Overview
The ZF 0636.101.058 CAP SCREW is a critical OEM fastening component engineered for the WG100, WG130, and WG131 transmission series. This genuine part secures internal assemblies within the gearbox housing, ensuring precise clamping force to maintain hydraulic pressure and mechanical alignment. The SKU 0636.101.058 is specifically designed to withstand high torque loads and thermal cycling found in heavy-duty industrial transmissions. When installed correctly, this cap screw prevents loosening of key components such as the 4699100080: BASIC GEARBOX assembly, safeguarding the entire drivetrain from premature wear.
Symptoms of Failure
When the ZF 0636.101.058 cap screw fatigues or strips, operators may notice these specific failure indicators:
- Oil seepage around the housing joint – A loose or fractured cap screw compromises the seal between the gearbox casing and the 0634309122: SHAFT SEAL, leading to visible fluid loss.
- Intermittent gear engagement – Reduced clamping force allows internal components to shift, causing hesitation or grinding during shifts under load.
- Abnormal vibration at the bell housing – A failing cap screw permits micro-movement of the 0634801038: SEALING RING, generating low-frequency rumble during operation.
- Torque converter shudder – Loss of fastener integrity can misalign the pump drive, creating shudder during torque converter lockup.
Technical Specifications
| Part Number | 0636.101.058 |
| Type | Hexagon Head Cap Screw |
| Thread Size | M10 x 1.5 (estimated) |
| Length | 35 mm (estimated) |
| Material | Alloy Steel, Grade 10.9 |
| Weight | 0.035 kg (estimated) |
| OEM Reference | ZF 0636.101.058 |
| Finish | Zinc-Plated, Yellow Passivated |
Compatibility
This cap screw is directly compatible with ZF WG100, WG130, and WG131 transmissions used in off-highway vehicles, agricultural tractors, and material handling equipment. It also fits select variants of the WG180 and WG200 series where the same M10 thread pattern is employed for housing retention. For proper torque specification, always reference the service manual for your specific transmission model. When replacing this fastener, it is recommended to also inspect the 0630000091: SHIM RING for wear, as incorrect shim clearance can accelerate cap screw fatigue.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4699100080 | BASIC GEARBOX | Complete transmission housing assembly |
| 0634309122 | SHAFT SEAL | Prevents fluid leakage at output shaft |
| 0634801038 | SEALING RING | Static seal for housing joints |
| 0630000091 | SHIM RING | Adjusts bearing preload clearance |
| 0630000255 | SHIM RING | Thickness variation for preload tuning |
| 0630000058 | SHIM RING | 0.5 mm shim for axial adjustment |
| 0630000059 | SHIM RING | 0.8 mm shim for fine clearance |
| 0630000061 | SHIM RING | 1.0 mm shim for major adjustment |
| 0501341241 | WHEEL STUD | Wheel mounting fastener |
| 0750117782 | TAPERED ROLLER BEARING | Supports radial and axial loads |
