250300363 transmission for XCMG ZL50G/ZL50GL Wheel Loader

product parameters

Part No：250300363
Product Type：Transmission Assembly
Applicable Equipment：XCMG ZL50G / ZL50GL 5 Ton Wheel Loader
Core Technology：Alloy steel planetary gear, wet multi-plate clutch, hydraulic power shift, forced circulation lubrication cooling system
Material：High strength cast iron housing + alloy steel gear set
Transmission Type：Hydraulic power shift planetary transmission
Forward Gears：4
Reverse Gears：3
Max Input Power：162kW
Max Input Torque：850N·m
Working Oil Pressure：1.4~1.8MPa
Working Temperature Range：-20℃ ~ +110℃
Single Weight：860kg
Installation：Bolt fixed to engine torque converter housing, connect with drive shaft and hydraulic pipeline
Application：Core power transmission assembly, transfer engine power, realize loaded gear shift and forward/reverse control

• High-strength cast iron housing, strong rigidity, resist deformation under heavy impact load.
• Carburized alloy steel planetary gear set, high wear resistance, anti-pitting, long service life.
• Wet multi-plate clutch design, smooth power shift, low impact during frequent forward/reverse operation.
• Forced circulation lubrication & cooling circuit, effective heat dissipation, prevent overheating and clutch burning.
• OEM matched interface and oil port layout, direct replacement, no modification required.
• Integrated hydraulic control valve, stable oil pressure control, reduce slipping risk under heavy load.
• Strong adaptability for dusty construction sites, good tolerance for contaminated hydraulic oil.
• Full bench running inspection before delivery, test shift function, pressure and sealing to reduce field failure.

FAQ 

Q：What signs mean the transmission assembly needs replacement?
A：Serious clutch slipping, no power in certain gears, abnormal knocking noise inside housing, continuous heavy oil leakage, overheating alarm and unable to shift gears.

Q：What should be noted during transmission installation?
A：Clean mating surfaces and hydraulic pipelines before installation; align the assembly with torque converter; use specified torque for all fastening bolts; fill with recommended transmission oil after installation and conduct air test before loading operation.

Q：What are common causes of transmission damage?
A：Long-term overload operation; poor lubrication or deteriorated transmission oil; oil filter blockage leading to insufficient oil supply; frequent violent shifting; oil contamination with sand and metal debris.

Q：Can faulty transmission assembly be repaired and reused?
A：Minor internal damage can be overhauled by professional technicians. If gear broken, clutch pack severely burnt or housing cracked, overhaul cannot guarantee long-term reliability, better to replace complete assembly.

Q：How to inspect transmission during daily maintenance?
A：Check transmission oil level, oil quality, abnormal noise and oil leakage before heavy-load operation. Focus inspection on oil temperature, pressure and gear shift response during operation.

Q：What failures will a failed transmission cause?
A：Damaged transmission leads to slipping, power loss, difficulty in shifting. Severe damage will cause gear locking, loss of traction, and further damage to engine and drive axle.

Q：Can this transmission fit other loader models?
A：This transmission assembly is custom made for ZL50G/ZL50GL. Gear ratio, mounting dimensions and hydraulic interface are exclusive. It cannot be fitted directly on other models without modification. Wrong replacement will result in assembly mismatch.