800302251 transmission for XCMG ZL50G/ZL50GL Wheel Loader

product parameters

Part No：800302251
Product Type：Transmission Torque Converter Integrated Assembly
Applicable Equipment：XCMG ZL50G / ZL50GL 5 Ton Wheel Loader
Core Technology：Double-turbine hydraulic torque converter, alloy steel planetary gear, wet multi-plate clutch, hydraulic power shift, forced circulation cooling lubrication
Material：High strength cast iron housing + alloy steel gear set
Max Input Power：162kW
Max Input Torque：850N·m
Torque Converter Type：Double-turbine four-element
Forward Gears：4
Reverse Gears：3
Working Oil Pressure：1.4~1.8MPa
Working Temperature Range：-20℃ ~ +110℃
Single Weight：980kg
Installation：Bolt fixed to engine flywheel housing, connect drive shaft and hydraulic pipeline
Application：Integrated power transmission assembly, multiply torque, transfer engine power, realize loaded gear shift and forward/reverse control

• Integrated cast housing design, compact layout, high rigidity, resist heavy impact deformation.
• Double-turbine torque converter, high torque multiplication ratio at low speed, strong digging performance.
• Alloy steel planetary gear set with carburizing treatment, wear-resistant and anti-pitting, long service life.
• Wet multi-plate clutch with hydraulic buffer control, smooth shifting and low impact during frequent forward/reverse operation.
• Forced circulation cooling & lubrication circuit, good heat dissipation, effectively prevent clutch overheating and burning.
• OEM matched mounting dimensions and oil ports, direct replacement without modification.
• Strong dirt tolerance, adapt to dusty mine and aggregate yard working conditions.
• Complete bench running inspection before delivery, test torque, shift function and sealing to reduce field failure risk.

FAQ 

Q：What signs mean the assembly needs replacement?
A：Severe power loss during digging, obvious slipping under heavy load, abnormal knocking noise inside housing, continuous heavy oil leakage, overheating alarm and failure to shift gears.

Q：What should be noted during installation?
A：Clean flywheel housing and hydraulic pipelines before installation; align assembly with engine flywheel; fasten bolts by specified torque; fill with specified transmission oil and perform no-load test before heavy-duty work.

Q：What are common causes of damage?
A：Long-time overload digging; deteriorated or contaminated transmission oil; oil filter blockage causing insufficient lubrication; frequent violent shifting; sand and metal debris entering the oil circuit.

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

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

Q：What failures will a failed assembly cause?
A：Damaged assembly results in torque loss, insufficient digging power and slipping. Severe damage leads to loss of traction and secondary damage to engine and drive axle.

Q：How long is the service life of this transmission torque converter assembly?
A：Service life depends on load, oil maintenance and working environment. Check oil quality and oil level monthly under normal working conditions. Shorten oil change cycle for quarry and mine sites. Replace when major faults occur.