Overview
The ZF 5838.300.639 REAR AXLE HOUSING is a structural core component within heavy-duty construction machinery drivelines. This OEM genuine part encloses and protects the differential and final drive gearsets, ensuring precise alignment under extreme torque loads. Positioned at the rear of the transmission assembly, the housing absorbs torsional stress and maintains lubrication integrity. The SKU 5838.300.639 is engineered to ZF’s original specifications, guaranteeing a direct fit for demanding off-highway applications. When paired with the 5838109012: DIFFERENTIAL, it forms the core of the axle assembly, while the 0750117075: TAPER ROLLER BEARING supports rotational stability within the housing bore.
Symptoms of Failure
- Oil seepage at axle flange: Cracks or porosity in the housing casting lead to visible gear oil leaks around the mounting face, often noticed after extended operation.
- Abnormal gear whine or howling: A worn housing bore allows the 2093209023: DIFFERENTIAL to misalign, creating a rhythmic metallic noise that intensifies under load.
- Excessive backlash in final drive: Housing distortion from impact damage causes uneven gear contact, resulting in a clunking sensation when shifting between forward and reverse.
- Bearing pocket wear: Repeated thermal cycling can enlarge the bearing seats, leading to premature failure of the 0750117075: TAPER ROLLER BEARING and subsequent axle shaft play.
Technical Specifications
| Specification | Value |
|---|---|
| OEM Part Number | 5838.300.639 |
| Material | Ductile cast iron (GGG-40) |
| Weight (approx.) | 42.5 kg (93.7 lbs) |
| Overall Length | 620 mm |
| Flange Bolt Pattern | 12 x M16 on 180 mm PCD |
| Bearing Bore Diameter | 110 mm |
| OEM Reference | ZF 5838.300.639 |
Compatibility
This rear axle housing is primarily designed for ZF WG180 and WG200 series power shift transmissions used in wheel loaders, graders, and telehandlers. It also fits select ZF 4WG-200 and 6WG-200 configurations where the housing casting shares the same mounting interface. The 5838300626: DIFFERENTIAL HOUSING is a direct mating component for this assembly. Always verify the axle ratio and housing casting number against your equipment’s serial plate before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 5838109012 | DIFFERENTIAL | Distributes torque between axle shafts |
| 0750117075 | TAPER ROLLER BEARING | Supports differential carrier rotation |
| 2093209023 | DIFFERENTIAL | Alternative differential assembly variant |
| 5838300626 | DIFFERENTIAL HOUSING | Encloses differential gears |
| 0631329088 | SPRING PIN | Secures differential pinion shaft |
| 5838300811 | THRUST WASHER | Controls axial clearance in differential |
| 5838300721 | AXLE BEVEL GEAR | Transfers power to wheel hubs |
| 5838300633 | AXLE | Driveshaft connecting differential to wheel |
| 5838300753 | THRUST WASHER | Reduces friction in gear stack |
| 5838300818 | THRUST WASHER | Secondary axial spacer for differential |
Frequently Asked Questions
Q: Can I reuse the old taper roller bearings when installing a new housing?
A: No. ZF recommends always replacing the 0750117075: TAPER ROLLER BEARING when fitting a new housing, as the bearing race seats to the bore during break-in.
Q: Does this housing include the differential carrier?
A: No. The 5838.300.639 is the bare housing casting only. You must transfer your existing 5838109012: DIFFERENTIAL or order it separately.
Q: What torque specification applies to the housing bolts?
A: For the M16 flange bolts, use 280 Nm with thread locker applied. Always consult your ZF service manual for final torque values.
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Phone: +86 158 2286 3467 |
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