Operation and maintenance manual

Section 230-0081
SM 1411 Rev 2 04-02
1
BODY SYSTEM - Body Control Joystick
Fig. 1 - Body Control Joystick Installation
1 - Body Control
Joystick
SM - 2718DESCRIPTION
The body control joystick is mounted on the right hand
side dash panel, between the transmission shift
controller and the document location.
OPERATION
The body control joystick controls the hydraulic control
valve operation, by means of electrical signals to the
pressure reducing valves, which in turn operates the
body hoist cylinders. The four operating positions of
the joystick from front to rear are as follows:
'FLOAT' - The joystick should be moved to this
position while the body is lowering by gravity and
should remain in this position until the body must be
operated again. The control joystick should always be
kept in 'FLOAT' while the machine is in motion.
'LOWER' - Pushing the joystick forward and holding it
in this position provides hydraulic force to power-down
the body. It is needed when the body cannot be
started downward from the fully raised position by
gravity. When the body starts lowering by gravity, the
joystick can be released and internal valve springs will
move the joystick to the 'HOLD' position.
'HOLD' - Moving the joystick to this position while the
body is being raised or lowered traps the oil in the
body hoists to stop and hold the body at any desired
height. The joystick will remain in the 'HOLD' position
when released.
'RAISE' - Pushing the joystick back and holding it in
this position directs oil to extend the body hoists and
raise the body. When released, the joystick will be
spring-returned to the 'HOLD' position.
Note: The body control lever must remain in the
'FLOAT' position until it is necessary to operate the
body again. Failure to comply to this could result in
overheating the hydraulic oil and failure of the
hydraulic system components.
Note: A proximity sensor prevents the body being fully
powered down onto the chassis. At a predetermined
height, the sensor automatically defaults the body
control valve to the detented 'FLOAT' condition.
Note: If an electrical failure occurs, 12V relay (K37 -
engine signal) ensures the body control valve
automatically defaults to the 'HOLD' condition. The
cause of the electrical fault must be investigated and
corrected. Refer to Section 190-0000, CIRCUIT
DIAGRAMS.
WARNING
Always disconnect body control joystick before
welding on the machine.
MAINTENANCE
Numbers in parentheses refer to Fig. 1.
The body control joystick is a non-serviceable item and
should be replaced completely, if damaged, as follows:
Note: Tighten all fasteners to standard torques listed in
Section 300-0080, STANDARD BOLT AND NUT
TORQUE SPECIFICATIONS.
WARNINGS
To prevent personal injury and property
damage, be sure wheel blocks are properly
secured and of adequate capacity to do the job
safely.
1. Position the vehicle in a level work area, ensure the
body is fully lowered, apply the parking brake and
switch off the engine. Operate the steering right and
left several times to relieve pressure in the steering
system.
2. Block all road wheels, place the steering lock bar in
the 'Locked' position and the battery master switch in
2 - Screw
3 - Harness
2
1
3