Fault Phenomenon: Volvo G960 grader cab vibration is severe, one side of the body sinks.

Troubleshooting Process:
– Checked air bag: rubber air bag surface cracked and leaking.
– Checked air lines: supply lines normal.
– Checked height control valve: functioning normally.
– Checked load: not overloaded.

Root Cause: The air spring (air bag) in the cab suspension system ruptured due to aging or corrosion, unable to maintain air pressure.

Required Parts: Cab suspension air bag assembly.