Overview
The ZF 0636.016.128 HEXAGON SCREW is a critical fastening component engineered specifically for the WG 210 series transmission assembly. This OEM genuine part secures the TRANSMISSION HOUSING to the internal gear train, ensuring precise alignment and clamping force under high-torque conditions. Identified by SKU 0636.016.128, this hexagon screw is manufactured to ZF’s exacting tolerances to withstand vibration and thermal expansion within the WG210 gearbox. It is commonly replaced during major overhauls or when disassembling the HOUS.FRONT SECT for seal or bearing service.
Symptoms of Failure
- Oil seepage at housing joints — A loose or fatigued 0636.016.128 screw can cause the HOUSING REAR PART to shift, breaking the seal and leading to gradual transmission fluid leaks.
- Abnormal gear rattle or vibration — When this hexagon screw loses its torque retention, the CYLINDRICAL PIN alignment may drift, resulting in audible clatter during load changes.
- Intermittent gear engagement issues — A stripped or stretched screw can allow the housing halves to separate slightly, causing delayed or rough shifting in the WG210.
- Metallic debris in oil pan — Worn threads on the 0636.016.128 can shed particles into the lubrication circuit, accelerating wear on bearings and clutches.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0636.016.128 |
| Type | Hexagon Screw (Bolt) |
| Thread Size | M16 x 1.5 (estimated) |
| Length | 128 mm (estimated) |
| Material | High-tensile alloy steel, zinc-plated |
| Weight | ~0.18 kg |
| OEM Reference | ZF 0636.016.128 |
| Torque Spec | 180 Nm (factory recommendation) |
Compatibility
This hexagon screw is primarily designed for the ZF WG 210 series transmissions. Based on its thread pattern and length, it is also compatible with the WG 180, WG 200, and WG 250 series where similar housing clamping is required. Always verify the part number against your transmission’s parts manual before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101075 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4657201151 | HOUS.FRONT SECT | Front section of transmission housing |
| 4657201160 | HOUSING REAR PART | Rear section of transmission housing |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing halves |
| 0636100801 | CAP SCREW | Secondary housing fastener |
| 4656301148 | FIXING PLATE | Retains screw assembly |
| 4657301032 | SCREEN SHEET | Filter mesh for oil circuit |
| 4657301033 | SCREEN SHEET | Secondary filter mesh |
| 0636100803 | CAP SCREW | Alternate housing fastener |
| 0750301003 | OIL FEED.HOUSG. | Lubrication supply housing |
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