252109474 energizing cylinder for XCMG ZL50G/ZL50GL Wheel Loader

252109474 energizing cylinder for XCMG ZL50G/ZL50GL Wheel Loader Featured Image
  • 252109474 energizing cylinder for XCMG ZL50G/ZL50GL Wheel Loader

Short Description:

Booster Pump Assembly, Part No.252109474, fits XCMG ZL50G, ZL50GL wheel loader. It is the core power assist assembly of service brake system.

Product Detail

Product Tags

description

This 252109474 booster pump assembly is matched for brake system of XCMG ZL50G and ZL50GL wheel loader. It integrates air assist chamber, hydraulic cylinder, piston assembly, seals, oil ports and air ports. When the brake pedal is depressed, compressed air from air reservoir enters the assist chamber to push the piston and convert air force into hydraulic pressure for wheel brakes. When releasing the pedal, return spring resets the piston and releases brake pressure. Mounting dimensions, port layout and stroke follow OEM drawings for direct replacement. It is compatible with original oil hoses, air hoses and brackets without pipeline modification. Every unit passes air tightness, hydraulic pressure and cycle durability test. It withstands dusty and muddy working conditions, preventing heavy pedal feel and long braking distance caused by assist failure.

product parameters

Product Name: Booster Pump Assembly
Part No.: 252109474
Applicable Model: XCMG ZL50G, ZL50GL Wheel Loader
Function: Air-over-hydraulic brake assist for boosting brake force
Housing Material: Cast aluminum
Internal Structure: Air assist piston, hydraulic plunger, return spring, composite seal set
Working Media: Compressed air, brake fluid
Installation: Matches original brake oil pipes, air hoses, brackets and pins
Working Condition: Quarry mining, aggregate yard, heavy earthwork and construction projects
Inspection Items: Air tightness test, hydraulic pressure test, cycle durability test, leakage inspection

Applicable Scenarios

It is mounted under the cab of XCMG ZL50G and ZL50GL wheel loader, connected to air reservoir and axle brake hydraulic lines, widely used in quarry, aggregate yard and earthwork construction sites.

advantage

▪ OEM mounting holes, port layout and piston stroke match original parts for direct replacement
▪ Lightweight cast aluminum housing improves heat dissipation and protects brake fluid
▪ Multi-layer seals separate air and oil chambers to prevent cross leakage
▪ Heavy-duty return spring provides fast reset to avoid brake dragging
▪ Precisely honed piston reduces friction for smooth, light pedal feel
▪ Dust-proof design keeps sand out and reduces piston sticking
▪ Compatible with air reservoir, brake hoses, brake valves and brake cylinders
▪ Dual air & hydraulic leakage inspection screens defective pumps for safe brake assist

FAQ 

Q：Can the booster pump with air-oil cross leakage keep working?
A：Stop operation immediately. Cross contamination causes unstable and weak braking. Replace it at once.

Q：What causes heavy, stiff brake pedal?
A：Blocked air supply, stuck piston or failed assist seal leads to loss of boost.

Q：What are risks of brake dragging?
A：Continuous friction overheats brake discs, accelerates wear and increases fuel consumption.

Q：Can I repair it with seal kit only?
A：Only for temporary emergency. Scratched cylinder wall will cause repeated leakage.

Q：How to store spare booster pump?
A：Store in dry place, seal ports and protect housing from impact.

Q：Is weak brake force always caused by booster pump?
A：Check air pressure, pipeline leakage and air in brake circuit first.

 

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