Fault Phenomenon: SANY SW956 wheel loader steering wheel vibrates, accompanied by “squeaking” sound, steering action jerky.

Troubleshooting Process:
– Checked fluid level: steering tank oil level too low.
– Checked suction line: steering pump suction line fitting loose, leaking air.
– Checked cylinder: steering cylinder seal not tight, drawing air.
– Checked fluid: hydraulic oil emulsified.

Root Cause: The steering pump suction line fitting is loose, allowing a large amount of air to enter the hydraulic system, causing cavitation and vibration.

Required Parts: Tighten suction line fitting, replace hydraulic oil and bleed air from system.