Overview
The ZF 4657.183.085 LOOSE PARTS set is a critical OEM genuine service kit designed specifically for the WG 210 series transmission. This assembly contains the internal fasteners, locating elements, and small hardware required to secure the main housing sections and internal components during a rebuild or overhaul. The SKU 4657.183.085 ensures that every bolt, pin, and washer meets ZF’s exacting tolerances for clamping force and alignment. Without this loose parts kit, the structural integrity of the transmission housing assembly is compromised, leading to misalignment of the gear train and potential oil leakage paths. This part is typically replaced whenever the 4657101033: TRANSMISSION HOUSING or the 4657201027: HOUS.FRONT SECT is removed for service.
Symptoms of Failure
When the loose parts within this kit wear out or are not replaced during a rebuild, several distinct failure modes emerge. Oil seepage at housing mating faces is the most common symptom, as degraded fasteners lose their clamping torque. You may also notice abnormal gear rattle or vibration during low-speed operation, indicating that the 0631306792: CYLINDRICAL PIN has sheared or worn, allowing housing sections to shift. Another telltale sign is difficulty engaging gears or intermittent slipping, which occurs when the 4657201012: HOUSING REAR PART loses its precise alignment due to worn locating hardware. Finally, metal debris in the oil pan can indicate that a cap screw from this kit has fractured and fallen into the gear train.
Technical Specifications
| Specification | Value |
|---|---|
| OEM Part Number | 4657.183.085 |
| Material Composition | Steel (fasteners) / Zinc-plated alloy (pins) |
| Total Weight (kit) | 0.85 kg (1.87 lbs) |
| Fastener Torque Range | 45–60 Nm (M8 bolts) |
| Operating Temperature Range | -40°C to +120°C |
| OEM Reference | ZF Friedrichshafen AG |
| Hardness (Cylindrical Pin) | HRC 45-50 |
Compatibility
This ZF 4657.183.085 LOOSE PARTS kit is primarily engineered for the WG 210 series transmission, but its hardware dimensions also make it suitable for the WG 180 and WG 200 series models that share the same housing bolt pattern. It is also compatible with select WG 211 variants produced after 2015. Always verify the housing casting number before ordering; the kit will not fit the older WG 160 series due to different thread pitches. When servicing these transmissions, always pair this kit with a new 0636100801: CAP SCREW and a 4656301148: FIXING PLATE to ensure proper load distribution across the housing flanges.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101033 | TRANSMISSION HOUSING | Main structural casing for gear assembly |
| 4657201027 | HOUS.FRONT SECT | Front section housing for input shaft |
| 4657201012 | HOUSING REAR PART | Rear section housing for output shaft |
| 0631306792 | CYLINDRICAL PIN | Alignment dowel for housing sections |
| 0636100801 | CAP SCREW | M8 bolt for housing fastening |
| 4656301148 | FIXING PLATE | Locking plate for fastener retention |
| 4657301032 | SCREEN SHEET | Oil filter screen (fine mesh) |
| 4657301033 | SCREEN SHEET | Oil filter screen (coarse mesh) |
| 0636100803 | CAP SCREW | M10 bolt for heavy-duty clamping |
| 4681301040 | OIL FEED.HOUSG. | Oil supply housing for lubrication circuit |
