NEUTRAL.

3. Move the lever to engage the transmission neutral lock.

4. Pull the knob up to engage the parking/secondary brake.

5. Lower the bucket to the ground and apply slight down pressure.

Engine Stopping

1. With the machine stopped, run the engine for 5 minutes at low idle.

2. Pull the accelerator pedal back past the detent to stop the engine. Turn the heater-start switch to OFF. Remove

the disconnect switch key.

3. Use the steps and handholds, use both hands and face the machine, when dismounting.

4. Drain the moisture from the air tank daily.

5. Inspect the engine compartment for debris. Clean out any debris and paper to avoid a fire.

6. Remove all flammable debris from front bottom guard through the access doors to reduce fire hazard.

7. Install all vandalism protection locks and covers.

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Product: WHEEL LOADER
Model: 966C WHEEL LOADER 9KC
Configuration: 966C WHEEL LOADER / POWER SHIFT / 9KC00001-UP

(MACHINE) POWERED BY 3306 ENGINE

Operation and Maintenance Manual

966C AND 966R WHEEL LOADERS

Media Number -SEBU6290-00 Publication Date -01/02/1990 Date Updated -11/10/2001

Transportation Hints

Machine Shipping

Investigate the travel route for overpass clearances. Make sure there will be adequate clearance if the machine
being transported is equipped with a ROPS, cab or canopy.

To prevent the machine from slipping while loading, or shifting in transit, remove ice, snow or other slippery
material from the loading dock and the truck bed before loading.

NOTICE

Obey all state and local laws governing the weight, width and length of
a load.

Observe all regulations governing wide loads.

1. Block the trailer or rail car wheels before loading (trailer shown).

2. After the machine is in position, connect the steering frame lock link to hold the front and rear frames rigid.

3. Lower the bucket to the floor of the transport machine. Move the transmission control lever to NEUTRAL.

4. Engage the transmission neutral lock.

5. Engage the parking/secondary brake.

6. Stop the engine.

7. Turn the heater-start switch to OFF.

8. Turn the disconnect key switch to OFF and remove the key.

9. Block the tires and secure the machine with tie-downs when transporting on a rail car or a tractor-trailer.

10. Cover the exhaust opening or secure the rain cap to prevent the turbocharger from "windmilling" in transit.

Machine Roading

Before roading a machine, consult your tire dealer for recommended tire pressures and speed limitations.

"TON km/h" (TON MPH) limitations must be observed. Consult your tire dealer for the speed limit of the tires
involved.

When traveling long distances, stop every 40 km (25 miles) or 1 hour for 30 minutes to allow the tires and
components to cool.

Inflate the tires to the correct pressure.

Use a self-attaching inflation chuck and stand behind the tire tread while inflating the tire. See "Tire Inflation
Information."

Bring the engine coolant, the crankcase oil and the transmission oil up to the correct levels.

Check with the proper officials to obtain the required permits, etc.

Travel at a moderate speed. Observe all speed limitations when roading the machine.

Perform a "Walk-Around Inspection" and measure the fluid levels in the various compartments.

Machine Lifting/Tiedown Information

NOTICE

Improper lifting or tiedowns can allow load to shift and cause injury or
damage.

1. Weight and instructions given herein apply to units
manufactured by Caterpillar Inc.

966C & 966R Weight 15915 kg (35,000 lb)

2. Use proper rated cables and slings for lifting. Position crane
for level machine lift.

3. Spreader bar widths should be sufficient to prevent contact
with machine.

4. Use two rear and two front holes provided for tiedown.

Install tiedowns at several locations, and block wheels front and rear.

Check state and local laws governing weight, width and length of load.

Contact your Caterpillar dealer for shipping instructions for your machine.

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Configuration: 966C WHEEL LOADER / POWER SHIFT / 9KC00001-UP

(MACHINE) POWERED BY 3306 ENGINE

Operation and Maintenance Manual

966C AND 966R WHEEL LOADERS

Media Number -SEBU6290-00 Publication Date -01/02/1990 Date Updated -11/10/2001

Towing Information

Personal injury or death could result when towing a disabled machine
incorrectly.

Block the machine to prevent movement before releasing the brakes.
The machine can roll free if it is not blocked.

Follow the recommendations below, to properly perform the towing
procedure.

This machine is equipped with spring applied, air pressure released brakes. If the engine or pressure air system
are inoperable, the brakes are applied and the machine cannot be moved.

These towing instructions are for moving a disabled machine a short distance, only a few meters (feet) at low
speed, no faster than 2 km/h (1.2 mph), to a convenient location for repair. These instructions are for
emergencies only. Always haul the machine if long distance moving is required.

Shielding must be provided on the towing machine, to protect the operator if the tow line or bar should break.

Do not allow riders on the machine being towed, unless the operator can control the steering and/or braking.

Before towing, make sure the tow line or bar is in good condition and has enough strength for the towing
situation involved. Use a towing line or bar with a strength of at least 1.5 times the gross weight of the towing
machine, for a disabled machine stuck in mud or when towing on a grade.

Keep the tow line angle to a minimum. Do not exceed a 30° angle from the straight ahead position.

Quick machine movement could overload the tow line or bar and cause it to break. Gradual and smooth machine
movement will work better.

Normally, the towing machine should be as large as the disabled machine. Satisfy yourself that the towing
machine has enough brake capacity, weight and power, to control both machines for the grade and distance
involved.

To provide sufficient control and braking when moving a disabled machine downhill, a larger towing machine or
additional machines connected to the rear could be required. This will prevent it from rolling uncontrolled.

The different situation requirements cannot be given, as minimal towing machine capacity is required on smooth
level surfaces to maximum on inclines or poor surface conditions.

Consult your Caterpillar dealer for towing a disabled machine.

Engine Running

NOTICE

If the power train and the steering system are operable, and the engine
is running, the machine can be towed a SHORT DISTANCE, pulled
out of mud or to the side of the road.

The operator on the towed machine MUST steer in the direction of the
tow line.

Make certain, that all instructions outlined in this topic "Towing Information" are carefully and exactly followed.

Engine Stopped

Perform the following steps before towing the machine with the engine stopped.

1. Reverse the hydraulic steering hose connections ON ONE CYLINDER ONLY, so the steering cylinders can
move freely.

NOTICE

Be sure the cylinder hoses are connected correctly before operating the
machine. With the hoses reversed, the steering system will not function.

2. If internal transmission or drive line failure is suspected, remove the axle shafts.

Refer to your Caterpillar dealer or to the Service Manual for your machine for axle shaft removal and
installation procedures.

When the axle shafts are removed, the machine has NO
parking/secondary brakes. The machine can roll and cause personal
injury or death.

Block the wheels securely so that the machine cannot move.

If the brakes are in good operating condition, the machine has limited
wheel brake ability. The pedal effort is high due to the lack of the
hydraulic boost.

The towing connection must be rigid, or towing must be done by two
machines of the same size or larger than the towed machine. Connect a
machine on each end of towed machine.

3. Release the parking/secondary brake.

NOTICE

Release the parking/secondary brake to prevent excessive wear and
damage to the parking/secondary brake system, when towing without
brake air pressure.

The procedure for manual release of the parking/secondary brake is
outline in the next topic, "Manual Release of the Parking/Secondary
Brake."

4. Inspect the machine for power train damage. Remove all four axle shafts if damaged is suspected.

5. Fasten the tow bar.

6. Remove the wheel blocks. Tow the machine slowly. Do not tow any faster than 2 km/h (1.2 mph).

Be sure all necessary repairs and adjustments have been made before a
machine that has been towed to a service area, is put back into
operation.

Manual Release of Parking/Secondary Brake

Do not operate the machine if the brake was applied due to a
malfunction of the air system or the brake.

Correct any problem before attempting to operate the machine.

Block the wheels securely so that the machine cannot move.

1. Connect the steering frame lock link.

NOTE: Perform the following procedure on all four wheels.

2. Loosen locknut (1). Move locknut (1) as far as possible towards the rod end (2).

3. Continue to turn nut counterclockwise until the parking/secondary brake is release.

The machine can be moved a short distance only.

Have the brake system repaired and the parking/secondary brake
linkage adjusted before the machine is operated.

Copyright 1993 - 2022 Caterpillar Inc.
All Rights Reserved.
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Product: WHEEL LOADER
Model: 966C WHEEL LOADER 9KC
Configuration: 966C WHEEL LOADER / POWER SHIFT / 9KC00001-UP

(MACHINE) POWERED BY 3306 ENGINE

Operation and Maintenance Manual

966C AND 966R WHEEL LOADERS

Media Number -SEBU6290-00 Publication Date -01/02/1990 Date Updated -11/10/2001

Tire Inflation Information

2

Tire Inflation with Nitrogen (N)

Caterpillar recommends using dry nitrogen (N2) gas for both tire inflation, and tire pressure adjustments on all
rubber tired machines. Nitrogen is an inert gas and will not support combustion inside the tire.

Proper nitrogen inflation equipment, and training in using the
equipment, are necessary to avoid over inflation. A tire blowout or rim
failure can result from improper or misused equipment and serious
personal injury or death can occur.

Because a fully charged nitrogen cylinder's pressure is approximately
15,000 kPa (2200 psi), a tire blowout and/or rim failure can occur if the
inflation equipment is not used correctly.

In addition to reducing the risk of an explosion, using nitrogen to inflate tires lessens the slow oxidation of the
rubber and the accompanying gradual tire deterioration. This is especially important for tires that have an
expected long service life (four or more years). It also reduces the corrosion of rim components and the resultant
disassembly problems.

Use a self-attaching inflation chuck and stand behind the tread when
inflating a tire, to prevent possible personal injury.

NOTICE

Set the tire inflation equipment regulator at no more than 140 kPa (20
psi) over the recommended tire pressure.

Use only Caterpillar Part 6V4040 Nitrogen Tire Inflation Group, or equivalent, to inflate tires from a nitrogen
gas cylinder. Refer to Special Instruction, Form SMHS7867, for tire inflation instructions.

Use the same tire pressures for nitrogen inflation that are used for air inflation. Consult your tire dealer for
operating pressures.

Tire Shipping Pressure

The tire inflation pressures shown in the following chart are cold inflation shipping pressures.

The operating inflation pressure is based on the weight of a ready-to-work machine without attachments, at rated
payload, and in average operating conditions. Pressures for each application may vary and should always be
obtained from your tire supplier.

Tire Inflation Pressures Adjustment

A tire inflation in a warm shop area, 18°C to 21°C (65°F to 70°F), will be underinflated if the machine works in
freezing temperatures. Low pressure shortens the life of a tire.

When operating in freezing temperatures, consult the Cold Weather Recommendations Operation and
Maintenance Manual, Form SEBU5898, for adjusted inflation pressures.

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Product: WHEEL LOADER
Model: 966C WHEEL LOADER 9KC
Configuration: 966C WHEEL LOADER / POWER SHIFT / 9KC00001-UP

(MACHINE) POWERED BY 3306 ENGINE

Operation and Maintenance Manual

966C AND 966R WHEEL LOADERS

Media Number -SEBU6290-00 Publication Date -01/02/1990 Date Updated -11/10/2001

Torque Specifications

For additional torque specifications, not included in this section, refer to "Torque Specifications," Form
SENR3130, available from your Caterpillar dealer.

Torques for Ground Engaging Tool Bolts

Torque for Standard Torque Hose Clamps - Worm Drive Band Type

NOTICE

The following chart gives the torques for initial installation of hose
clamps on new hose and for reassembly or retightening of hose clamps
on existing hose.

Torque for Standard Bolts, Nuts and Taperlock Studs

NOTICE

The following charts give general torques for bolts, nuts and taperlock
studs of SAE Grade 5 or better quality.

Torques for Bolts and Nuts With Standard Threads

Torques for Taperlock Studs

Torque for Metric Fasteners

NOTICE

Be very careful never to mix metric with U.S. customary (standard)
fasteners. Mismatched or incorrect fasteners will cause machine
damage or malfunction and may even result in personal injury.

Original fasteners removed from the machine should be saved for
reassembly whenever possible. If new fasteners are needed, they must
be of the same size and grade as the ones that are being replaced.

The material strength identification is usually shown on the bolt head
by numbers (8.8, 10.9, etc.). The following chart gives standard torques
for bolts and nuts with Grade 8.8.

NOTE: Metric hardware must be replaced with metric hardware. Check parts book for proper replacement.

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Product: WHEEL LOADER
Model: 966C WHEEL LOADER 9KC
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Operation and Maintenance Manual

966C AND 966R WHEEL LOADERS

Media Number -SEBU6290-00 Publication Date -01/02/1990 Date Updated -11/10/2001

Cooling System Specifications

Coolant Information

Diesel engine operating temperatures have increased to improve engine efficiency. This means proper cooling
system maintenance is especially important. Overheating, overcooling, pitting, cavitation erosion, cracked heads,
piston seizures, and plugged radiators are classic cooling system failures. In fact, coolant is as important as the
quality of fuel and lubricating oil.

NOTICE

Caterpillar recommends that the coolant mixture contain a minimum
of 30% Caterpillar Antifreeze, or equivalent. Liquid supplemental
coolant additive must be added, when not using Caterpillar Antifreeze,
which contains the proper additive.

Never add coolant to an overheated engine, engine damage can result.
Allow the engine to cool first.

All water is corrosive at engine operating temperature. The cooling
system should be protected with a 3% to 6% concentration of liquid
supplemental coolant additive at all times, regardless of the
concentration of antifreeze.

Excessive supplemental coolant additive greater than the
recommended 6%, together with concentrations of antifreeze greater
than 65% can cause deposits to form and can result in radiator tube
blockage, overheating, and/or water pump seal damage.

Do not use liquid supplemental coolant additive or elements or
antifreeze with Dowtherm 209 Full-Fill coolant. Dowtherm 209 Full­Fill coolant is not compatible with other antifreezes and coolant
mixtures.

Dowtherm 209 full-fill coolant will lower the water pump cavitation
temperature and coolant boiling point. These lowered temperatures
will cause overheating at a lower ambient temperature than an
ethylene glycol and water mix. If Dowtherm is used, follow the
instructions provided and use only the inhibitor package recommended
by the supplier.

If the machine is to be stored in, or shipped to, an area with freezing
temperatures, the cooling system must be protected to the lowest
expected outside (ambient) temperature.

The engine cooling system is normally protected to -28°C (-20°F) with
Caterpillar Diesel Engine Antifreeze, when shipped from the factory
unless special requirements are defined.

Machines shipped from the factory for initial use in Brazilian territory
do not have engine cooling system protected with Caterpillar Diesel
Engine Antifreeze.

In case of doubt concerning the coolant additive to be used consult
your Caterpillar dealer.

Check the specific gravity of the coolant solution frequently in cold weather to ensure adequate protection.

Clean the cooling system if it is contaminated, if the engine overheats or if foaming is observed in the radiator.

Coolant should be drained, system cleaned and new coolant added every 3000 service hours or two years. When
not using Caterpillar Antifreeze and supplemental coolant additive as recommended, the drain period must be
shortened to 1500 service hours or one year.

Filling at over 20 liters (5 U.S. gallons) per minute can cause air pockets in the cooling system.

After draining and refilling the cooling system, operate the engine with the radiator cap removed until the
coolant reaches normal operating temperature and the coolant level stabilizes. Add coolant as necessary to fill
the system to the proper level.

Operate with a thermostat in the cooling system all year-round. Cooling system problems can arise without a
thermostat.

Refer to "Know Your Cooling System," form SEBD0518 and "Coolant and Your Engine" form SEBD0970, for
more detailed specifications.

Coolant Water

Hard water, or water with high levels of calcium and magnesium ions, encourages the formation of insoluble
chemical compounds by combining with cooling system additives such as silicates and phosphates.

The tendency of silicates and phosphates to precipitate out-of-solution increases with increasing water hardness.
Hard water, or water with high levels of calcium and magnesium ions encourages the formation of insoluble
chemicals, especially after a number of heating and cooling cycles.

Caterpillar prefers the use of distilled water or deionized water to reduce the potential and severity of chemical
insolubility.

Using water that meets the minimum acceptable water requirement may not prevent drop out of these chemical
compounds totally, but should minimize the rate to acceptable levels.

Antifreeze

NOTICE

Caterpillar recommends that the coolant mix contain a minimum of
30% Caterpillar Antifreeze, or equivalent and acceptable water to
maintain an adequate water pump cavitation temperature for efficient
water pump performance.

Premix coolant solution to provide protection to the lowest expected
outside (ambient) temperature. Pure undiluted antifreeze will freeze at

-23°C (-10°F).

Only use a greater concentration (above 30%) of Caterpillar Antifreeze
as needed for anticipated outside (ambient) temperatures. Do not
exceed a coolant mixture of 60% antifreeze to water since a
concentration above 60% antifreeze will reduce the engine's freeze
protection and increase the possibility of deposit formation in the
cooling system.

Use Caterpillar Antifreeze or GM Specification 6038-M Antifreeze. Caterpillar Antifreeze is available through
your Caterpillar dealer in quantities that follow.

Most commercial antifreezes are formulated for gasoline engine applications and will, therefore, have high
silicate content. Caterpillar Antifreeze is formulated with a low silicate content and the proper coolant additives
for heavy duty diesel engines.

GM Specification 6038-M is a low silicate antifreeze, but supplemental coolant additive must be added.

The major advantages of Caterpillar Antifreeze are:

* Significantly reduces water pump seal leakage problems caused by over concentration of chemical
additives.

* There is no need to add supplemental coolant additive on initial fill which must be done with current
commercially available antifreezes.
* High silicate antifreezes used with a supplemental coolant additive can cause a build-up of solids over a
period of time which can cause plugging, loss of heat transfer, and water pump seal damage.

Make proper antifreeze additions.

Adding pure antifreeze as a makeup solution for cooling system top-up is an unacceptable practice. It increases
the concentration of antifreeze in the cooling system which increases the concentration of dissolved solids and
undissolved chemical inhibitors in the cooling system. Add antifreeze mixed with water to the same freeze
protection as your cooling system.

Use the chart below to assist in determining the concentration of Caterpillar Antifreeze to use.

Supplemental Coolant Additive

Supplemental coolant additive is necessary to prevent rust, scale, pitting and/or corrosion of engine parts that
coolant comes in contact with. Most antifreeze solutions DO NOT contain sufficient supplemental coolant
additive.

NOTICE

Always add supplemental coolant additive or equivalent to the coolant,
or install a Caterpillar supplemental coolant additive element (if
equipped). Never use coolant only, except if Caterpillar Antifreeze is
being used which contains the additive. In this case, no supplemental
coolant additive is needed on initial fill, but is necessary on a
maintenance basis.

Use supplemental coolant additive or a supplemental coolant additive
element (if equipped). This will provide a 3% to 6% concentration in
the cooling system to help prevent corrosion.

To prevent overinhibiting the engine's cooling system, never use both
the liquid supplemental coolant additive and the supplemental coolant
additive element (if equipped) at the same time. The use of these
additives together could result in excessive concentration that would
exceed the Caterpillar recommended maximum of 6%.

The over concentration of an additive can deposit on the higher
temperature surfaces of the cooling system and create a barrier that
reduces the engine's heat transfer characteristics. Reduced heat
transfer could cause cracking of the cylinder head and other high

temperature components. Excessive concentrations of additive could
also accelerate water pump seal wear.

Supplemental coolant additive is needed when not using Caterpillar
Antifreeze for premixed coolant solution.

Liquid supplemental coolant additive can be purchased from your Caterpillar dealer. Follow the instructions on
the container.

NOTICE

DO NOT add supplemental coolant additive at initial fill when using
Caterpillar Antifreeze. Caterpillar Antifreeze contains the necessary
supplemental coolant additive precharge. Addition of supplemental
coolant additive could result in an overconcentration.

On initial fill of a new or reconditioned engine if Caterpillar Antifreeze is not used, add 1 liter (1 quart) of
supplemental coolant additive, or equivalent, for each 30 liters (8 U.S. gallons) so that the cooling system will
have a 3% to 6% concentration of supplemental coolant additive.

To maintain a 3% to 6% concentration of additive, add liquid supplemental coolant additive or install a
maintenance supplemental coolant additive element (if equipped), every 250 service hours or oil change,
whichever occurs first. Use the 8T5296 Supplemental Coolant Additive Test Kit to check for concentration.

If the engine is not equipped with spin-on element, add .25 liter (.53 pint) of supplemental coolant additive for
each 38 liters (10 U.S. gallons) of coolant capacity to maintain the 3% to 6% concentration of additive.

Cooling System Cleaning

Caterpillar Cooling System Cleaners are designed to clean the system of harmful scale and corrosion. It
dissolves mineral scale, corrosion products, light oil contamination and sludge.

Clean the system according to the maintenance interval chart, or whenever the coolant is dirty or foaming.

Cooling system cleaners are available from your Caterpillar dealer in the quantities listed below. Follow the
label directions for proper usage.

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Product: WHEEL LOADER
Model: 966C WHEEL LOADER 9KC
Configuration: 966C WHEEL LOADER / POWER SHIFT / 9KC00001-UP

(MACHINE) POWERED BY 3306 ENGINE

Operation and Maintenance Manual

966C AND 966R WHEEL LOADERS

Media Number -SEBU6290-00 Publication Date -01/02/1990 Date Updated -11/10/2001

Fuel Specifications

Fuel Information

NOTICE

Fill the fuel tank at the end of each day of operation to drive out moist
air and to prevent condensation.

Do not fill the tank to the top. Fuel expands as it gets warm and may
overflow.

Do not fill the fuel filters with fuel before installing them.
Contaminated fuel will cause accelerated wear to the fuel system parts.

Drain the water and sediment from the fuel tank at the start of a shift or after the fuel tank has been filled and
allowed to stand for 5 to 10 minutes.

After changing the fuel filter, always prime the fuel system (if equipped with a priming pump) to remove air
bubbles from the system.

Drain water and sediment from any fuel storage tank weekly, and before the tank is refilled. This will help
prevent water or sediment being pumped from the storage tank into the machine fuel tank.

Use only fuel as recommended in this section.

Fuel Heaters

Use of a fuel heater can help eliminate some cold weather problems. A fuel heater should be installed so that the
fuel is heated before it goes into the first or primary fuel filter.

Select a fuel heater that is mechanically simple, yet adequate for the application. The fuel heater should also
prevent overheating of the fuel. Disconnect or deactivate the fuel heater in warm weather.

A loss of engine power will occur if the fuel supply temperature exceeds 30°C (85°F).

NOTE: Use only thermostatically controlled or self-regulating fuel heaters as recommended. Do not use fuel
heaters in warm temperatures.

For further information on fuel heaters, contact your Caterpillar dealer.

Fuel Types

Diesel engines have the ability to burn a wide variety of fuels. These fuels are divided into two general groups,
preferred and permissible.

The preferred fuels provide maximum engine service life and performance. They are distillate fuels. They are
commonly called diesel fuel, furnace oil, gas oil or kerosene.

The permissible fuels are crude oils or blended fuels. Use of these fuels can result in higher maintenance costs
and reduced engine service life.

Refer to "Fuel Recommendations for Caterpillar Diesel Engines," Form SEHS7067, for a detailed summary of
preferred and permissible fuels and their specifications.

Refer to "Diesel Fuel and Your Engine" Form SEBD0717 for information about fuel properties, such as ignition
quality, gravity/density, viscosity, cloud point, sulfur content, etc.

Fuel Cetane Requirement

The minimum fuel cetane number recommended for the direct injection engine is 40.

Fuel Cloud Point

Fuel waxing can plug the fuel filters in cold weather. The fuel cloud point must be below the temperature of the
surrounding air to prevent filter waxing and power loss. Fuel heating attachments are available from your
Caterpillar dealer to minimize fuel filter waxing.

Fuel Sulfur Content

The percentage of sulfur in the fuel will affect the engine oil recommendations. Fuel sulfur is chemically
changed during combustion to form both sulfurous and sulfuric acid. These acids chemically attack metal
surfaces and cause corrosive wear.

Certain additives used in lubricating oils contain alkaline compounds that are formulated to neutralize these
acids. The measure of this reserve alkalinity in a lubricating oil is known as its Total Base Number (TBN).

Higher engine oil TBN values are essential to neutralize the acids from combustion gases and to minimize
corrosive wear.

Any API classification engine oil should have sufficient TBN for fuels with less than 0.5% sulfur.

If the fuel has over 0.5% sulfur content, the engine oil must have a TBN of 20 times the percentage of fuel sulfur
as measured by the ASTM (American Society of Testing Materials) D-2896 method. (ASTM D-2896 can
normally be found at your local technological society, library or college.)

If the sulfur content in the fuel is greater than 1.5% by weight, use an oil with a TBN of 30 and reduce the oil
change interval by one half.

Periodically request fuel sulfur content information from your fuel supplier. Fuel sulfur content can change with
each bulk delivery.

for more information on oil, fuel sulfur content, etc., refer to "Oil and Your Engine," Form SEBD0640 or contact
your Caterpillar dealer.

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Operation and Maintenance Manual

966C AND 966R WHEEL LOADERS

Media Number -SEBU6290-00 Publication Date -01/02/1990 Date Updated -11/10/2001

Scheduled Oil Sampling (S·O·S)

Use Scheduled Oil Sampling (S·O·S) to monitor the condition and maintenance requirements of your
equipment. Each oil sample should be taken when the oil is warm and well mixed, to ensure that the sample is
representative of the oil in the compartment.

Obtain S·O·S Samples

To compliment a good preventive maintenance program, Caterpillar recommends using S·O·S at regular
scheduled intervals to monitor the condition and maintenance requirements of your equipment. Each oil sample
should be taken when the oil is warm and well mixed to ensure that the sample is representative of the oil in the
compartment.

There are several methods used to obtain S·O·S samples.

* Use a sampling gun inserted into the sump.
* Use a valve installed for samples.
* Use the drain stream when changing oil.

NOTE: Caterpillar recommends using the first or second method. If these methods are not feasible, then use the

drain stream.

When using the drain stream to obtain the oil sample, do not sample from the first or final draining. The oil at
the beginning or end of the drain stream is not mixed well enough to be representative of the oil in the
compartment.

S·O·S Analysis

S·O·S is composed of three basic tests:

* Wear Analysis
* Chemical and Physical Tests
* Oil Condition Analysis

Wear element analysis uses spectrophotometry to monitor component wear by identifying and measuring
concentrations, in parts per million, of wear elements present in the oil. Impending failures can be identified
when test results deviate from concentration levels established as acceptable, based on normal wear.

Chemical and physical tests detect the presence of water, fuel and glycol (antifreeze) in the oil.

Oil condition is evaluated with infrared analysis. This test determines the presence and measures the amount of
soot, sulfur products, oxidation, and nitration products in the oil. Infrared analysis can also assist in customizing

(reducing, maintaining or extending) oil change intervals for particular conditions and applications.

Infrared analysis should always be accompanied by wear element analysis and chemical and physical tests to
assure accurate diagnosis.

Consult your Caterpillar dealer for complete information and assistance in establishing a Scheduled Oil
Sampling program for your equipment.

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Operation and Maintenance Manual

966C AND 966R WHEEL LOADERS

Media Number -SEBU6290-00 Publication Date -01/02/1990 Date Updated -11/10/2001

Lubricant Specifications

Lubricant Information

Certain abbreviations follow S.A.E. J754 nomenclature and some classifications follow S.A.E. J183
abbreviations. The MIL specifications are U.S.A. Military Specifications. The definitions other than Caterpillar's
will be of assistance in purchasing lubricants. The recommended oil viscosities can be found in the "Lubricant
Viscosities" chart in this publication.

Engine Oils

Caterpillar has two oil formulations to provide maximum performance and life in your engine.

Engine Oil (EO)

* Cat Engine Oil (EO)

If an oil other than EO is to be used, use the following guideline:

* API specifications CE, CE/SF, or CE/SG

CAT Engine Oil (EO) is a lubricant meeting the industry standards for both gasoline and diesel requirements.
This oil has 10 TBN and a 1.2% sulfated ash level.

Oil with these specifications may require shortened oil change periods as determined by close monitoring of oil
condition with Scheduled Oil Sampling (S·O·S) and infrared analysis.

NOTE: The percentage of sulfur in the fuel will affect the engine oil recommendations. For fuel sulfur effects,
the Infrared Analysis and the ASTM D2896 procedure can be used to evaluate the residual neutralization
properties of and engine oil. The sulfur products formation depends on the fuel sulfur content, oil formulation,
crankcase blowby, engine operating conditions and ambient temperature.

The Caterpillar 20 times rule for TBN versus fuel sulfur is a general requirement, but it can be modified by used
oil analysis. The effectiveness of an oil formulation will depend on the additive package. A balanced additive
package oil of a lower TBN can be as effective in fuel sulfur neutralization and overall performance as some oils
with higher TBN values which have additives just for increased TBN. The used oil analysis can show these
results.

For more information on oil and fuel sulfur content, refer to "Oil and Your Engine", form SEBD0640 and "EMA
Lubricating Oils Data Book", form SEBU6310.

NOTICE

Failure to follow these recommendations can cause shortened engine
life due to carbon deposits or excessive wear.

Always consult with your Caterpillar dealer for the latest lubrication recommendations.

* Cat Diesel Engine Oil (DEO)

Cat Diesel Engine Oil is specially formulated for Caterpillar Diesel Engines, to reduce piston and ring deposits
and thus provide longer engine life and stable oil control.

If an oil other than DEO is to be used, use the following guideline:

* API specifications CD/SD, CD/SE, CD/SF, CD/SG or CD
* European specification CCMC D4 or D5
* Military specifications MIL-L-2104E or MIL-L-2104D

CAT Diesel Engine Oil (DEO) is blended with a diesel engine type additive with 14 TBN (Total Base Number)
and 1.8% sulfated ash level.

Hydraulic Oil (HYDO)

Cat Hydraulic Oil should be used to achieve maximum life and performance from hydraulic system components
and hydrostatic transmissions. Use of Cat Hydraulic Oil is recommended in most hydraulic and hydrostatic
systems.

* Cat Hydraulic Oil (HYDO)

If different viscosities are required because of extreme ambient temperatures, the following oils can be used, use
Caterpillar's:

* Cat Engine Oil (EO)
* Cat Diesel Engine Oil (DEO)

If Cat Hydraulic Oil or Engine Oil is not available, use an engine oil that meets one of these API service
classifications; CC, CC/SF, CD/SF, CD/SG, CD, CE/SF, CE/SG or CE. Any military specification of MIL-L­2104 oils can also be used.

Industrial-type hydraulic oils that are certified by the oil supplier to have antiwear, antifoam, antirust and
antioxidation additives for heavy duty use are also acceptable.

Transmission Oil (TDTO)

Maximum transmission life and performance can be achieved, by using Caterpillar's:

* Cat Transmission/Drive Train Oil (TDTO)

NOTE: Failure to follow this recommendation can cause shortened transmission life due to material incapability

and inadequate frictional requirements for disk materials.

If circumstances require the use of an oil other than Cat Transmission/Drive Train Oil, use an oil that meets API
CD/TO-2 or military specification MIL-L-2104D.

NOTE: Multi-grade oils are not blended for use in transmissions. Multi-grade oils which use high molecular
weight polymers as viscosity index improvers lose their viscosity effectiveness by permanent and temporary
shear of the VI improver.

NOTICE

This oil is formulated for transmission and Drive Trains only, and
should not be used in engines. Shortened engine life will result.

Differential and Final Drive Oil (TDTO)

For maximum life and performance of the front and rear axle components, select the correct viscosity of
Caterpillar's:

* Cat Transmission/Drive Train Oil (TDTO)

If circumstances require the use of an oil other than Cat, use an API classification CD/TO-2 (MIL-L-2104D).

Gear Oil (GO)

Use Gear Oil for bucket lower pivot pins points. Caterpillar gear oil will maximize life of Caterpillar equipment,
use:

* Cat Gear Oil (GO)

Cat Gear Oil offers maximum protection against the scoring and pitting of gear teeth and rolling element
bearings.

Cat Gear Oil can also provide excellent stability under high temperature conditions and has superior low
temperature performance. It will also give protection against rust and corrosion.

If a lubricant other than GO must be used, select an oil that meets API classification GL-5 or military
specification MIL-L-2105C.

Cat Lubricating Grease

Caterpillar has greases for all applications.

* Cat Multipurpose Molybdenum Grease (MPGM)

Use MPGM for heavily loaded bearings and joints where an extreme pressure grease will maximize the life of
Caterpillar equipment. This NLGI No. 2 grade is suitable for most temperatures.

If MPGM is not available, use a multipurpose type grease which contains 3 to 5% molybdenum.

* Cat Multipurpose Lithium Grease (MPGL) (non-extreme pressure)

This NLGI No. 2 grade is recommended for light duty automotive type applications where a high temperature
[up to 175°C (350°F)] is required. This grease offers excellent mechanical stability, high resistance to oxidation,
good rust protection and excellent breakaway torque.

If this grease is not available, use a similar multipurpose grease.

* Cat Special Purpose Grease (SPG)

This grease is recommended for high temperature anti-friction bearings in such applications as electric motors,
alternators, fan drives, starters and generators. The grease is a NLGI No. 2 grade.

If this grease is not available, use a similar multipurpose grease suitable for anti-friction bearings.