26
Caution
If you leave the key in the ignition switch, someone could accidently start the engine and
seriously injure you or other bystanders.
Remove the key from the ignition and disconnect the wire(s) from the spark plug(s) before you
do any maintenance. Set the wire(s) aside so that it does not accidentally contact the spark
plug(s).
The bed must be raised to perform some routine
maintenance. The bed could fall and injure
persons that are underneath it.
• Always use prop rod to hold bed up before
working under raised bed.
• Remove any load material from bed before
working under raised bed.
Warning
Heavy Duty Operation
Important If the vehicle is subjected to any of the
conditions listed below, maintenance should be performed
twice as frequently:
• Desert operation
• Cold climate operation (below 32 degrees F)
• Trailer towing
• Frequent operation on dusty roads
• Construction work
• After extended operation in mud, sand, water, or similar
dirty conditions, have your brakes inspected and
cleaned as soon as possible. This will prevent any
abrasive material from causing excessive wear.
• Under frequent heavy duty operating conditions,
lubricate all grease fittings and inspect the air cleaner
daily to prevent excessive wear.
Jacking the Vehicle
Whenever the engine is run for routine maintenance and/or
engine diagnostics, the rear wheels of the vehicle should be
1 in. (25 mm) off of the ground with the rear axle supported
on jack stands.
Danger
A vehicle on a jack may be unstable and slip off of
the jack, injuring anyone beneath it.
• Do not start the engine while the vehicle is on a
jack.
• Always remove the key from the ignition before
getting off of the vehicle.
• Block the tires when the vehicle is on a jack.
The jacking point at the front of the vehicle is on the front
of the frame behind the towing tongue (Fig. 23) The
jacking point at the rear of the vehicle is under the axle
tubes (Fig. 24).
1
Figure 23
1. Front jacking point
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