793F

Manual de Operacin y Mantenimiento 793F Off-Highway Truck Nmero de medio -SEBU9357-00 Fecha de publicacin -01/03/2015 Fecha de actualizacin -19/03/2015

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Operator Controls

SMCS - 7300; 7451

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

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Pgina 1 de 26Service Information System

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Illustration 1

Top view of the Operator Compartment

Steering Wheel Column Controls and Control Pedals

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Illustration 2 g01768954

(1) Steering wheel control

(2) Secondary brake control pedal

(3) Service brake control pedal

(4) Accelerator pedal

(5) Multifunction switch

(6) Steering wheel tilt control and telescope control (lever)



(7) Manual retarder control (lever)

Steering Wheel Control (1)

Steering System - This machine is

equipped with a closed centered,

hydraulic steering system. There is no

mechanical connection between the

steering wheel and steering cylinders

that move the front wheels. Under

normal conditions, when the engine is

running, movement of the steering

wheel will turn the front wheels.

When the steering wheel is turned

clockwise, the front wheels will turn

to the right. When the steering wheel

is turned counterclockwise, the front

wheels will turn to the left. When the

steering wheel is released, the front

wheels will remain in the selected

position.

Personal injury or death can occur if steering is lost completely during

operation.

Do not continue to operate the machine using the secondary steering.

If the secondary steering activates during operation, immediately park

the machine in a safe location. Inspect the machine and correct the

condition which made the use of the secondary steering necessary.

Secondary Steering System - This machine is equipped with a secondary steering system that

will operate in either forward or reverse direction of machine travel. If the power source for the

normal steering system fails, the warning system will alert the operator with a category 3 warning.

A category 3 warning states that the machine must be safely shut down immediately. The steering

system accumulators automatically provide a limited amount of stored hydraulic pressure for

secondary steering capability. The stored hydraulic pressure is exhausted by a small amount of

steering system oil flow that keeps the oil warm and by steering wheel action by the operator. The

stored hydraulic pressure will be exhausted faster as the steering wheel action by the operator is

used to a greater magnitude, duration, or frequency.

Secondary Brake Control Pedal (2)

Personal injury or death can result from a brake system malfunction. If

the secondary brake is required in order to stop the machine, block the

wheels securely before servicing the brake system or leaving the



machine unattended. Do not operate the machine until the entire

braking system has been checked and until all necessary repairs have

been made.

Secondary Brake Control Pedal (2)

- Use secondary brake control (2) in

order to stop the machine if service

brake control (3) does not stop the

machine properly.

Refer to Operation and Maintenance Manual, "Braking" for additional information.

Service Brake Control Pedal (3)

Service Brake Control Pedal (3) -

During normal operation, depress the

service brake control pedal in order to

stop the machine. Also, depress the

service brake control pedal in order to

slow the machine.

Refer to Operation and Maintenance Manual, "Braking" for additional information.

Note: Do not use the service brake for the purpose of maintaining the machine speed on a long

downgrade. Use the automatic retarder control in order to maintain the machine speed on a long

downgrade. On a long downgrade, the retarder controls provide the operator with the ability to

better regulate the amount of retarding force. Refer to Operation and Maintenance Manual,

"Retarding" for more information on the retarder controls.

Accelerator Pedal (4)

Accelerator Pedal (4) - The

accelerator pedal controls the fuel

flow to the engine. As the accelerator

pedal is depressed, the engine rpm

will increase.

Multifunction Switch (5)

Multifunction switch (5) controls the window wipers, the window washer, the brightness of the

headlights, and the turn signals.

Window Wipers

Window Wipers - The rotary switch

on the lever controls the window

wipers. There are six different modes

for the window wipers.

OFF Position



Intermittent Position 3 - The wipers

will operate intermittently. This is the

smallest interval of time between

cycles.


will operate intermittently.


will operate intermittently. This is the

largest interval of time between

cycles.

Continuous Position 1 - The wipers

will operate continuously at a slow

speed.

Continuous Position 2 - The wipers

will operate continuously at a high

speed.

Window Washer

Window Washer - The

button on the end of the lever

activates the window washer.

Dimmer Switch

Dimmer Switch - Toggle the

lever forward and backward

in order to adjust the

headlights between high

beam and low beam.



Directional Turn Signals

Turn Signal Left - Move the lever

downward in order to activate the left

turn signal. When the left turn signal is

activated, an indicator will illuminate

on the dash panel. The turn signal will

remain on until the lever is manually

returned to the Middle position.

Turn Signal Right - Move the lever

upward in order to activate the right

turn signal. When the right turn signal

is activated, an indicator will

illuminate on the dash panel. The turn

signal will remain on until the lever is

manually returned to the Middle

position.

Steering Wheel Tilt and Steering Column Telescope Control (6)

Tilt Control (6) - Pull the lever

upward in order to release the steering

wheel from the locked position.

Adjust the tilt position of the steering

wheel while the lever remains held

upward. Release the lever in order to

lock the steering wheel in the desired

position.

Telescope Control (6) - Push the

lever downward in order to release the

steering column from the locked

position. Adjust the telescopic

position of the steering column while

the lever remains held downward.

Release the lever in order to lock the

steering column in the desired

position.

Manual Retarder Control (Lever) (7)



Aggressive application of retarder capacity in slippery conditions may

cause loss of operator control and/or power train damage. Apply the

retarder gradually in slippery conditions. Serious injury or death may

occur if the retarder is applied too aggressively in slippery conditions.

NOTICE

Do not use the retarder control as a parking brake or to stop the

machine.

Manual Retarder Control (Lever)

(7) - The manual retarder control

(lever) is used to manually regulate

the machine speed when you travel

down a grade. Move the lever

downward in order to apply more

retarding force and slow the machine.

Move the lever upward in order to

reduce retarding force and allow the

machine speed to increase. When the

lever is in the full upward position the

manual retarder is off.

Refer to Operation and Maintenance Manual, "Retarding" for additional information.

Dash Panel Controls

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(8) Switch for headlights, parking lights, and taillights

(9) Hazard flasher switch

(10) Switch for front fog lights

(11) Heated mirror switch (if equipped)

(12) Switch for access lights

(13) Panel light switch

(14) Engine start switch



(15) Cigar lighter

(16) 12 V power receptacle

(17) Fan speed switch

(18) Temperature variable control

(19) Air conditioner switch

Switch for Headlights, Parking Lights, and Taillights (8)

Switch for Headlights,

Parking Lights, and

Taillights (8) - The switch

for the headlights, parking

lights, and taillights is a

three-position switch. Push

the top half of the switch to

the first detent in order to

activate the parking lights and

the taillights. Push the top

half of the switch to the

second detent in order to

activate the headlights, the

parking lights, and the

taillights. Push the bottom

half of the switch in order to

turn off all the headlights, the

parking lights, and the

taillights.

Hazard Flasher Switch (9)

Hazard Flashers (9) - Push

the top half of the switch in

order to turn on the hazard

flashers. Push the bottom half

of the switch in order to turn

off the hazard flashers.

Switch for Front Fog Lights (10)

Switch for Fog Lights (10) - Push the

top half of the switch in order to turn

on the fog light. Push the bottom half

of the switch in order to turn off the

fog lights. This switch only operates

the lower headlights.



Heated Mirror Switch (11) (If Equipped)

Heated Mirror Switch (11) - Push in

the top of the switch in order to apply

heat to the exterior mirrors. The

heated mirrors will be operational

when the engine start switch is in the

ON position. Push in the bottom of

the switch in order to turn off the

heated mirrors.

Switch for Access Lights (12)

Switch for Access Lights (12) - Use

this switch in order to turn on or turn

off the lighting in the area around the

stair assembly.

Note: There are two switches that activate these lights. One switch is located in the cab and the

other switch is located on the ground level controls near the bottom of the stair assembly. The

position of one switch will determine whether the other switch is in the ON position or in the OFF

position.

Panel Dimmer (13)

Panel Dimmer (13) - Depress the top

half of the switch and release the

switch in order to increase the

intensity of the panel lights. Depress

the bottom half of the switch and

release the switch in order to decrease

the intensity of the panel lights.

Engine Start Switch (14)

OFF Position

OFF position - When you insert the

engine start switch key and when you

remove 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.

Note: When the engine start switch is placed in the OFF position, and the machine is stopped, the

steering accumulators will release the hydraulic pressure from the steering system, and the brake



accumulators will release the hydraulic pressure from the braking system. If the engine shutdown

timer is used the accumulators will not release until the engine shuts down.

ON Position

ON position - To activate the

electrical circuits in the cab, turn the

engine start switch key clockwise to

the ON position.

Note: When the engine start switch is placed in the ON position, the advisor will automatically

perform an electronic power up test. An audible alarm will sound when the advisor powers up.

START Position

START position - To start

the engine, turn the engine

start switch key clockwise to

the START position. When

the engine start switch key is

released, the engine start

switch key will return to the

ON position.

Note: When the engine start switch is placed in the START position the engine prelubrication

system (if equipped) will activate.

Note: If the machine must be started immediately, the engine prelubrication system can be

overridden. Return the key to the OFF position in order to stop the prelube cycle and then turn the

key back to the START position in order to immediately start the engine. If the key is not turned

back to the START position within six seconds after the prelube cycle is terminated, the override

feature will expire. If the prelube cycle is overridden, a prelube override event will be logged in

the engine ECM.

Note: The transmission control must be in the P position in order for the engine start switch to

activate the starter.

Note: If the engine fails to start, return the engine start switch key to the OFF position. This must

be done before you attempt to start the engine again.

For more information on the Engine Start Switch, refer to Operation and Maintenance Manual,

"Engine Starting".

Cigar Lighter (12 V) (15)

Cigar Lighter (15) - Push the lighter

inward and release the lighter. When

the lighter is ready to use, the lighter

will move outward. The lighter can

also be used as a 12 V power

receptacle.



12 V Power Receptacle (16)

Power Receptacle (16) - This port

provides 12 V power.

Heating and Air Conditioning Controls

Fan Speed Switch (17)

Fan Speed Switch (17) - The fan

speed switch controls the four-speed

blower fan.

Off - Move the switch to this position

in order to turn off the blower fan.

Low - Move the switch to this

position for a low fan speed.

Medium - Move the switch to this

position for a medium fan speed.

High - Move the switch to this

position for a high fan speed.

Max - Move the switch to this

position for the maximum fan speed.

Temperature Variable Control (18)

Temperature Variable Control (18)

- Adjust the control anywhere

between MINIMUM position (left)

and MAXIMUM position (right).



This will control the amount of

heating and the amount of cooling.

Air Conditioner Switch (19)

Air Conditioner Switch (19) -

Depress the top of the switch in order

to manually turn on the air

conditioning system. Return the switch

to the middle position in order to turn

off the air conditioning system.

Automatic Temperature Control

(ATC) (19) - Depress the bottom of

switch (19) in order to turn on the

ATC. Return the switch to the middle

position in order to turn off the ATC.

In order to maintain the desired

temperature, the ATC will heat the

cab or the ATC will cool the cab.

Heating and Air Conditioning System Operation

The heating and air conditioning system can perform four functions:

Heating

Position fan switch (17) to desired speed. Adjust temperature variable control (18) for the desired

temperature.

Air Conditioning

Depress the top of switch (19) in order to manually turn on the air conditioning. Position fan

switch (17) to desired speed. Adjust temperature variable control (18) for the desired temperature.

Pressurizing

When heating or cooling is not desired, pressurize the cab in order to inhibit dust from entering.

Adjust temperature variable control (18) to a comfortable temperature. Position fan switch (17) to

a speed that is needed to keep out the dust.

Note: Opening any cab window will eliminate the controlled air pressure in the cab.

Defogging

Depress the top of switch (19). Position fan switch (17) to a speed that is needed to remove

moisture from the air in the cab. This prevents moisture from forming on the windows. Adjust

temperature variable control (18) until the moisture level is lowered.



Automatic Temperature Control (ATC)

Depress the bottom of switch (19). In order to maintain the desired temperature, the ATC will heat

the cab or the ATC will cool the cab. Adjust temperature variable control (18) to the desired set

point. When the ATC is enabled and when the variable temperature control is in the middle

position (vertical), the set point is approximately 21 C (70 F).

Note: The ATC feature does not automatically adjust the fan speed. If the machine is operating in

extreme ambient air conditions, the ATC feature will need to be run with the fan at a high fan

speed. If the cab temperature is not staying at the desired temperature, then increase the fan speed.

If the outside ambient air conditions are somewhat mild, lower fan speeds can be used to operate

the ATC feature.

Console Controls

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(20) Transmission control

(21) Hoist control

(22) Automatic retarder adjustment

(23) Automatic Retarder Control (ARC)

(24) Throttle backup and throttle lock switch

(25) Left-hand power window switch

(26) Right-hand power window switch

(27) Switch for the alternate camera (if equipped)

Transmission Control (20)

Transmission Control (20) - Use the transmission control to select FORWARD (D, 2, or 1)

speed, NEUTRAL (N) position, Parking Brake Applied (P) position, and REVERSE (R) direction.

Depress button (20C) in order to unlock the transmission control and move the transmission

control. Refer to Operation and Maintenance Manual, "Changing Direction and Speed" for more

information.

Shift Pattern

Parking Brake Applied Position -

When the transmission control is in

the P position, the parking brakes are

automatically engaged and the

transmission is not in any gear

(Neutral).

Reverse Position - When the

transmission control is in the R

position, the machine will move in

reverse.

Neutral Position - When the

transmission control is in the N

position, the transmission is not in

any gear.

Note: When the transmission control is in the N position, the parking brake is not engaged and the

wheels are able to roll freely.

Drive Position - When the

transmission control is in the D

position, the transmission will shift

between first gear and any selected

gear higher than second gear (third

gear through sixth gear).



Use button (20A) in order to raise the selected high gear limit. Sixth gear is the maximum high

gear limit.

Use button (20B) in order to lower the selected high gear limit. Third gear is the minimum high

gear limit in the D position.

Second Position - When the

transmission control is in the 2

position, the transmission will only

shift between first gear and second

gear.

First Position - When the

transmission control is in the 1

position, the transmission will remain

in first gear.

Hoist Control (21)

NOTICE

The body must be lowered and in the FLOAT position when operating

the machine. This will help prevent damage to the body, caused by

vibrations from the haul road.

LOWER Position - Hold the hoist

control lever completely forward in

order to lower the dump body. When

the lever is released, the lever will

return to the FLOAT position.

FLOAT Position - When the hoist

control lever is in the FLOAT

position, the dump body will seek a

level. The hoist control will stay in

this position until the lever is manually

moved.

HOLD Position - When the hoist

control is in the HOLD position, the

dump body will not move. The hoist

control will stay in this position until

the lever is manually moved.

RAISE Position - Hold the hoist

control lever completely backward in

order to raise the dump body and

empty the load. When the lever is

released, the lever will return to the

HOLD position .



Automatic Retarder Adjustment (22)

Automatic Retarder Adjustment

(22) - The automatic retarder

adjustment is used during the

operation of the ARC. Depress the top

of the switch or the bottom of the

switch for one second in order to

maintain a desired speed. Release the

switch after the desired speed has

been set. Momentarily press the top

half of the switch in order to increase

machine speed by one increment.

Momentarily press the bottom half of

the switch in order to decrease

machine speed by one increment. The

speed setting for the automatic

retarder is displayed on the Advisor

display.

Automatic Retarder Control (23)

Automatic Retarder Control (ARC)

(23) - Push the top half of the switch

in order to select the ON position for

the ARC system. This sustains the

machine at a constant speed on a

downgrade. If necessary, use manual

retarder control (7) in order to apply

more retarding force during the

operation of the ARC system. Push

the bottom half of the switch in order

to select the OFF position for the

ARC system.

The ARC should remain in the ON position during normal operation. For more information, refer

to Operation and Maintenance Manual, "Retarding".

Throttle Backup and Throttle Lock Switch (24) (If Equipped)

Throttle Backup and Throttle Lock

Switch (24) - This switch will perform

the function of throttle lock and the

function of throttle backup.

Throttle Backup

If there is a malfunction in the throttle position sensor on the accelerator pedal, use switch (24) to

raise the engine RPM above low idle in order to allow transportation to a service area. Place the

transmission control in the desired gear. Hold the switch in the depressed position. While the



switch is held in the depressed position, the engine low idle RPM will raise to high idle RPM.

When the switch is released, the engine RPM will return to low idle.

Throttle Lock

The throttle lock will maintain the engine speed at full throttle without depressing the accelerator

pedal.

In order to activate the throttle lock, perform the following steps:

Place the transmission control in the desired gear (the throttle lock can only be activated

between 1st gear and 3rd gear).

Place the accelerator pedal at full throttle and momentarily depress and hold switch (24) for

3 seconds.

Note: The dash indicator light for the throttle lock will illuminate when the throttle lock is

activated. Refer to Operation and Maintenance Manual, "Monitoring system" for more

information.

The throttle lock feature will automatically deactivate if any of the following conditions occur:

The application of the brakes

The transmission control is moved.

Any failure of a critical system component

When the throttle lock feature deactivates, the engine speed will be controlled by the accelerator

pedal. The indicator on the dash will turn off when the throttle lock is deactivated.

Note: The throttle lock feature is disabled as a default setting from the factory. Use the ET service

tool to adjust the parameters of the throttle lock in order to program the gear range and allow

activation of the throttle lock feature.

Power Window Switch (Left Side) (25)

Power Window Switch (Left Side)


in order to close the window on the

left side of the cab. Push the bottom

half of the switch in order to open the

window.

Power Window Switch (Right Side) (26) (If Equipped)

Power Window Switch (Right Side)


in order to close the window on the

right side of the cab. Push the bottom

half of the switch in order to open the

window.



Switch for the Alternate Camera (27) (If Equipped)

Switch for the Alternate Camera

(27) - Depress top of the switch in

order to view the right side camera on

the WAVS monitor and turn on the

appropriate lighting for the right side

camera. For more information on the

Work Area Vision System, refer to

Operation and Maintenance Manual,

"Camera".

Overhead Controls

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(28) Test switch for the traction control system

(29) Parking brake release switch

(30) Idle shutdown timer switch (if equipped)

Test Switch for the Traction Control System (28)

Test Switch for the Traction

Control System (28) - Push the top

half of the switch in order to test the

Traction Control System (TCS). Hold

the switch in place during the test.

Release the switch in order to end the

test of the Traction Control System

(TCS).



Parking Brake Release Switch (29)

Parking Brake Release Switch (29) -

Lift the latch on the bottom half of the

brake release switch in order to unlock

the switch. Push the top half of the

switch in order to operate the electric

motor for the parking brake release

pump. Push the bottom half of the

switch in order to deactivate the

electric motor for the parking brake

release pump.

Note: Only use the brake release switch in order to release the brakes if this machine is being

towed as a disabled machine. Do NOT keep the brake release control in the ON position longer

than 20 seconds. For more information, refer to Operation and Maintenance Manual, "Towing

With Inoperable Engine".

Idle Shutdown Timer Switch (30) (If Equipped)

Idle Shutdown Timer Switch (30) -

In order to set the idle shutdown

timer, push the top half of the switch,

and then turn the engine start switch

to the OFF position. The engine

shutdown timer can be programmed

through ET to shut down the engine

after a specific time period of idling.

The idle time can be programmed.

The following conditions must be met

in order to activate the idle shutdown

timer:

The idle shutdown feature must be selected.

The transmission control is in the P position.

The retarder control is off.

The throttle pedal is released.

The brake pedals are released.

No machine speed is detected by the Electronic Control Module (ECM).

The engine is not under load.

The engine is at operating temperature.

Do not leave the machine unattended until the engine has completely shut down.

Note: In order to deactivate the idle shutdown timer, push the bottom half of the switch. If the

engine start switch remains in the OFF position the engine will stop when the idle shutdown timer



is deactivated. In order to allow the engine to continue to run, turn the engine start switch to the

ON position before deactivating the idle shutdown timer.

Service Ports

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(31) ET service port

(32) 12 V power receptacle

(33) VIMS 3G service port

ET Service Port (31)

ET Service Port (31) - This service

port allows service personnel to

connect a laptop computer that is

equipped with the Electronic

Technician (ET). This will allow

service personnel to diagnose the

machine systems and this will allow

service personnel to program system

parameters.

12 V Power Receptacle (32)

Power Receptacle (32) - This port

provides 12 V power.



VIMS 3G Service Port (33)

VIMS 3G Service Port (33) - This

service port allows service personnel

to connect a laptop computer with the

software for VIMS.

Ground Level Controls

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The ground level control box is shown with the cover open.

The ground level control box is located on the right side of the front bumper near the base of the stairs.

(34) Battery disconnect switch

(35) VIMS service port

(36) Machine lockout control

(37) Switch for Engine Service Lights

(38) Switch for access lights

(39) Engine shutdown switch

(40) Engine lockout control

(41) DEF purging lamp

Battery Disconnect Switch (34)

Battery Disconnect Switch (34) - See


"Battery Disconnect Switch".



VIMS Service Port (35)

VIMS Service Port (35) - This

service port allows service personnel

to connect a laptop computer with the

software for VIMS 3G.

Note: The engine lockout control will allow power to the ECM in order to provide an active

VIMS service port.

Machine Lockout Control (36)

Machine Lockout Control (36) - See


"Machine Lockout Control".

Engine Service Lights (37)

Engine Service Lights (37) -

Move this switch to the ON

position in order to light the

engine area.

Switch for Access Lights (38)

Switch for Access Lights (38) - Use

this switch in order to turn on or turn

off the lighting in the area around the

stair assembly.



Note: There are two switches that activate these lights. One switch is located in the cab and the

other switch is located on the ground level controls near the bottom of the stair assembly. The

position of one switch will determine whether the other switch is in the ON position or in the OFF

position.

Engine Shutdown Switch (39)

Engine Shutdown Switch (39) - See


"Engine Shutdown Switch".

Engine Lockout Control (40)

Engine Lockout Control (40) - See


"Engine Lockout Control".

DEF Purging Lamp (41)

NOTICE

Do not turn off the battery disconnect switch until the indicator lamp

has turned off. If the switch is turned off when the indicator lamp is

illuminated the Diesel Exhaust Fluid (DEF) system will not purge the

DEF. If the DEF does not purge, DEF could freeze and damage the

pump and lines.

NOTICE

Never move the battery disconnect switch to the OFF position while the

engine is operating. Serious damage to the electrical system could

result.

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Wait to Disconnect Lamp (41) - Do not turn off the battery power disconnect switch until light

has been turned off. If the switch is turned off when the light is illuminated, then the DEF system

will not purge and DEF could freeze and damage the pump and lines.

Copyright 1993 - 2015 Caterpillar Inc.Todos los derechos reservados.Red privada para licenciados del SIS.

Thu Sep 10 2015 15:42:44 GMT-0500 (Hora est. Pacfico, Sudamrica)



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793F