Table of Contents
Advertisement
OVERRIDE /FAULT RESET SWITCH
T h i s p u s h - b u t t on
switch (9, Figure 5-4)
is spring-loaded to the
"OFF" position.
When pushed in and
held, this switch may be used for several functions.
1. This switch permits the operator to override the
"body-up" limit switch and 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 for this purpose is
intended for emergency situations only!
2. The push button deactivates the retard pedal
function when speed of truck is below 3 mph (4.8
kph).
3. The override switch is also used to reset an
electric system fault when indicated by a red
warning light (Refer to "Instrument Panel And
Indicator Lights", Overhead Warning / Status
panel).
10, FIGURE 5-4 - BLANK
This position is not used for the
930E.
In some other truck models, this
position is used for an Engine Idle
Switch.
RETARD SPEED CONTROL (RSC)
"OFF/ON" SWITCH
The Retard Speed Control Switch
(11, Figure 5-4) turns the system
"OFF" or "ON". Push the knob
"IN" to turn "OFF" and pull the
knob "OUT" to turn the system
"ON".
N05044
RETARD SPEED CONTROL (RSC) ADJUST DIAL
The RSC Adjust Dial (12, Figure 5-4) allows the opera-
tor to vary the downhill truck speed that the Retard
Speed Control system will maintain when descending
a grade. This function can be overridden by either the
accelerator, retard lever, or retard pedal.
When the dial is rotated counterclockwise
toward this symbol, the truck will descend
a grade at lower speeds.
When the dial is rotated clockwise toward
this symbol, the truck speed will increase.
ALWAYS refer to the Grade/Speed decal in the
operator's cab, and follow the recommendations for
truck operation. DO NOT exceed these recommended
MAXIMUM speeds when descending grades with a
loaded truck.
Throttle pedal position will override RSC setting. If
operator depresses throttle pedal to increase truck
speed, Dynamic Retarding will not come on unless
truck overspeed setting is reached or foot operated
retard pedal is used. When throttle pedal is released
and RSC switch is "On", Dynamic Retarding will come
on at, or above, the RSC dialed speed and will adjust
truck speed to, and maintain, the dialed speed.
To adjust RSC control, pull switch (11) "On" and start
with dial (12) rotated toward fastest speed while driving
truck at desired maximum speed. Relax throttle pedal
to let truck coast and turn RSC Adjusting Dial slowly
counterclockwise until Dynamic Retarding is activated.
Dynamic Retarding will now be activated automatically
anytime the "set" speed is reached, the RSC switch is
"On", and throttle pedal is released.
With RSC switch "On" and dial adjusted, the system
will function as follows: As truck speed increases to the
"set" speed and throttle pedal released, Dynamic Re-
tarding will apply. As truck speed tries to increase, the
amount of retarding effort will automatically adjust to
keep the selected speed. When truck speed de-
"IN"
"OFF"
creases, the retarding effort is reduced to maintain the
selected speed. If truck speed continues to decrease
to approximately 3 mph (4.8 kph) below "set" speed,
Dynamic Retarding will turn off automatically. If truck
speed must be reduced further, the operator can turn
"OUT"
"ON"
the Adjust Dial to a new setting or depress the foot
operated retard pedal.
If the operator depresses the foot operated retard
pedal and the retard effort called for is greater than that
from the automatic system, the foot pedal retard will
override RSC.
Operator Cab Controls
N5-9
Advertisement
Table of Contents
Troubleshooting
