252900339 air inlet pipe for XCMG ZL50G/ZL50GL Wheel Loader

product parameters

Product Name: Air Inlet Pipe for Hand Control Brake Valve
Part No.: 252900339
Applicable Model: XCMG ZL50G, ZL50GL Wheel Loader
Type: Brake air circuit inlet transfer hose
System Position: Hand control brake valve inlet
Structure: Inner rubber layer, reinforcement layer, outer rubber layer, metal fittings on both ends
Fitting Type: OEM standard interface (subject to actual product)
Function: Delivers compressed air to the hand control brake valve
Working Condition: Quarry mining, aggregate yard, heavy earthwork and construction projects

Applicable Scenarios

Used in the brake air circuit system of XCMG ZL50G and ZL50GL wheel loaders, installed at the hand control brake valve inlet to connect the air source and the valve. Widely used in quarry, aggregate yard, and earthwork construction sites requiring frequent parking braking and heavy-load travel. It is a key connection component for ensuring stable air supply to the parking and emergency brake circuits.

▪ OEM interface dimensions and length for direct replacement on ZL50G/ZL50GL
▪ Dedicated to the hand control brake valve inlet with routing consistent with the original layout
▪ Inner layer resists compressed air and minor oil mist; reinforcement layer provides reliable pressure capacity
▪ Outer layer resists wear and aging for dusty and muddy mine/aggregate site conditions
▪ Factory crimping quality inspection reduces fitting air leakage risk and ensures stable brake air supply
▪ Can be stocked together with hand control brake valves, air pipes, and fitting accessories for the same model

FAQ 

Q：When does the hand control brake valve inlet pipe need replacement?
A: Replace when the outer layer shows cracking, bulging, or severe wear exposing the reinforcement layer, or when air leakage appears at fittings. Inlet pipe leakage affects parking brake release and emergency braking function; continued use is not recommended.

Q：Is failure to release the parking brake always caused by the inlet pipe?
A: Not necessarily. Check whether air source pressure is normal, the hand control brake valve itself is seized, and the brake mechanism is mechanically stuck first. Inspect the inlet pipe for leakage or blockage after confirming air source and valve are normal.

Q：What to note during inlet pipe installation?
A: Avoid excessive bending or twisting; bending radius should not be too small. Do not force the pipe into position, which may damage the crimp area. Ensure clearance from surrounding components to prevent friction wear.

Q：Can 252900339 be used on other loader models?
A: Cross-model use is not recommended. The length and fitting type are designed for the ZL50G/ZL50GL hand control brake valve air circuit layout. Other models may have different interfaces. Confirm compatibility by part number.

Q：How to maintain the inlet pipe daily?
A: Periodically inspect the outer layer for wear, cracks, and bulging, and fittings for air leakage traces. During brake air circuit maintenance, check inlet pipe condition and replace promptly when aging signs appear.