Overview
The ZF 5838.117.018 REAR AXLE HOUSING is a critical structural component within the final drive assembly of heavy-duty construction machinery transmissions. This OEM genuine part encloses and protects the differential and axle shafts, ensuring precise alignment under extreme torsional loads. As the primary load-bearing casing, it absorbs shock from the driveline while maintaining lubrication integrity. The SKU 5838.117.018 is engineered to ZF’s exacting metallurgical standards, providing a rigid foundation for the DIFFERENTIAL HOUSING and supporting the DIFFERENTIAL assembly that transfers power to the wheels.
Symptoms of Failure
- Visible oil seepage from axle housing seals: Cracks or porosity in the housing casting cause gear oil to weep around the axle flanges, leaving telltale dark stains on the undercarriage.
- Excessive driveline backlash or clunking: A fatigued housing allows the TAPER ROLLER BEARING bores to distort, creating play that manifests as a metallic knock during acceleration or deceleration.
- Premature differential bearing failure: Warped mounting surfaces misalign the DIFFERENTIAL carrier, leading to uneven bearing wear and eventual seizure.
- Vibration through the chassis at highway speeds: A cracked housing loses its geometric rigidity, causing the entire rear axle assembly to oscillate and transmit vibration into the cab.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 5838.117.018 |
| Material | Ductile iron GGG-50 (EN-GJS-500-7) |
| Overall Length | 820 mm (32.3 in) |
| Flange Diameter | 280 mm (11.0 in) |
| Dry Weight | 38.5 kg (84.9 lbs) |
| Bearing Bore Diameter | 110 mm (4.33 in) |
| OEM Reference | ZF 5838.117.018 |
Compatibility
This rear axle housing is designed for ZF’s WG-series powershift transmissions commonly used in wheel loaders, graders, and telehandlers. It is a direct fit for the ZF WG180 and ZF WG200 transmission models, as well as the ZF 4WG-200 series. The housing interfaces with the DIFFERENTIAL HOUSING (part 5838300626) and accepts the DIFFERENTIAL assembly (part 5838109009). Always verify axle ratio and mounting bolt pattern before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 5838109009 | 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 and bearings |
| 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 on axle gear faces |
| 5838300818 | THRUST WASHER | Adjusts differential side gear clearance |
Frequently Asked Questions
Q: Can the 5838.117.018 housing be repaired if cracked?
A: Welding is not recommended due to the ductile iron’s heat-affected zone embrittlement. Replacement with this OEM genuine part ensures proper load distribution and avoids stress risers that lead to repeat failures.
Q: What torque specification applies to the housing mounting bolts?
A: ZF specifies 180 Nm (133 ft-lbs) for M16 grade 10.9 bolts, applied in a cross-pattern sequence. Always use new lock washers and consult the service manual for your specific transmission model.
Q: Does this housing include the differential carrier bearings?
A: No. The housing is supplied as a bare casting. You must install the TAPER ROLLER BEARING (part 0750117075) and the DIFFERENTIAL assembly (part 5838109009) separately during rebuild.
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Phone: +86 158 2286 3467 |
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