3-12.2 Inspect condition of fuel tanks, fuel lines, clips and routing.
3-13 SUPPORTING VEHICLE FOR SERVICE 3-13.1 Set parking brake and/or block wheels to prevent vehicle from
moving.
3-13.2 Select jack (floor jack preferred) with a rated capacity sufficient to lift and hold up the vehicle.
3-13.3 Raise vehicle with jack applied to axle(s). (DO NOT use bumper as a lifting point.) 3-13.4 Support vehicle with
floor stands under axle(s). If axle or suspension components are to be serviced, support vehicle with floor stands under
frame sidemembers, preferably between the axles.
WARNING
A jack should never be used alone to support vehicle while under-chassis service is being performed. The
jack may lower and serious personal injury could result. Always support vehicle with floor stands.
3-14 PROPELLER SHAFT 3-14.1 At the regular lubrication interval, check universal joints for wear.
3-14.2 Caution should propeller shaft vibrations occur, stop the vehicle immediately to avoid possible hazardous
consequences or damage to other components.
3-15 SPRINGS 3-15.1 Periodically check condition of spring leaves for evidence of fatigue, bending, or breakage.
3-15.2 Check condition of suspension mounting brackets or bushings.
3-15.3 Suspension alignment must be maintained at all times.
3-15.4 Check U-Bolts as follows:
a.
After the chassis has been operating under load for 1000 miles (1 600 km) or six months, whichever comes first,
the U-Bolt nuts must be retorqued.
b.
The U-Bolt nuts thereafter must then be retorqued every 36,000 miles (57 936 km).
c.
The U-Bolt (joint) should be cleaned and lubricated to assure a "like new" condition.
3-11
