252900951 brake governor for XCMG ZL50G/ZL50GL Wheel Loader

252900951 brake governor for XCMG ZL50G/ZL50GL Wheel Loader Featured Image
  • 252900951 brake governor for XCMG ZL50G/ZL50GL Wheel Loader

Short Description:

Hand Brake Control Valve Assembly, Part No.252900951, fits XCMG ZL50G, ZL50GL wheel loader. It is the main control valve for parking brake pneumatic circuit.

Product Detail

Product Tags

description

This 252900951 hand brake control valve assembly is matched for parking brake system of XCMG ZL50G and ZL50GL wheel loader. The valve body is die-cast from high-strength aluminum alloy, built with spool, return spring, seal kit, air inlet, outlet and exhaust port with control handle. The operator switches air circuit by pulling the handle. At lock position, air outlet is cut off and pipeline air is exhausted to activate parking brake. At release position, compressed air is delivered to release parking brake. Port specification, mounting hole spacing and handle stroke follow OEM drawings for direct replacement of old faulty valves, compatible with original air pipes and brackets without pipeline reworking. Every valve passes air tightness and cycle fatigue test. It features reliable sealing and sensitive response, adapting to dusty, bumpy and wide temperature fluctuation working conditions, preventing safety risks caused by parking brake malfunction.

product parameters

Product Name: Hand Brake Control Valve Assembly
Part No.: 252900951
Applicable Model: XCMG ZL50G, ZL50GL Wheel Loader
Function: On-off control of parking brake air circuit
Valve Body Material: Die-cast aluminum alloy
Internal Structure: Spool, return spring, rubber seals
Port Type: Threaded air ports
Installation: Matches original brake air hoses, pipe clamps, support brackets and sealing washers
Working Condition: Quarry mining, aggregate yard, heavy earthwork and construction projects

Applicable Scenarios

It is installed inside the cab of XCMG ZL50G and ZL50GL wheel loader, connected between air tank and parking brake actuator, widely used in quarry, aggregate yard and earthwork construction sites.

advantage

▪ OEM port layout, hole spacing and handle stroke match original parts for direct installation
▪ Lightweight aluminum alloy valve body resists corrosion and avoids rust and jamming
▪ Precisely fitted spool with oil-resistant seals provides stable pressure holding performance
▪ Built-in high-performance return spring delivers clear gear position and smooth operation
▪ Well arranged ports separate air inlet, outlet and exhaust for fast pressure switching
▪ Dust-proof structure reduces contaminant ingress and spool wear
▪ Compatible with booster pump, air reservoir, air pipes and brackets for convenient stock management
▪ Cycle air tightness inspection screens defective valves to ensure reliable parking brake control

FAQ 

Q：Can the valve with continuous air leakage keep working?
A：It is not allowed. Internal seal failure causes pressure loss and unexpected parking brake lock or release, replace immediately.

Q：What causes stiff handle and unclear gear position?
A：Dust contamination, seal aging or spool corrosion. Replacement of whole assembly is recommended.

Q：Is slow parking brake release caused by this valve?
A：Check air tank pressure and pipe leakage first. Replace valve if air supply is normal.

Q：Can I only replace internal seal kit?
A：Seal kit is only for emergency use. Worn valve body leads to recurring failure under heavy vibration.

Q：How to store spare hand brake valve?
A：Store in dry dark place, seal all ports against dust and avoid heavy pressure on handle.

Q：What is the hazard of ineffective parking brake?
A：Machine rolling on slope, which may lead to collision accident. Stop operation immediately.

Q：How to test after installation?
A：Fill air to rated pressure, operate handle repeatedly, check pressure gauge for normal lock and release.

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