Fault Phenomenon: LiuGong 835 wheel loader (equipped with central tire inflation system) instrument displays low pressure for one tire, but actual pressure is normal.

Troubleshooting Process:
– Checked rotary union: rotary seal at the wheel hub leaking or stuck.
– Checked air lines: air line worn or kinked.
– Checked sensor: pressure sensor failed.
– Checked air bag: inner tire air bag ruptured.

Root Cause: The rotary seal at the wheel hub is stuck or worn due to mud ingress, causing the inflation system to be unable to maintain pressure.

Required Parts: Replace wheel hub rotary seal.