Group 92
Service Procedures
Service Procedures
9222-06-03-01
Fifth Wheel, Checking
See also “Fifth Wheel” page 3.
General Inspection
Note: To achieve maximum life and safety, fifth wheels
must be regularly inspected and properly serviced.
Recommended service interval is every 3 months or
48,000 km (30,000 miles).
For safe and efficient operation, the following should be
inspected:
1
Check for any cracked, broken or missing parts. Replace
as necessary.
2
Ensure cotter pins are adequately spread for proper lock.
Clinch pins and cotter pins should be installed with the
short leg in the upward direction.
3
All mounting bolts should be torqued for 5/8 to 270 ± 25
Nm (200 ± 20 ft-lb) and M16 to 320 ± 50 Nm
(236 ± 37 ft-lb).
270 ± 25 Nm
(200 ± 20 ft-lb)
, 320 ± 50 Nm
(236 ± 37 ft-lb)
4
WARNING
Eye injury hazard. Wear eye protection when welding
or grinding any part of the truck, trailer, or fifth wheel.
Failure to use eye protection could result in severe eye
injury and blindness.
CAUTION
Only use a certified welder to weld any part of the
fifth wheel.
Check for sharp edges on the top plate. Grind off any
sharp edges to a
3 to 6 mm (1/8 to 1/4 in.) radius as required.
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