Override/Fault Reset Switch; Engine Shutdown Switch; Window Control Switches; Hoist Control Lever - Komatsu 930E-4SE Operation & Maintenance Manual

Dump truck
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OM3245 8/11

Override/Fault Reset Switch

This push-button switch (3, Figure 32-3) is spring-
loaded to the OFF position. When pushed in and
held, this switch may be used for several functions.
• The switch permits the operator to override the
body-up limit switch and move the truck forward
when
the
directional
FORWARD, the dump body is raised, and the
brakes are released. Use of the override switch
for this purpose is intended for emergency
situations only!
• The push-button deactivates the retard pedal
function when the truck speed is below 5 kph (3
mph).
• The switch is also used to reset an electric
system fault that is indicated by a red warning
light.
Refer
to
Overhead
Indicators later in this section.

Engine Shutdown Switch

Engine shutdown switch (4, Figure 32-3)
is used for engine shutdown. Pull the
switch up to stop the engine. Push the
switch back down to enable engine
operation.
SWITCH UP
ENGINE OFF
Use this switch to shutdown the engine if the key
switch fails or to stop the engine without turning off
the 24 VDC electrical circuits.
A ground level engine shutdown switch is also
located at the left front corner of the truck.

Window Control Switches

Control switches (5 and 6, Figure 32-3) are spring-
loaded to the OFF position. Pushing the front of the
switch raises the left hand or right hand cab window.
Pushing the rear of the switch lowers the window.
control
lever
is
in
Status/Warning
SWITCH DOWN
ENGINE ON
Operator Cab And Controls - Section 32

Hoist Control Lever

Hoist control (7, Figure 32-3) is a four position hand-
operated lever located between the operator seat
and the center console (see illustration below).
Raising The Dump Body
1. Pull the lever to the rear to actuate the hoist
circuit. Releasing the lever anywhere during
"hoist up" will place the body in HOLD at that
position.
2. Raise engine rpm to increase hoist speed.
3. Reduce the engine speed as the last stage of
the hoist cylinders begin to extend, then let the
engine go to low idle as the last stage reaches
half-extension.
4. Release the hoist lever as the last stage
reaches full extension.
5. After the material being dumped clears the
body, lower the body to the frame.
Refer to Section 30, Operating Instructions -
Dumping, for more complete details about this
control.
Lowering The Dump Body
Move the hoist lever forward to the DOWN
position and release. Releasing the lever places
hoist control valve in the FLOAT position,
allowing the body to return to the frame.
Page 32-7

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