D
Group 177 Preventive Maintenance
98
Check Rear Suspension Level Sensors
and Leveling Valves
To perform a check of the air bellow, level sensors and
level valves for the air suspension, complete the following:
1 Check the air spring for wear and cracks.
2 Check the level valve for proper operation.
3 Check the leveling valve for wear and damage.
4 Check rod control linkage.
99
Check Height Regulation for Air
Suspension
Not applicable for VN/VHD and VT vehicles.
W0001880
100
Check Chassis Frame and Crossmembers
To perform a check of the chassis frame and
crossmembers, complete the following:
1 Check the chassis frame for excessive wear or
damage.
2 Check the securing fastners for looseness, excessive
wear or damage.
3 Check the crossmembers for excessive wear or
damage.
96
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