251800678 brake cylinder for XCMG ZL50G/ZL50GL Wheel Loader

product parameters

Product Name: Brake Cylinder Assembly
Part No.: 251800678
Applicable Model: XCMG ZL50G, ZL50GL Wheel Loader
Function: Pneumatic drive for parking brake mechanism
Cylinder Material: Seamless steel tube
Seal Material: Oil-resistant rubber composite
Components: Cylinder barrel, piston, seal rings, return spring, piston rod
Installation: Matches original brake air hoses, pins, support brackets and sealing washers
Working Condition: Quarry mining, aggregate yard, heavy earthwork and construction projects

Applicable Scenarios

It is installed at the rear axle parking brake mechanism of XCMG ZL50G and ZL50GL wheel loader, connected to the output air circuit of hand brake valve, widely used in quarry, aggregate yard and earthwork construction sites.

▪ OEM mounting dimension, stroke and port specification match original parts for direct installation
▪ Precision honed barrel inner wall reduces friction for smooth piston movement without delay
▪ Multi-layer composite seals resist oil and temperature change, providing excellent pressure holding
▪ Thick anti-rust piston rod resists bending and impact, avoiding seal damage
▪ High-performance return spring ensures quick reset and reliable parking lock
▪ Compact structure with reasonable clearance, no interference with axle housing and pipelines
▪ Compatible with hand brake valve, air reservoir, air pipes and brackets for convenient stock management
▪ Air tightness cycle inspection screens defective cylinders for stable parking brake operation

FAQ 

Q：Can the cylinder with air leakage keep working?
A：Operation is forbidden. Damaged seals cause insufficient brake force and rolling risk, replace immediately.

Q：What causes stiff piston rod movement?
A：Mud ingress, scratched rod or broken spring. Replacement of whole assembly is recommended.

Q：What is the symptom of internal leakage?
A：Enough air pressure but low thrust, slow or failed parking brake release.

Q：Can I replace seal rings only?
A：Seal kit is only for emergency use. Scratched barrel or rod will lead to repeated failure.

Q：How to store spare brake cylinder?
A：Store in dry ventilated area, seal ports and avoid pressing the piston rod.

Q：How to deal with slow parking brake release after installation?
A：Check air pressure and pipe leakage first, then verify cylinder stroke.

Q：How often to inspect under heavy mine load?
A: Inspect before each shift, check air leakage, jamming and loose connecting pins.