Fault Phenomenon: Lonking 850 wheel loader after closing the exhaust brake, the engine still feels braking resistance, acceleration weak.

Troubleshooting Process:
– Checked valve plate: exhaust brake valve plate stuck in closed position.
– Checked cylinder: drive cylinder piston stuck or leaking.
– Checked solenoid valve: control solenoid valve faulty.
– Checked linkage: mechanical linkage deformed and seized.

Root Cause: The exhaust brake valve plate is stuck in the closed position due to carbon buildup or a rusted shaft, unable to open with the control signal, obstructing exhaust.

Required Parts: Clean or replace exhaust brake valve assembly.