The 800106844 Clutch Housing is a genuine XCMG cast iron component designed for motor grader powershift transmissions. This precision‑machined housing encloses the clutch packs, piston assemblies, and rotating clutches in XCMG GR series graders. Manufactured from high‑strength gray cast iron with ribbed reinforcement for rigidity and thermal stability, the 800106844 clutch housing provides accurate alignment of clutch drums, shafts, and bearings while withstanding the extreme hydraulic pressures and shock loads encountered during heavy grading operations.
The 800106844 clutch housing is a direct replacement for cracked, warped, or corroded housings in XCMG GR135, GR165, GR180, GR215, GR260, GR300, and GR350 motor graders. Typical applications include the forward/reverse clutch housing, speed clutch sections, and steering clutch housings. The housing features precision‑bored bearing seats, machined sealing surfaces for piston bores, and strategically placed oil passages to direct hydraulic fluid to each clutch pack.
A damaged clutch housing leads to loss of hydraulic pressure, clutch slippage, cross‑leakage between clutches, and eventual transmission failure. Replacing a faulty housing with the genuine XCMG 800106844 restores proper clutch alignment, ensures leak‑free hydraulic circuits, and protects your grader’s transmission investment.
| Parameter | Specification |
|---|---|
| OEM Number | 800106844 |
| Brand | XCMG (Genuine Original Equipment) |
| Product Type | Clutch Housing / Transmission Clutch Case |
| Material | High‑strength gray cast iron (GG25 / EN‑GJL‑250) |
| Tensile Strength | ≥ 250 MPa (36,000 psi) |
| Hardness (HB) | 190 – 240 HB |
| Clutch Piston Bore Diameter | 230 mm (±0.05 mm, precision honed) |
| Number of Clutch Pockets | 3 (forward, reverse, and speed clutch) |
| Max. Operating Hydraulic Pressure | 18 bar (1.8 MPa / 260 psi) |
| Bearing Bore Tolerance | ISO H6 (e.g., 110 mm +0.022 / -0) |
| Oil Passage Diameters | 6 mm, 8 mm, 10 mm (drilled and deburred) |
| Surface Finish (sealing faces) | Ra ≤ 1.6 µm (milled or ground) |
| Operating Temperature Range | -40°C to +150°C (-40°F to +302°F) |
| Corrosion Protection | Phosphate wash + oil impregnant (internal passages) |
| Standards | XCMG drawing 800106844 / ASTM A48 Class 35 |
| Compatible Models | XCMG GR135, GR165, GR180, GR215, GR260, GR300, GR350 motor graders |
| Superseded Part Numbers | 800106801, 800106815, 800106830, 800106838 |
The XCMG 800106844 clutch housing is the structural core of the motor grader’s powershift transmission. It contains the clutch packs, apply pistons, return springs, and hydraulic oil galleries. The housing positions the clutch drums and reaction plates with micrometer precision, ensuring that each clutch pack engages and disengages without drag or misalignment.
Inside the housing, hydraulic fluid is routed through precision‑drilled passages to each clutch piston. When a solenoid valve opens, pressurized oil enters the piston chamber, compressing the clutch pack against the housing’s built‑in pressure plate surface. This design eliminates external clutch linkage and provides fast, smooth shifts.
If the housing cracks or its internal oil seals fail, cross‑leakage between clutches can occur, causing simultaneous engagement of forward and reverse gears – a dangerous condition. Replacing a compromised housing with the genuine 800106844 restores hydraulic integrity, prevents clutch overlap, and ensures reliable gear selection.
Each 800106844 clutch housing is produced by resin‑sand casting using GG25 gray cast iron, selected for its excellent vibration damping, thermal stability, and machinability. The casting process incorporates internal cores to form complex oil passages and piston bores, reducing the need for secondary drilling.
After casting, the housing undergoes stress relieving (annealing) to eliminate residual casting stresses that could cause warpage over time. Precision CNC machining then cuts all bearing bores, piston bores, mounting faces, and oil passage openings. Bearing bores are honed to ISO H6 tolerances to ensure correct bearing interference fits.
All sealing faces are ground or milled to a surface finish of Ra ≤ 1.6 µm, ensuring O‑ring and gasket seals perform reliably under pressure. Each housing is pressure‑tested at 20 bar (1.5 times operating pressure) to verify no internal leakage or porosity. XCMG also performs ultrasonic wall thickness checks.
Replacing the 800106844 clutch housing requires complete transmission disassembly. Drain the oil, remove the transmission from the grader, and separate the clutch housing from the main gear case. Label all components and take care not to damage bearing bores or sealing surfaces.
Clean the new housing thoroughly with solvent and blow out all oil passages with compressed air. Inspect for casting debris or machining chips. Install new lip seals, O‑rings, and backup rings into the housing’s piston bores. Lubricate seals with transmission fluid before inserting clutch pistons.
Assemble clutch packs, steel plates, friction plates, and reaction plates into the housing. Torque all housing bolts to factory specification (typically 45‑55 N·m for M10 bolts). After reassembly, perform a leak test by applying low air pressure (2‑3 bar) to each clutch port – the pistons should move and return without sticking.
Typical indicators of a damaged 800106844 clutch housing include: transmission fluid leakage at the housing seam, loss of a specific clutch (no forward or reverse), cross‑engagement (simultaneous forward and reverse), low hydraulic pressure in one clutch circuit, and the presence of cast iron flakes in the oil or filter.
Cracks often develop near oil passage intersections or at bolt hole bosses. Over‑tightening of bolts during previous repairs can also cause hidden cracks. Always replace a cracked housing – welding cast iron in a stressed transmission case is not reliable. Invest in a genuine new 800106844 housing for safety and durability.
Aftermarket clutch housings are often made from lower‑grade cast iron (e.g., GG20) that lacks the strength and wear resistance of GG25. They may have porosity issues leading to oil leaks, or poorly machined bearing bores that cause premature bearing failure. Some counterfeit housings have incorrectly positioned oil passages, resulting in cross‑leakage and clutch drag.
Genuine XCMG 800106844 housings are produced from controlled iron batches with spectrographic analysis. Machining is performed on CNC machining centers with tool offsets verified per batch. Each housing is serialized and pressure‑tested before packaging.
XCMG provides a 12‑month warranty against manufacturing defects. Using genuine XCMG housings ensures proper clutch alignment, leak‑free operation, and compatibility with all other internal components. Don’t risk a transmission rebuild with substandard castings.
Inspect the 800106844 clutch housing during major transmission overhauls (every 5,000‑6,000 hours). Look for external cracks, fretting corrosion on mounting flanges, and erosion of oil passage edges. Use a dye penetrant test kit to reveal hairline cracks that are not visible to the naked eye.
If the housing has been subject to a bearing failure or clutch seizure, it may have hidden distortion. Check flatness of sealing faces with a straightedge and feeler gauge – warpage exceeding 0.1 mm requires housing replacement. Never reuse a housing that has been overheated (discoloration from blue/brown indicates metallurgical damage).
Proactively replace the clutch housing when rebuilding the transmission with new bearings and seals. The cost of a new 800106844 housing is a small fraction of the total rebuild price and provides peace of mind. Keep a spare housing in stock for emergency transmission repairs.
The 800106844 Clutch Housing is stocked in XCMG regional warehouses: Houston (North America), Rotterdam (Europe), Dubai (Middle East), and Shanghai (Asia). Standard air freight delivers within 3‑7 business days; expedited shipping (1‑2 days) is available for urgent transmission repairs. Sea freight options are offered for bulk orders.
Each housing is individually wrapped in anti‑static bubble wrap and placed in a reinforced cardboard box or wooden crate. For large fleets, consignment stock programs can put a housing within reach within hours. Don’t let a cracked clutch housing cause extended downtime.
Order the genuine XCMG 800106844 Clutch Housing today and restore your motor grader’s transmission to factory reliability. Whether you are performing a complete rebuild or replacing a damaged case, the 800106844 guarantees correct fit, leak‑free oil passages, and robust structural integrity. Protect your grader’s drivetrain with XCMG original parts.
Upgrade your transmission maintenance with OEM‑grade XCMG components. The 800106844 clutch housing reflects decades of engineering experience in heavy‑duty powershift transmissions. Trust XCMG genuine parts to keep your GR series motor graders shifting precisely and operating efficiently for thousands of hours.
