Humbaur 10000 Series, Operating Instructions Manual

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224 Troubleshooting
Axles / air spring system
8
Fault Possible causes Remedy
The trailer squeaks while driving /
worn bearings. - Bearing setting too lose or too firm.
- Foreign body in axle bearing. Faults must be repaired by a specialist
workshop.
- Inadequate lubrication of the axles. Lubricate the axles in accordance with the
axle manufacturer's instructions.
- Overloading the axles. Adhere to the axle loads specified for your
trailer.
Missing wheel bolts. - Wheel nuts fastened with wrong torque.
- Wheel nuts not properly tightened. Replace the wheel bolts, wheel nuts and
the rim, if required.
Tighten the wheel nuts, using the torque
specified by the axle manufacturer.
Faults must be repaired by a specialist
workshop.
Fault Possible causes Remedy
The trailer does not lie horizontally after
coupling. - Air-suspension (lifting / lowering system)
has been lifted / lowered. Ensure that the air-suspension system is
in the normal position.
- The spindle support has not been raised. Raise the spindle support.