PUTTING THE VEHICLE IN MOTION PART 7: STARTING & OPERATING THE VEHICLE
– 102 – Y53-6032 (05/10)
Switch In Unlock Position
WARNING! Do not engage the differential lock
while operating on dry pavement; it could
lead to an accident involving death or per-
sonal injury. You will not be able to safely
steer the vehicle while using the differential
lock and driving on dry pavement. Only
engage the switch for short periods of time to
move the vehicle in a straight motion.
To lock the differential, ease up on the throttle. Be sure to
stop any spinning wheels. Then push the switch to the
LOCK position. It may be neccessary to use light throttle
to help engage the differential lock.
In the LOCK position, continuous operation on a paved,
dry surface stresses the tandem axles, possibly causing
internal damage to them.
• Shift into the LOCK position to operate on slippery
surfaces like
– Ice or snow - with or without tire chains
– Dirt roads
– Loose sand, mud, or other off-road conditions
• Switch into LOCK when checking performance on a
chassis dynamometer.
WARNING! Do not engage the differential lock
if the vehicle is moving or if the tires are slip-
ping. Otherwise, the vehicle may move in an
unexpected direction, and could cause an
accident involving death or personal injury.
This may also lead to equipment damage.
Bring the vehicle to a complete stop and
ensure that all wheels are not spinning before
engaging the differential lock switch.
SHIFT AT ANY SPEED EXCEPT
IF A WHEEL IS SPINNING
03029
Y53-6032.book Page 102 Monday, May 24, 2010 3:37 PM
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