Wheel Bolt/Nut Inspection And Torquing Procedure - Skyjack SJ-7027 Operating, Maintenance And Parts Manual

WHEEL BOLT/NUT INSPECTION AND TORQUING PROCEDURE

It is necessary to check the torque on all wheel nuts and wheel bolts at pre-delivery, after 8 hours of operation and
at weekly intervals using the following procedure:
1. Confirm that each wheel fastener is torqued to 140 ft. lbs. (± 5 ft. lbs.) using a suitable torque wrench of
known accuracy. If any fastener falls outside of the specified tolerance, ALL fasteners MUST be torqued
using the tightening sequence shown in Figure 5-5.
2. Again, confirm that each wheel fastener is torqued to the specified tolerance. Retorque as necessary until
ALL fasteners are properly torqued.
WHEEL REINSTALLATION AND TORQUING PROCEDURE
When a Wheel/Tire Assembly has been removed or replaced, it will be necessary to follow the procedure below to
ensure proper installation:
1. Inspect wheel fastener threads for damage of defects. Replace if defective.
2. Clean the mounting surfaces of the hub and wheel rim of debris, rust, excess paint, etc.
3. Mount wheel on the hub, centering mounting holes on the wheel studs or bolt holes. Use appropriate lifting
device as required.
4. Install the wheel nuts or wheel bolts and hand tighten to center the rim.
5. Tighten the nuts or bolts to approximately 50 ft. lbs. torque using the tightening sequence in Figure 5-5.
above.
6. Tighten to 100 ft. lbs. using the same sequence.
7. Tighten to 140 ft. lbs. using the same sequence.
8. Repeat the tightening sequence to confirm that none have changed from 140 ft. lbs. If any are found below
140 ft. lbs., repeat complete sequence until there is no change in torque values. If possible, drive the
machine prior to checking torques.
9. Check torque values after 8 hours of operation and then at weekly intervals.
SECTION 5, Page 10
Figure 5-5. Wheel Fastener Tightening Sequence
June 2001
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