252904208 brake cylinder assembly for XCMG ZL50G/ZL50GL Wheel Loader

product parameters

Product Name: Transmission Cut-off Cylinder
Part No.: 252904208
Applicable Model: XCMG ZL50G, ZL50GL Wheel Loader
Matching System: Transmission shift pneumatic control system
Cylinder Tube Material: Precision cold-drawn steel tube
Internal parts: Piston assembly, piston rod, guide sleeve, seal kit, air inlet fitting
Installation: Bolted on transmission bracket, air port connected to pneumatic pipeline
Working Condition: Quarry mining, aggregate yard, heavy-load earthwork
Inspection Items: Air tightness test, reciprocating fatigue test, thrust test, visual inspection

Applicable Scenarios

It is used for transmission shift pneumatic circuit of XCMG ZL50G and ZL50GL wheel loader, widely applied in quarry, aggregate yard and construction sites. It actuates power cut-off during shifting to reduce gear impact and achieve smooth gear change.

- OEM stroke and mounting dimension, holes and air ports match original equipment for direct installation without modification
- High-precision cold-drawn tube reduces friction for fast piston response and minimal shift delay
- Double sealing design: piston seal and rod wiper seal prevent cross air leakage and block dust ingress
- Polished anti-rust piston rod resists scratch and corrosion, avoiding cylinder scoring in dusty quarry environment
- Output thrust matched to transmission requirement, ensuring full travel of cut-off mechanism to prevent gear impact
- Compatible with air tank and pneumatic hoses of the same model for convenient spare parts management
- Fatigue inspection screens leaking or sticking units, protecting transmission gear set from damage

FAQ 

Q：Can leaking cut-off cylinder keep working temporarily?
A：Not recommended. Air leakage leads to insufficient thrust and gear impact, which may damage transmission gears. Replace it immediately.

Q：What causes weak piston rod movement?
A：Check air pressure and pipeline blockage first. If air supply is normal, internal seal aging and cross leakage is the main cause.

Q：What if piston rod extends but cannot retract?
A：Check return air pipeline. If air path is clear but rod still stuck, piston or guide sleeve seizure is suspected.

Q：Does new cylinder need commissioning after installation?
A：Test shift cycles repeatedly after installation. Confirm smooth stroke and no leakage before operation.

Q：What to check on receiving goods?
A：Verify part number, check scratches on tube and rod, inspect thread integrity and test stroke with air supply.

Q：Can this cylinder fit other loader models?
A：Not recommended. Stroke, thrust and mounting are customized for ZL50G and ZL50GL. Mismatch causes incomplete power cut.