988H Wheel Loader Operator Controls Caterpillar


Operator Controls
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988H Wheel Loader [SEBU7808]
OPERATOR STATION
988H Wheel Loader Operator Controls
1.1. Overhead Switch Panels
2.2. Front Window Wiper and Washer (1)
3.2. Ride Control (2)
4.2. Torque Converter Lockup Control (3)
5.2. Beacon Switch (4)
6.2. Autoshift Control (5)
7.2. Rear Window Wiper/Washer Switch (6)
8.2. Fan Speed Switch (7)
9.2. Heating and Air Conditioning Switch (8)
10.2. Temperature Control (9)
11.2. HID Light Switch (10)
12.2. Stairway Access Light (11)
13.2. Main Lighting Switch (12)
14.2. Reduced Rimpull Switch (13)
15.3. Type 1 BXY1-1899
16.3. Type 2 BXY1900-UP
17.3. Operating with Reduced Rimpull
18.2. Loose Material Control (14)
19.2. Kickout and Positioner Control (15)
20.2. Override Switch for the Automatic Lubrication System (16)
21.2. Reversing Fan Switch (17)
22.2. Hazard Light Switch (18)
23.1. Steering Control Console
24.2. STIC Control (1)
25.3. Speed Control
26.3. Direction Control
27.3. Steering Control
28.3. STIC Control Lock
29.2. Armrest (2)
30.1. Electrohydraulic Control Console
31.2. Armrest (1)
32.2. Third Function Hydraulic Control (2)
33.2. Lift Control (3)
34.2. Horn (4)
35.2. Tilt Control (5)
36.2. Hydraulic Lockout Control (6)
37.2. Lighter (7)
38.2. Ashtray (8)
39.2. Rimpull Select Switch (9A) (If Equipped)
40.2. Fuel Management Switch (9B) (If Equipped)
41.2. Store Button (10)
42.2. Set/Decel Switch (11)
43.2. Resume/Accel Switch (12)
44.2. Third Function Implement Lockout Control (13)
45.1. Instrument Panel
46.2. Gauge Display (1)
47.2. Speedometer/Tachometer Display (2)
48.2. Indicators (3)
49.2. Operator Mode Switch (4)
50.2. Throttle Lock Control (5)
51.3. Setting the Throttle Lock
52.3. Canceling the Throttle Setting
53.3. Accelerate or Decelerate
54.2. Left Brake Pedal and Impeller Clutch (6)
55.2. Engine Brake Control (7)
56.3. Engine Overspeed Protection
57.2. Right Brake Pedal (8)
58.2. Engine Start Switch (9)
59.2. Throttle Control (10)
60.2. Parking Brake (11)
61.2. Turn Signals (12)

Note: Your machine may not be equipped with all of the controls that are discussed in this topic.

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

Illustrations guide the operator through correct procedures of checking, starting, operating, and stopping the machine. Operating techniques that are outlined in this publication are basic. Skill and techniques develop as the operator gains knowledge of the machine and the capabilities of the machine.

Overhead Switch Panels




Illustration 1g00999856



Illustration 2g00999884

(1) Front Window Wiper and Washer

(2) Ride Control

(3) Torque Converter Lockup Control

(4) Beacon Switch

(5) Autoshift Control

(6) Rear Window Wiper/Washer Switch

(7) Fan Speed Switch

(8) Heating and Air Conditioning Switch

(9) Temperature Control

(10) HID Light Switch

(11) Stairway Access Light

(12) Main Lighting Switch

(13) Reduced Rimpull Switch

(14) Loose Material Control

(15) Kickout and Positioner Control

(16) Override Switch for the Automatic Lubrication System (If equipped)

(17) Reversing Fan Switch

(18) Hazard Light Switch

Front Window Wiper and Washer (1)


Front Window Wiper and Washer - Turn the knob clockwise in order to turn on the window wiper. Push the knob in order to activate the window washer. Spring force will return the knob after use.

Note: For machines that have intermittent front wipers, there are several positions that will affect the wipers.

Turn the knob in a clockwise direction. The following settings may be selected: OFF position, LONG DELAY position, INTERMITTENT DELAY position, SHORT DELAY position, LOW position and HIGH position.

Ride Control (2)


Ride Control Switch (If Equipped) - Travel at high speeds over rough terrain causes bucket movement and a swinging motion. The ride control system acts as a shock absorber by dampening forces from the bucket. This absorption helps to stabilize the entire machine.

Note: For normal operation, the ride control switch should be placed in either the AUTOMATIC position or in the OFF position during the loading cycle. Failure to move the ride control switch to the recommented position could result in damage to the machine.


AUTOMATIC - Push the top of the ride control switch in order to turn on the automatic ride control. When the switch for the ride control system is in the AUTOMATIC position, an indicator light on the front dash panel comes on. A light on the switch comes on also. The automatic ride control turns on when the ground speed exceeds 9.6 km/h (6 mph). The automatic ride control turns off when the ground speed is less than 9.6 km/h (6 mph).

OFF - Push the ride control switch to the middle position in order to turn off the ride control system.

SERVICE MODE - Push the bottom of the ride control switch in order to turn on the ride control system for servicing or charging the ride control accumulators. The machine should not be operated in this mode.

Torque Converter Lockup Control (3)


Torque Converter Lockup Switch - Pressing the top of the switch enables the lockup clutch (if installed) for second gear. Lockup clutch is never enabled for first gear, and is always enabled for third and forth gears, unless de-activated in Electronic Technician ET. When the engine speed is in the correct speed range, the torque converter will lock up. The indicator light on the instrument panel will illuminate when the torque converter lockup switch is activated.

This feature provides more efficient operation for high speeds and for carrying loads.

Note: The torque converter lockup switch must be activated in order to use the engine brake control (if equipped).

Beacon Switch (4)


Rotating Beacon - Press the top of switch in order to turn on the rotating beacon. Press the bottom of the switch in order to turn off the rotating beacon.

Autoshift Control (5)


Manual Mode - The gear speed is selected by rotating the switch to the manual position.


Automatic Mode - The operator selects the highest desired operating speed from the options on the switch. The control selects the proper transmission gear according to the ground speed of the machine.

Note: Do not use the autoshift mode when the fuel management switch (if equipped) is enabled.

Pressing the upshift gear speed switch on the STIC control will cause the machine to shift into the next highest gear.

Pressing the downshift gear speed switch on the STIC control will cause the machine to shift into the next lowest gear.

The indicator light that is located on the instrument panel will illuminate when the autoshift control is activated.

The downshift gear speed switch on the STIC control is active in all gears. The downshift gear speed switch on the STIC control can cause transmission downshifts at machine speeds that are higher than normal.

Pressing the downshift gear speed switch on the STIC control will cause a downshift of one gear. The downshift will only occur if the machine speed and the engine speed will not result in an engine overspeed condition.

Holding down the downshift gear speed switch on the STIC control will cause the transmission to continue to downshift as the machine speed decreases.

The transmission will remain in the downshifted gear for 3 seconds after the downshift switch is released. Then, automatic shifting is resumed.

Turn switch (5) to a selected gear speed in order to activate the autoshift function. The transmission will shift from first gear through fourth gear automatically. The highest gear that will be used is determined by the selection on the switch.

As the machine slows, the transmission will automatically downshift. The transmission will not shift lower than second gear.

Note: The 988H does not have a separate Quick-Shift function as the former 988F model. In the automatic mode of autoshift, the transmission will automatically shift from the first gear to the second gear. This automatic shifting happens when the operator shifts the direction from forward to reverse. When the operator shifts from reverse to forward, the transmission will remain in second gear. This feature only functions when the machine is in first gear. A transmission quick-shift can only occur when the operator shifts the direction from forward to reverse. This feature does not affect any directional shift in any of the other gears.

Rear Window Wiper/Washer Switch (6)


Rear Window Wiper and Washer - Turn the knob clockwise in order to turn on the window wiper. Push the knob in order to activate the window washer. Spring force will return the knob after use.

Note: For machines that have intermittent front wipers, there are several positions that will affect the wipers.

Turn the knob in a clockwise direction. The following settings may be selected: OFF position, LONG DELAY position, INTERMITTENT DELAY position, SHORT DELAY position, LOW position and HIGH position.

Fan Speed Switch (7)

The heating or the air conditioning must be activated in order for the fan to operate.


Fan Speed Switch - The switch controls the speed of the blower fan motor for the heating and air conditioning system.

Low - Press the top of the switch.

Medium - Move the switch to the middle position.

High - Press the bottom of the switch.

Heating and Air Conditioning Switch (8)

Air Conditioner - Press the top of the switch.

Off - Move the switch to the center position in order to deactivate the heating and air conditioning system. This action will also deactivate the blower fan motor.

Heater - Press the bottom of the switch.

Temperature Control (9)


Temperature Variable Control - Turn the knob clockwise for warmer air. Turn the knob counterclockwise for cooler air.

HID Light Switch (10)

Press the top of the switch in order to turn on the lights. Press the bottom of the switch in order to turn off the lights.

Stairway Access Light (11)


Stairway Access Light - Press the top of switch in order to turn on the stairway access light. Press the bottom of the switch in order to turn off the stairway access light.



Illustration 3g00841327

Note: The stairway access light can also be controlled by the switch next to the engine shutdown control. The engine shutdown control is located on the left rear bumper.

Main Lighting Switch (12)


Off - Rotate the knob counterclockwise in order to shut off all of the lights.


Parking Lights and Cab Interior Lights - Rotate the knob clockwise to the first position in order to turn on both the parking lights and the interior cab lights.


Roading Lights - Rotate the knob clockwise to the second position in order to turn on the roading lights.


Rear Floodlights - Rotate the knob clockwise to the third position in order to turn on the rear floodlights.


Front Floodlights - Rotate the knob clockwise to the fourth position in order to turn on front floodlights.

Reduced Rimpull Switch (13)

The reduced rimpull switch reduces the potential for wheel slippage without reducing the hydraulic efficiency. The reduced rimpull switch is a four-position switch. Each setting corresponds to a maximum allowable percentage of maximum rimpull.

There are two types of settings for the maximum allowable percentage of maximum rimpull.

Type 1 BXY1-1899




Illustration 4g01382071

Machines that are equipped with the rimpull switch, located on the right side of the control console

Type 2 BXY1900-UP




Illustration 5g01382090

Machines that are equipped with the fuel management switch, located on the right side of the control console

Note: The rimpull settings may be adjusted in order to meet operating conditions.

ReferenceTo change the maximum allowable percentages for each setting of the rimpull switch, refer to Testing and Adjusting, RENR3095, "Power Train".

Operating with Reduced Rimpull

To select a reduced rimpull setting, move the reduced rimpull switch to the desired setting and move the reduced or maximum rimpull switch that is located on the right side control console to the REDUCED position.

If the machine is in first speed, the reduced rimpull switch will provide an impeller clutch pressure which limits the rimpull to the desired level when the left brake pedal is fully released.

Depressing the left brake pedal will further reduce rimpull from the selected percentage. The rimpull that is commanded by the fully released pedal will equal the reduced rimpull that is selected on the reduced rimpull switch.

When a lower rimpull is selected, pedal travel will result in a more gradual decrease in rimpull.

If the machine is not in first speed, the impeller clutch pressure will remain at the maximum level until the transmission is placed into first speed.

The reduced rimpull switch will continue to limit rimpull until the transmission is shifted out of first speed or until the reduced or maximum rimpull switch is placed in the MAXIMUM position.

Loose Material Control (14)


Loose Material Mode - When you are loading loose material, press the top of the switch in order to activate the loose material mode. The loose material mode provides maximum hydraulic pump flow for faster loading in loose materials.

Note: Do not use the loose material mode in digging conditions that are tough. In the normal mode for tougher digging, hydraulic pump flow is reduced for better performance.

The indicator light that is located on the instrument panel will illuminate when the switch is activated.

Kickout and Positioner Control (15)


Lift Kickout Position and Lower Kickout Position - To set the lift kickout, raise the bucket to the desired position above the midway point. Then depress the bottom of the kickout set switch. The boom will return to the programmed position when the raise detent is activated and the boom is below the kickout position.

To set the lower kickout, lower the bucket to the desired position below the midway point. Then depress the bottom of the kickout set switch. The boom will return to the programmed position when the float detent is activated and the boom is at least a foot above the kickout position.

Note: If the boom is a foot or less above the lower kickout position, placing the lift control lever in the float detent will cause the bucket to float and the bucket will hit the ground.


Bucket Kickout Position - To set the bucket kickout position, tilt the bucket to the desired digging angle and depress the top of the kickout set switch. The bucket will return to the programmed position when the tilt control lever is placed in the tilt back detent and the bucket is dumped beyond the kickout.

Override Switch for the Automatic Lubrication System (16)

Press the top of the switch and release the switch. This action will override the automatic lubrication system and dispense grease to the lubrication points. After lubrication is complete, the automatic lubrication system will return to normal operation.

Reversing Fan Switch (17)

The reversing fan will reverse the direction of the cooling fan in order to purge debris that is trapped in the radiator grill.

The auto reversing fan automatically reverses the cooling fan for 25 seconds after every 30 minute interval. Then, the cooling fan returns to the normal direction.

Switch (17) provides a manual override control that will immediately initiate the purge cycle when the engine is on. Press the top of the switch and release the switch in order to manually activate the reversing fan. Then, the cycle will reset the timer for the automatic purge cycle.

Note: Your machine may be equipped with a feature that will not allow the cooling fan to reverse automatically when the parking brake is applied. Pressing the reversing fan switch (17) will override this feature.

Hazard Light Switch (18)


Hazard Lights - Press the top of the switch in order to turn on the hazard lights. Press the bottom of the switch in order to turn off the hazard lights.

Steering Control Console




Illustration 6g00998180

(1) STIC Control

(2) Armrest

STIC Control (1)

The STIC Control controls the following machine functions: Steering, Direction Control and Speed Control.

Speed Control

Push upshift switch (1A) in order to shift the machine into the next highest speed.

Push downshift switch (1B) in order to shift the machine into the next lowest speed.

  • "1" indicates First Speed.

  • "2" indicates Second Speed.

  • "3" indicates Third Speed.

Note: When the parking brake is engaged, the machine can only be shifted into second speed or into third speed.

Direction Control

REVERSE - Move the top of the trigger switch (1C) to "R". This action will enable the machine to move in the reverse direction.

NEUTRAL - Move the trigger switch (1C) to "N". This action will disengage the transmission.

FORWARD - Move the bottom of the trigger switch (1C) to "F". This action will enable the machine to move in the forward direction.

The active transmission direction will be shown on the speedometer.

Steering Control

Note: The steering frame lock must be in the unlocked position in order to steer the machine.

Move the STIC control to the right of the center position in order to steer the machine to the right.

Move the STIC control to the left of the center position in order to steer the machine to the left.

Note: When you release the STIC control, the STIC control will return to the center position. However, the machine will maintain the current travel direction.

STIC Control Lock

Move the lock lever (1D) all the way to the left in order to lock the STIC control mechanically. The transmission controls will be electronically locked.

Move the lock lever (1D) all the way to the front in order to unlock the STIC control. The transmission controls will unlock.

Armrest (2)

Push down the knob (2A) in order to move the control console forward or backward. Release the knob in order to lock the console into position.

Turn the knobs (2B) counterclockwise in order to adjust the height and the angle of the armrest. Turn the knobs clockwise in order to secure the armrest in the position that is desired.

Electrohydraulic Control Console

Note: Your machine may not be equipped with all of the controls that are discussed in this topic.




Illustration 7g00998273

Standard control console

(1) Armrest

(1A) (1B) (1C) Adjustment knobs for the console and armrest

(2) Third function hydraulic control

(3) Lift control

(4) Horn

(5) Tilt control

(6) Hydraulic lockout control

(7) Lighter

(8) Ashtray

(9A) Rimpull select switch (If equipped)

(9B) Fuel management switch (If equipped)

(10) Store button

(11) Set/Decel switch

(12) Resume/Accel switch

(13) Auxiliary hydraulic lockout control




Illustration 8g00999678

(3) Lift control

(4) Horn

(5) Tilt control

(6) Hydraulic lockout control

(9A) Rimpull select switch (If equipped)

(9B) Fuel management switch (If equipped)

(10) Store button

(11) Set/Decel switch

(12) Resume/Accel switch

Armrest (1)

Push down on the knob (1B) in order to move the control console forward or backward. Release the knob in order to lock the console into position.

Turn the knobs (1A) counterclockwise in order to adjust the height and the angle of the armrest. Turn the knobs clockwise in order to secure the armrest in the position that is desired.

Turn the knob (1C) counterclockwise in order to adjust the height of the implement control. Turn the knob clockwise in order to secure the implement control in the position that is desired.

Third Function Hydraulic Control (2)

Note: Do not use any lubricants on any part of the implement controls.

Pull back the lever in order to pressurize the left auxiliary hydraulic line. Push the lever forward in order to pressurize the right auxiliary hydraulic line.

Lift Control (3)

Note: Do not use any lubricants on any part of the implement controls.


FLOAT - Push the bucket lift lever forward through the detent. The bucket will lower to the ground. The bucket will float with the contour of the ground.

The bucket lift lever will remain in the FLOAT position until the lever is moved out of the detent. The bucket lift lever will return to the HOLD position when the lever is released.


NOTICE

NEVER use FLOAT position to lower a loaded bucket.

Machine damage can result from bucket falling too fast.



LOWER - Push the bucket lift lever forward in order to lower the bucket. The bucket lift lever will return to the HOLD position when the lever is released.


RAISE - Pull the bucket lift lever backward in order to raise the bucket. Release the bucket lift lever in order to stop lifting the bucket. The bucket lift lever will return to the HOLD position when the lever is released.

The bucket lift lever is detented in the fully raised position. The bucket lift lever will stay in the detent and the bucket will continue to rise until the bucket reaches the lift kickout height. Then, the bucket lift lever will return to the HOLD position.

Horn (4)


Horn - Press the button in order to sound the horn. Use the horn in order to alert personnel.

Tilt Control (5)

Note: Do not use any lubricants on any part of the implement controls.


DUMP - Push the bucket tilt lever forward in order to dump a load from the bucket.


HOLD - The bucket tilt lever will return to the HOLD position when the lever is released from the DUMP position or from the TILT BACK position. The bucket will remain in the selected position.


TILT BACK - Pull the bucket tilt lever backward in order to tilt back the bucket.

The bucket tilt lever is detented in the full TILT BACK position. The bucket tilt lever will stay detented and the bucket will continue to tilt back until the bucket reaches the preset digging angle. The operator sets the preset digging angle with the tilt kickout. Then, the bucket tilt lever returns to the HOLD position.

Hydraulic Lockout Control (6)


LOCKED - Press the top of the switch in order to lock the implement controls electronically.


UNLOCKED - Press the bottom of the switch in order to unlock the implement controls electronically.

Lighter (7)


Lighter - Push the lighter inward and release the lighter. The lighter will move outward slightly when the lighter is ready for use.

Ashtray (8)

Pull out on the ashtray in order to open the ashtray.

Rimpull Select Switch (9A) (If Equipped)


Maximum Rimpull - To provide maximum rimpull, press the top of the switch. Maximum rimpull will be provided regardless of the setting of the rimpull select switch.


Reduced Rimpull - To provide reduced rimpull, press the bottom of the switch. The machine will return to the selected setting of the rimpull select switch, if the transmission is in first speed. If the transmission is not in first speed, the machine will remain at maximum rimpull.

Refer to Operation and Maintenance Manual, "Operator Controls - Overhead Switch Panels" for information on the operation of the rimpull select switch.

Fuel Management Switch (9B) (If Equipped)


Fuel Management Switch - This switch is a three-position rocker switch that is designed to improve fuel consumption with minimal impact on productivity. The fuel management switch limits the engine speed when the machine is not digging. When the machine is digging, the machine will return to normal operation for maximum production.

The fuel management function is not recommended for load and carry applications.

Maximum Production - The middle position of the switch will allow your machine to operate at the highest potential for productivity.

Balanced Fuel Management - The bottom position of the switch will allow your machine to operate in a more economical mode that will reduce fuel consumption with a minimal reduction in performance. When the balanced fuel management mode is active, an indicator will illuminate on the fuel management switch.

Maximum Fuel Management - The top position of the switch will allow your machine to operate in the most economical mode that will reduce fuel consumption with a minimal reduction in performance. When the maximum fuel management mode is active, an indicator will illuminate on the fuel management switch.

Note: Do not use the autoshift control when the fuel managementfunction is enabled. The transmission will not shift properly in thefuel management mode when autoshift control is enabled.

Note: Set the throttle lock for the engine before you engage the transmission in order to avoid a surge in engine speed or a surge in machine acceleration. Set the throttle lock for the engine before you operate the hydraulics in order to avoid a surge in engine speed or a surge in machine acceleration.

Refer to Service Manual, RENR6217, "Electronic Control System Components" for additional information.

Store Button (10)


STORE - The "STORE" key is used with the payload control system. Use the "STORE" key to store payload data. Use the "STORE" key to make a selection from a menu. Use the "STORE" key to enter a number.

Set/Decel Switch (11)


Set/Decel Switch - Press the throttle lock control to the ON position. Refer to Operation and Maintenance Manual, "Operator Controls - Instrument Panel". Press the set/decel switch and release the switch in order to set the throttle. Once the speed is set, press the switch and hold the switch in order to decelerate. The machine will decelerate. When the switch is released, the previous setting will resume. The throttle setting may be canceled by pressing the right brake pedal or turning the throttle lock control to the OFF position.

Resume/Accel Switch (12)


Resume/Accel Switch - Press the throttle lock control to the ON position. Refer to Operation and Maintenance Manual, "Operator Controls - Instrument Panel". Press the set/decel switch and release the switch in order to set the throttle. In order to accelerate, press the resume/accel switch and hold the switch. The machine will accelerate. When the switch is released, the previous setting will resume. The throttle setting may be canceled by pressing the right brake pedal or turning the throttle lock control to the OFF position.

Third Function Implement Lockout Control (13)


UNLOCKED - Press the top of the switch in order to unlock the third function. Release the switch in order to lock the third function.

Instrument Panel

Note: Your machine may not be equipped with all of the controls that are discussed in this topic.




Illustration 9g01125177

(1) Gauge Display

(2) Speedometer/Tachometer Display

(3) Indicators

(4) Operator Mode Switch

(5) Throttle Lock Control

(6) Service Brake Control

(7) Engine Brake Control

(8) Service Brake Control

(9) Engine Start Switch

(10) Throttle Control

(11) Parking Brake Control

(12) Turn Signals

Gauge Display (1)

Refer to Operation and Maintenance Manual, "Monitoring System" for details on the gauge display.

Speedometer/Tachometer Display (2)

Refer to Operation and Maintenance Manual, "Monitoring System" for details on the speedometer/tachometer display.

Indicators (3)

Refer to Operation and Maintenance Manual, "Monitoring System" for details on the indicators.

Operator Mode Switch (4)

Press the switch in order to change the information that is displayed within the Monitoring System. Refer to Operation and Maintenance Manual, "Monitoring System" for additional information.

Throttle Lock Control (5)


Throttle Lock Control - The throttle lock switch is located on the left side of the instrument panel. Engage the switch in order to keep the engine at the current rpm. When the throttle lock is active, an indicator light will illuminate on the front dash. Use the throttle lock control on long hauls in order to avoid driver fatigue. Fatigue may result from depressing the throttle control for an extended amount of time.

On - Push the top of the switch in order to engage the throttle lock control.

Off - To release the throttle lock control, push the bottom of the switch or slightly depress the right brake pedal.

Setting the Throttle Lock

The throttle lock can be set for a desired rpm.

  1. Push the throttle lock control to the ON position.

  1. The indicator light for the throttle lock will illuminate when the on/off switch is in the ON position.

  1. Depress the throttle control in order to achieve the desired engine rpm.



    Illustration 10g00998161

  1. Depress "Set/Decel" switch (1) in order to set the throttle.

Canceling the Throttle Setting

The throttle setting may be canceled by depressing the right brake pedal or by moving the on/off switch to the OFF position.

When the right brake pedal is used to cancel a throttle setting, press "Resume/Accel" switch (2) in order to resume the throttle setting.

Accelerate or Decelerate

In order to accelerate to a higher rpm, continue pressing the Resume/Accel switch. Once the switch is released, the previous setting will resume.

In order to decelerate to a lower rpm, continue pressing the Set/Decel switch. Once the switch is released, the previous setting will resume.

Left Brake Pedal and Impeller Clutch (6)

The left brake pedal controls both the brake pressure and the impeller clutch pressure.

Partially depress the left brake pedal in order to reduce the impeller clutch pressure. The brake pressure is increased as the operator pushes down the pedal farther. This feature allows the operator to control the maximum drive train torque. Lowering the maximum drive train torque supplies more engine power to the implements and to the steering.

When the operator is digging, the left brake pedal can be used to stop any excessive tire slip.

Engine Brake Control (7)

The engine brake control is operated by using a pedal that is located in the cab of the operator compartment. The engine brake control aids in preventing excessive wear on the service brakes by decreasing the speed of the engine.

The engine brake control should be used before applying the right service brake pedal. The engine brake control should not be used with the left brake pedal.

Apply the engine brake control when the machine is traveling downhill. The transmission can be downshifted while you are using the engine brake control. The right service brake pedal can also be applied, if necessary.

Note: The torque converter lockup switch should be in the ON position in order to use the engine brake control.

Engine Overspeed Protection

If your machine is equipped with engine brake control, the engine has overspeed protection. The engine brake will automatically be activated if engine speed exceeds 2275 rpm. When engine speed drops below 1900 rpm, the engine brake will automatically be deactivated.

ReferenceRefer to the topic "Torque Converter Lockup Control" in Operation and Maintenance Manual, "Operator Controls (Overhead Switch Panels)" for more information.

Right Brake Pedal (8)

Right Brake Pedal - The right brake pedal decelerates the machine.


Engage - Depress the right brake pedal for normal braking of the machine.


Disengage - Release the right pedal in order to release the brakes.

Engine Start Switch (9)


OFF - When you inserting or removing the engine start switch key, the engine start switch must be in the OFF position. To disconnect the power to the electrical circuits in the cab, turn the engine start switch to the OFF position. Also, turn the engine start switch to the OFF position in order to stop the engine.


ON - To activate the electrical circuits in the cab, turn the engine start switch clockwise to the ON position.


START - To start the engine, turn the engine start switch clockwise to the START position. When the engine start switch key is released, the engine start switch will return to the ON position.

Note: If the engine fails to start, return the engine start switch to the OFF position. This procedure must be done before you attempt to start the engine again.

Throttle Control (10)


Depressing the Throttle Control - Depress the throttle control in order to increase the engine speed.


Releasing the Throttle Control - Release the throttle control in order to decrease the engine speed.

Parking Brake (11)


Parking Brake - The parking brake knob is located next to the engine start switch on the right side of the dashboard. Use the parking brake after the machine has been stopped.

Pull the knob outward in order to engage the parking brake. Push the knob inward in order to release the parking brake.

Turn Signals (12)


Turn Signals (if equipped) - Move the switch to the left in order to turn on the left turn signal. Move the switch to the right in order to turn on the right turn signal.

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3044C Industrial Engine and Engines for Caterpillar Built Machines Engine Oil Cooler - Install
854G Wheel Tractor and 992G Wheel Loader Power Train Transmission Hydraulic Control Valve - Install
3044C Industrial Engine and Engines for Caterpillar Built Machines Engine Oil Cooler - Remove
3044C Industrial Engine and Engines for Caterpillar Built Machines Fuel Injection Lines - Remove and Install - Turbocharged Engines
980G Series II Wheel Loader Cooling System Coolant Sample (Level 1) - Obtain
854G Wheel Tractor and 992G Wheel Loader Power Train Axle Shaft - Remove and Install
3044C Industrial Engine and Engines for Caterpillar Built Machines Turbocharger - Install
854G Wheel Tractor and 992G Wheel Loader Power Train Final Drive and Wheel - Assemble
988G Wheel Loader Engine Oil Level - Check
938G Wheel Loader and IT38G Integrated Toolcarrier Operation Information
3044C Industrial Engine and Engines for Caterpillar Built Machines Inlet and Exhaust Valve Springs - Remove and Install
854G Wheel Tractor and 992G Wheel Loader Power Train Torque Converter - Disassemble
816F Landfill Compactor, 815F Soil Compactor and 814F Wheel Dozer Engine Starting
3054E Industrial Engine Electric Starting Motor - Remove and Install
3044C Industrial Engine and Engines for Caterpillar Built Machines Inlet and Exhaust Valves - Remove and Install
966G II and 972G II Wheel Loaders Work Tool Positioner
3044C Industrial Engine and Engines for Caterpillar Built Machines Inlet and Exhaust Valve Guides - Remove and Install
TH210 and TH215 Telehandlers Cooling System Coolant Extender (ELC) - Add