Overview
The ZF 4657.183.185 LOOSE PARTS set is a critical OEM genuine service kit designed specifically for the WG 210 Series transmission. This assembly contains the essential loose hardware and small components required to secure and align internal transmission sections during a rebuild or overhaul. Positioned within the main gearcase, these parts interface directly with the housing structure to maintain precise gear train alignment and prevent axial movement under load. The SKU 4657.183.185 is a factory-sealed kit that replaces worn or missing fasteners and locating elements, ensuring the transmission maintains its original ZF tolerances. When paired with a new TRANSMISSION HOUSING, this kit restores the structural integrity of the WG210 assembly.
Symptoms of Failure
- Oil seepage at housing joints: Worn or deformed loose parts can cause micro-gaps between the HOUS.FRONT SECT and the main case, leading to slow oil leaks that worsen under high temperature.
- Intermittent gear slippage under load: If the locating pins or fixing plates in this kit fatigue, the HOUSING REAR PART may shift slightly, causing misalignment of the planetary gear sets and momentary power loss.
- Abnormal vibration during shifting: Loose fasteners in the 4657.183.185 set allow the HOUSING REAR SECTION to resonate, transmitting harsh vibrations through the driveline during gear changes.
- Increased metallic debris in oil pan: Gradual fretting wear from loose housing interfaces generates fine metal particles, often mistaken for bearing failure.
Technical Specifications
| Parameter | Specification |
|---|---|
| OEM Part Number | 4657.183.185 |
| Kit Contents | Loose hardware, locating pins, fixing plates, cap screws |
| Material | Case-hardened steel (pins) / High-tensile alloy steel (fasteners) |
| Weight (kit) | 0.85 kg (1.87 lbs) |
| Surface Finish | Zinc-plated (corrosion resistant) |
| OEM Reference | ZF 4657.183.185 |
| Compatible Housing | TRANSMISSION HOUSING |
Compatibility
This LOOSE PARTS kit is engineered for the ZF WG 210 Series transmission family. Based on its structural role, it is also compatible with the following ZF models that share the same housing architecture: WG180, WG200, WG210, and WG250. The 4657.183.185 kit is required whenever the transmission is disassembled for clutch pack replacement or housing seal renewal. Always verify that the HOUS.FRONT SECT and HOUSING REAR PART are inspected for wear before installing this kit.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101080 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4657201167 | HOUS.FRONT SECT | Front section housing for input shaft |
| 4657201171 | HOUSING REAR PART | Rear housing section for output assembly |
| 4657298103 | HOUSING REAR SECTION | Extended rear housing for PTO mounting |
| 0631306816 | CYLINDRICAL PIN | Precision alignment pin for housing doweling |
| 0636100801 | CAP SCREW | M10 high-torque fastener for housing joints |
| 4656301148 | FIXING PLATE | Locking plate for bearing retention |
| 4657301034 | SCREEN SHEET | Fine mesh filter for oil circuit |
| 4657301035 | SCREEN SHEET | Coarse mesh pre-filter for sump |
| 0636100803 | CAP SCREW | M12 cap screw for rear housing flange |
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