The genuine XCMG 800357648 Hydraulic Transmission is a fully powershift unit designed for motor grader GR series models, providing smooth torque conversion and multiple speed ranges. This OEM 800357648 transmission integrates a torque converter, planetary gear sets, and a hydraulic control valve block for precise direction and speed changes. Manufactured from high‑strength cast iron with hardened gears and steel clutches, it delivers reliable power transfer under extreme grading loads. Engineered for XCMG GR135, GR165, GR180, GR215, GR260, GR300, and GR350 motor graders, this transmission is a direct replacement for original equipment with identical mounting points, input shaft splines, and output flange dimensions.
The hydraulic transmission converts engine torque into tractive effort, enabling forward/reverse motion, six forward speeds, and three reverse speeds. A worn or damaged transmission causes slipping, harsh shifting, loss of drive, and overheating. Replacing a failed unit with genuine XCMG 800357648 restores smooth gear changes, full power transfer, and drivetrain reliability.
This component is also used in articulated dump trucks and wheel loaders within the XCMG family. XCMG 800357648 guarantees OE fit, factory‑set clutch pressures, and long service life under continuous heavy‑duty operation.
| Parameter | Specification |
|---|---|
| OEM Number | 800357648 |
| Brand | XCMG (Genuine Original Equipment) |
| Transmission Type | Fully powershift, hydraulically actuated, planetary gears |
| Number of Speeds | 6 forward / 3 reverse |
| Torque Converter Type | Single‑stage, 3‑element, with lock‑up clutch (optional) |
| Input Torque Capacity (Max) | 1200 Nm (885 lb‑ft) |
| Clutch Type (Wet) | Hydraulically actuated, multiple steel and friction discs |
| Housing Material | Nodular cast iron (GGG50) |
| Gear Material | Case‑hardened steel (18CrNiMo7‑6) |
| Lubrication | Pressurized forced feed + splash |
| Oil Capacity (Approx.) | 28 litres (7.4 US gal) |
| Control Type | Electro‑hydraulic / Manual valve body |
| Operating Temperature Range | -30°C to +120°C (with proper oil cooler) |
| Weight (Dry) | 310 kg (683 lb) |
| Compatible Models | XCMG GR135, GR165, GR180, GR215, GR260, GR300, GR350 |
| Superseded Part Numbers | 800357635, 800357642, 800357645 |
The 800357648 hydraulic transmission is the central component that transfers engine power to the final drives and wheels. It multiplies torque through the torque converter and provides smooth direction changes via hydraulic clutches.
A failing transmission causes erratic shifting, slipping in high gear, and excessive heat generation. Without proper transmission function, the grader loses mobility and grading efficiency.
Replacing a worn or internally damaged transmission with genuine XCMG 800357648 restores all six forward speeds, precise clutch engagement, and full tractive effort for heavy blade loads.
The unit is designed for continuous operation in dusty, high‑ambient temperature environments, with a heavy‑duty oil cooler circuit to maintain optimal lubricant viscosity.
Each 800357648 transmission features case‑hardened and profile‑ground planetary gears with 58‑62 HRC surface hardness. The clutches use sintered bronze friction plates mated with steel separator plates for consistent engagement.
The hydraulic control valve block incorporates modulating spools that cushion shifts, reducing shock loading on the drivetrain. All seals are Viton® for high‑temperature resistance.
XCMG tests every transmission on a dyno for pressure rise time, clutch pack fill, and shift quality. No unit is shipped without passing a 2‑hour run‑in and a 30‑minute loaded test.
The housing is stress‑relieved after casting and machined to tight tolerances, ensuring proper bearing alignment and minimal gear whine.
Transmission replacement is a major repair requiring lifting equipment and skilled technicians. Drain the oil, disconnect drive shafts, wiring, cooler lines, and shift linkage.
Support the transmission and unbolt it from the engine bellhousing and frame mounts. A transmission jack is required due to the 310 kg weight.
Before installing the new 800357648 unit, clean the engine adapter and replace the pilot bearing. Align the torque converter with the flexplate and torque the mounting bolts to 90 Nm.
Refill with XCMG‑approved transmission oil (Allison C4 or equivalent). Prime the system and check for leaks after running the engine at idle.
Always replace the oil filter and flush the cooler lines when changing the transmission. Keep a spare unit in your fleet inventory for large operations.
Slipping when shifting into forward or reverse, delayed engagement, harsh clunks, oil contamination with metal particles, and overheating beyond 120°C.
Also, abnormal whining or grinding noises, loss of climbing ability on slopes, and failure to move even with engine revving. Replace immediately to avoid further damage.
Change transmission fluid and filter every 1,000 operating hours or annually. Use only recommended oil (SAE 10W or 30W with Allison C4 specification).
Inspect for leaks, check shift quality, and listen for unusual noise every 250 hours. A pressure gauge can verify clutch apply pressures (1.2‑1.5 MPa at stall).
XCMG recommends a full transmission rebuild or replacement every 8,000‑10,000 hours under normal grading conditions. In harsh use (heavy ripping, high‑speed road grading), shorten to 5,000 hours.
Always keep the transmission breather clean to prevent moisture ingress and pressure buildup. A clogged breather can cause seal leakage.
Genuine XCMG 800357648 hydraulic transmissions are backed by a 12‑month warranty. Stocked in regional warehouses: Houston (USA), Rotterdam (Netherlands), Dubai (UAE), Shanghai (China).
Due to size and weight, ocean freight is standard (2‑4 weeks). Air freight available for urgent needs at additional cost. Volume discounts for fleet orders (3+ units).
Aftermarket transmissions often use softer gear materials, weak clutch discs, and uncalibrated valve bodies. Genuine XCMG 800357648 ensures correct metallurgy, clutch friction material, and shift timing.
Don’t risk drivetrain failure – a failed transmission can strand your grader far from the shop. Keep a genuine spare unit in your major parts inventory for planned overhauls.
Order the genuine XCMG 800357648 Hydraulic Transmission today and maintain peak drivetrain efficiency, smooth shifting, and long‑term reliability for your motor grader.
Upgrade your grader’s power transfer with XCMG genuine transmissions – dyno‑tested, precision assembled, and ready for the toughest grading applications.
