Komatsu 830E Shop Manual page 696

OVERRIDE SWITCH
The override switch
(9) is spring loaded
to the OFF position.
When pushed in and
held, the switch may
be used for several
functions.
• The override switch may be used to move the
truck forward when the selector switch is in
FORWARD, the dump body is raised, and the
brakes are released.
Use of the override switch is intended for emer-
gency situations only.
• If the operator stops the truck on an uphill incline,
the override switch can be used to set up forward
propulsion while the brakes are applied. As soon
as forward propulsion is felt, completely release
the brakes and a few seconds later release the
override switch.
• The push button deactivates the retard pedal
function when truck speed is below 3 MPH (4.8
km/h).
• The override switch is also used to reset the
electric system fault when indicated by the red
warning light. (Refer to "Indicator Lights")
RETARD SPEED CONTROL (RSC) SWITCH
The Retard Speed Control Switch (11) turns the sys-
tem "On" or "Off".
N5-8
Push the Retard Speed
Control Switch knob "IN" to
turn "OFF".
Pul the Retard Speed Control
knob "OUT" to turn the system
"ON".
Then the system is ON, an amber
indicator light on the overhead panel is illuminated.
(Refer to "Indicators Lights" for location.
RSC ADJUST DIAL
The RSC Adjust Dial (12, Figure 5-5) allows the
operator to vary the downhill truck speed that the
Retard Speed Control system will maintain when
descending a grade.
Operation
When the dial is rotated counter-
clockwise, the truck will descend at a
lower speed.
When the dial is rotated clockwise,
the truck speed will increase.
The position of the throttle pedal will override the
RSC setting. If the operator depresses the throttle
pedal to increase truck speed, dynamic retarding will
not activate unless the truck overpseed setting is
reached or the foot applied retard pedal is
depressed.
Operator Controls
"IN"
"OFF"
"OUT"
"OUT
N05056