250100112 steering control unit for XCMG ZL50G/ZL50GL Wheel Loader

product parameters

Part Number：250100112
Product Name：Steering Gear
Applicable Model：XCMG ZL50G, ZL50GL Wheel Loader
Material：High-strength cast aluminum alloy valve body, alloy steel rotor and matching pair
Sealing Parts：Nitrile rubber sealing assembly
Rated Working Pressure：System steering pressure
Control Mode：Full hydraulic follow-up control, manual emergency steering backup
Working Medium：L-HM46 anti-wear hydraulic oil
Working Temperature：-20℃ ~ 80℃
Connection Form：Threaded oil port, spline connection, flange bolt fixing
Inspection Items：Dimensional inspection, metering accuracy test, pressure holding leakage test, steering response test, noise detection

Applicable Scenarios

It is used for full-hydraulic steering control of 5-ton wheel loader, matched with steering pump and steering cylinder, suitable for earthwork, quarry, sand yard, port loading and unloading and other working conditions requiring frequent steering.

• Produced strictly according to OEM standards, installation hole, spline and oil port size match the original part, direct replacement without modification.
• Integrated metering motor design, accurate flow metering, proportional steering, smooth and easy steering operation.
• Built-in overload pressure relief protection valve, effectively prevent system overpressure damage caused by impact load.
• Dual safety design with emergency manual steering function, improving the safety of sudden hydraulic power loss.
• Compact aluminum alloy valve body, light weight, good vibration resistance, not easy to deform under long-term vibration.
• Reasonable internal flow channel layout, small pressure loss, stable steering response.

FAQ 

Q: Can this steering gear be disassembled and adjusted internally at will?
A: It is not recommended. The internal matching clearance and valve group pressure are calibrated in factory. Random disassembly and adjustment will lead to inaccurate steering ratio, jamming or steering failure.

Q: What are the common reasons for heavy steering?
A: Insufficient oil supply from steering pump, blocked steering filter, internal wear of steering gear, oil viscosity too high and air mixed in the circuit will cause heavy steering.

Q: What should be checked before installing the steering gear?
A: Check the valve body for collision and crack damage, confirm that splines and threads are intact, clean the pipeline to avoid impurities entering the valve cavity.

Q: What will happen if there is air in the steering circuit?
A: Steering will jitter, wander and lag, the steering feel becomes unstable, and the steering accuracy decreases. It needs to exhaust the air of the steering circuit in time.

Q: What effect will hydraulic oil pollution have on the steering gear?
A: Hard particles in the oil will scratch the rotor and valve sleeve matching surface, accelerate wear, cause internal leakage and gradually worsen steering performance.

Q: What is the function of the built-in overload valve of the steering gear?
A: It limits the maximum pressure of the steering circuit. When the steering cylinder hits the limit position, it opens for pressure relief to protect the steering gear and related pipelines from overpressure damage.