Overview
The ZF 4644.151.044 CLUTCH is a critical torque-transfer component engineered specifically for the WG 180 and WG 200 transmission series. Positioned within the planetary gear set assembly, this OEM genuine part manages the engagement and disengagement of power flow between the engine and the drivetrain. The SKU 4644.151.044 ensures precise hydraulic actuation, enabling smooth gear shifts under heavy industrial loads. When installed alongside the 4644101208: TRANSMISSION HOUSING, this clutch maintains structural alignment and oil circulation integrity within the transmission casing.
Symptoms of Failure
- Delayed or harsh gear engagement – A worn 4644.151.044 clutch often causes noticeable lag when shifting from neutral to drive, or produces a jarring engagement under load.
- Torque loss during acceleration – Slipping of the clutch pack leads to a sudden drop in power transmission, especially when climbing grades or towing heavy equipment.
- Contaminated transmission fluid – Friction material degradation from the clutch releases debris into the oil, visible as dark, metallic particles during fluid changes.
- Overheating in the WG 180 housing – Excessive slippage generates abnormal heat, often detected by a burnt smell or elevated temperature readings near the 4644301333: HOUSING.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number (SKU) | 4644.151.044 |
| OEM Reference | ZF 4644.151.044 |
| Material | Sintered steel friction discs with high-carbon steel separator plates |
| Weight | 2.85 kg (6.28 lbs) |
| Outer Diameter | 180 mm |
| Inner Diameter | 120 mm |
| Friction Surface Count | 6 discs |
| Operating Pressure | 12–16 bar |
Compatibility
This clutch is designed for the ZF WG 180 and WG 200 series powershift transmissions. It directly replaces the original clutch pack in models including WG 180, WG 200, and their sub-variants (WG 180-2, WG 200-4). The part also integrates with the 0730365125: TYPE PLATE for correct identification and the 0631311009: GROOVED STUD for secure mounting within the clutch drum assembly. Always verify your transmission serial number against the type plate before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644101208 | TRANSMISSION HOUSING | Encloses and aligns the clutch assembly within the gear train |
| 4644301333 | HOUSING | Provides structural support for the clutch piston and oil channels |
| 0730365125 | TYPE PLATE | Identifies transmission model and part compatibility |
| 0631311009 | GROOVED STUD | Secures clutch pack alignment within the drum |
| 0636305019 | SCREW PLUG | Seals hydraulic passages in the clutch circuit |
| 4644301247 | THREADED BUSH | Provides wear-resistant mounting point for clutch components |
| 0634303485 | O-RING | Prevents fluid leakage between clutch piston and housing |
| 4644301257 | ADAPTER | Connects clutch oil feed to the transmission valve body |
| 0634306023 | O-RING | Seals the adapter-to-housing interface |
| 4644106231 | SHIFT SYSTEM | Controls hydraulic pressure to engage the clutch pack |
