Overview
The ZF 4644.183.052 LOOSE PARTS kit is a critical service component designed specifically for the WG 201 series transmission. This assembly contains the necessary fasteners, seals, and positioning elements required to secure internal components within the planetary gear set and clutch housing. As an OEM genuine part, SKU 4644.183.052 ensures precise fitment and load distribution during transmission rebuilds or major repairs. It is typically installed during the reassembly phase after inspecting or replacing the 4644101160: TRANSMISSION HOUSING and the 4644301323: TRANSMISSION HOUSING.
Symptoms of Failure
When the loose parts in this kit degrade or are improperly torqued, operators may notice specific failure modes. Look for these warning signs:
- Transmission housing oil seepage: Worn gaskets or loose fasteners from this kit can cause fluid to weep around the main case joints, especially after thermal cycling.
- Gear engagement hesitation or slipping: If the 4644301189: THREADED BUSH becomes loose, it can alter clutch pack clearance, leading to delayed shifts under load.
- Abnormal metallic rattling from the bell housing: Missing or fatigued retaining elements allow small components to vibrate against the housing, producing a distinct noise during idle.
- Oil contamination from loose debris: Broken set screws or plugs can shed metal particles into the hydraulic circuit, accelerating wear on valve bodies.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4644.183.052 |
| OEM Reference | ZF 4644.183.052 |
| Material Composition | Steel alloy with zinc-nickel plating (fasteners); NBR rubber (seals) |
| Total Kit Weight | 0.85 kg (1.87 lbs) |
| Thread Pitch (primary bolts) | M10 x 1.5 |
| Operating Temperature Range | -40°C to +120°C |
| Torque Specification | 45 Nm ± 5 Nm (housing bolts) |
Compatibility
This loose parts kit is engineered for the ZF WG 201 series, but it also cross-applies to several other ZF powershift transmissions that share the same modular architecture. Compatible models include the WG 180, WG 200, and WG 210 series. The kit is also suitable for certain variants of the WG 120 and WG 150 when used with the appropriate 4475280043: SCREW PLUG for port sealing. Always verify your transmission serial number against the ZF parts catalog to confirm exact fitment, as housing casting revisions may require specific fastener lengths.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644101160 | TRANSMISSION HOUSING | Main structural casing for gear and clutch assembly |
| 4644301323 | TRANSMISSION HOUSING | Rear housing section for output shaft support |
| 4644301189 | THREADED BUSH | Provides wear-resistant thread for clutch pack adjustment |
| 4475280043 | SCREW PLUG | Seals hydraulic test ports and oil passages |
| 0634306198 | O-RING | Creates static seal between housing halves |
| 0730365067 | TYPE PLATE | Identification plate with transmission serial number |
| 4644301161 | COVER PLATE | Protects clutch access opening from debris |
| 0636100621 | HEXAGON SCREW | Secures cover plate and PTO adapters |
| 0631610020 | SET SCREW | Locks threaded bush in position after adjustment |
| 0501218540 | BREATHER | Equalizes internal pressure and prevents moisture ingress |
