Overview
The ZF 5838.300.535 STUD is a precision-machined locating pin engineered for secure fastening within heavy-duty construction machinery transmissions. This OEM genuine part functions as a critical alignment component, ensuring that internal gear clusters and differential assemblies remain properly seated under extreme torque loads. Specifically designed to anchor the differential housing to the transmission casing, the stud prevents axial movement that could lead to gear misalignment. The SKU 5838.300.535 is manufactured to ZF’s exacting tolerances, making it a direct replacement for worn or sheared studs in high-stress environments. When installed alongside a 5838300626: DIFFERENTIAL HOUSING, this stud maintains the structural integrity of the entire power transfer system.
Symptoms of Failure
- Transmission housing oil leaks around the stud boss: A worn or fractured 5838.300.535 stud allows the differential housing to shift, breaking the seal between mating surfaces and causing hydraulic fluid seepage.
- Intermittent gear slipping under load: When the stud loses its clamping force, the 5838109010: DIFFERENTIAL can walk out of alignment, resulting in partial disengagement of planetary gears during heavy excavation.
- Metallic knocking from the transmission bell housing: A loose stud permits the 2093209023: DIFFERENTIAL to oscillate, creating audible impact noise against the case walls.
- Premature bearing wear: Misalignment caused by a failed stud accelerates degradation of the 0750117075: TAPER ROLLER BEARING, as uneven loading creates hot spots on the raceways.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 5838.300.535 |
| Material | Case-hardened alloy steel (20MnCr5 equivalent) |
| Thread Size | M16 x 2.0 (coarse pitch) |
| Overall Length | 85 mm |
| Thread Length | 45 mm |
| Head Type | Hexagon socket (8 mm drive) |
| Weight | 0.12 kg |
| OEM Reference | ZF 5838.300.535 |
| Surface Treatment | Zinc-nickel plating (corrosion resistant) |
| Hardness | HRC 28-32 core, HRC 58-62 case |
Compatibility
This stud is a standard fastening element in ZF’s WG series powershift transmissions used in wheel loaders and graders. It is directly compatible with the WG180, WG200, and WG220 models. The 5838.300.535 also appears in the 4WG-200 and 5WG-180 variants, where it secures the differential housing to the main case. For 6WG-250 transmissions, verify thread engagement depth, as the housing thickness differs slightly. Always replace this stud in pairs when servicing the differential assembly to maintain even clamping force.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 5838109010 | DIFFERENTIAL | Distributes torque between drive axles |
| 0750117075 | TAPER ROLLER BEARING | Supports differential carrier rotation |
| 2093209023 | DIFFERENTIAL | Alternate differential assembly for WG200 |
| 5838300626 | DIFFERENTIAL HOUSING | Encloses differential gears |
| 0631329088 | SPRING PIN | Retains shift fork position |
| 5838300811 | THRUST WASHER | Controls axial play in differential |
| 5838300721 | AXLE BEVEL GEAR | Transfers power to wheel hubs |
| 5838300633 | AXLE | Connects differential to final drive |
| 5838300753 | THRUST WASHER | Reduces friction on side gears |
| 5838300818 | THRUST WASHER | Spacer for differential pinion shaft |
