Overview
The ZF 4644.183.041 LOOSE PARTS kit is a critical service component designed specifically for the WG 200 series powershift transmission. This OEM genuine assembly contains the internal fasteners, seals, and small hardware elements that secure the clutch pack and planetary gear set within the transmission housing. Without this kit, the internal components cannot maintain proper alignment under high torque loads. The SKU 4644.183.041 is the exact factory-specified loose parts set, ensuring that every bolt, washer, and retaining ring meets ZF’s original dimensional tolerances. This part sits directly inside the main transmission casing, interfacing with the 4644101249: TRANSMISSION HOUSING and the 4644301402: TRANSMISSION HOUSING to create a sealed, vibration-resistant assembly.
Symptoms of Failure
When the 4644.183.041 LOOSE PARTS begin to degrade, operators will notice distinct operational issues. Oil leaks at the housing seam are the most common early indicator, as the included seals and gaskets lose their compression. Gear slipping under load occurs when retaining hardware loosens, allowing clutch packs to shift out of position. Abnormal metallic rattling from the bell housing signals that fasteners have backed out, risking internal damage. Erratic shift timing may also develop, as loose parts cause hydraulic pressure fluctuations within the valve body circuit.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4644.183.041 |
| OEM Reference | ZF 4644.183.041 |
| Material Composition | Steel fasteners, nitrile rubber seals, zinc-plated washers |
| Weight (approx.) | 0.45 kg (1.0 lb) |
| Dimensions (packaged) | 150 x 100 x 40 mm |
| Operating Temperature Range | -40°C to +120°C |
| Torque Specification | Per ZF service manual (varies by bolt size) |
Compatibility
This loose parts kit is engineered for the WG 200 series transmission family, including the WG180, WG200, and WG210 variants. It is also compatible with select ZF off-highway transmissions that share the same housing architecture, such as the 4WG200 and 5WG200 models. The kit directly replaces worn hardware in the main case, requiring simultaneous replacement of the 0634306323: O-RING and the 4644301298: COVER PLATE to ensure a complete seal. Always verify your transmission serial number against ZF’s application guide before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644101249 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4644301402 | TRANSMISSION HOUSING | Secondary housing section for clutch packs |
| 4644301298 | COVER PLATE | Seals the access port on the housing |
| 0634306323 | O-RING | Hydraulic seal between housing sections |
| 0636305026 | SCREW PLUG | Seals oil drain/fill ports |
| 4644301279 | SCREEN SHEET | Filters debris from hydraulic fluid |
| 4644301088 | SEALING CAP | Protects exposed shaft ends |
| 4644298503 | REPAIR KIT | Complete overhaul gasket and seal set |
| 4644309001 | OUTPUT FLANGE | Connects transmission to driveshaft |
| 4475280079 | SCREW PLUG | Magnetic drain plug for debris collection |
