Fault Phenomenon: BelAZ 75710 giant mining truck after the engine stalls, the number of emergency steering operations is insufficient or there is no power steering assist.

Troubleshooting Process:
– Checked accumulator: insufficient nitrogen pre-charge pressure or bladder ruptured.
– Checked check valve: check valve before accumulator internal leakage.
– Checked pump: steering pump output pressure low.
– Checked leakage: external or internal leakage in steering system.

Root Cause: The emergency steering accumulator nitrogen leaked, resulting in insufficient stored hydraulic energy to provide adequate steering operations after engine stall.

Required Parts: Replace accumulator bladder and recharge with nitrogen, or replace accumulator assembly.