Stuck Machine; Rocking Out - Bell B40C 6X6 Operator's Manual

Articulated dump truck
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‹ WARNING
Do not operate the bin tip lever unless the trans-
mission is in Neutral (or dumping in 1st or
Reverse). This practice can over-ride the safety
functions and could cause damage to the ma-
chine and/or personal injury.

Stuck Machine

Note: If the ground is soft with deep wheel tracks
constant attention must be given to the rear chassis
angle.
If the rear chassis starts to lean sideways exces-
sively, stop the machine immediately and try another
route.
If the machine becomes stuck the following must be
done:
Select Neutral (N).
Engage the inter-axle differential lock.
Select Drive (D).
Check that the inter-axle differential lock indica-
tor illuminates.
Drive off slowly keeping the engine speed
(rev/min) constant and not too high.
To assist with traction, turn the steering wheel
one way and then the other alternately causing
the machine to adopt a "duck waddle.
Continue with this movement until the machine
is free and can be operated normally.
Note: If the machine does not move, get a towing ve-
hicle to move the machine from the soft soil.

Rocking Out

‹ WARNING
To help in avoiding injury or property damage
caused by sudden movement of the machine, do
not make shifts from N to D or R when the throttle
is open.
If the operator shifts while the throttle is open too
much, the transmission will engage only if the throttle
is closed in the next three seconds. That can cause a
sudden movement of the machine. Leaving the
throttle open longer than three seconds causes the
transmission to remain in N. Avoid this condition by
making shifts from N to D or R only when the throttle
is closed.
870984-01
June 1, 1999
‹ CAUTION
Do not make N to D or directional shift changes
when the engine speed is above idle. Also if the
wheels are stuck and not turning, do not apply
full power for more than 30 seconds in either D or
R.
Full power for more than 30 seconds under the
above conditions will cause the transmission to over-
heat.
If the transmission overheats, shift to N and operate
the engine at 1 500 rev/min until it cools (2-3 min-
utes).
If the machine is stuck in deep sand, snow or mud, it
may be possible to rock it out as follows:
Shift to D and apply steady, light throttle (never
full throttle).
When the vehicle has rocked forward as far as it
will go, apply the service brakes.
Allow the engine to return to idle.
Select R.
Release the service brakes and apply a steady,
light throttle and allow the machine to rock in R
as far as it will go.
Again apply and hold the service brake and al-
low the engine to return to idle.
This procedure may be repeated in D and R if
each directional shift continues to move the ma-
chine progressively further.
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