Overview
The ZF 4644.152.497 CLUTCH is a critical torque-transfer component engineered specifically for the WG 180 and WG 200 series transmissions. This OEM genuine part sits within the planetary gear set assembly, where it engages and disengages power flow between the engine and the drivetrain. Designed to withstand high cyclic loads and thermal stress, the SKU 4644.152.497 ensures precise hydraulic actuation and minimal drag during shift events. When paired with a robust 4644101223: TRANSMISSION HOUSING or the 4644301225: TRANSMISSION HOUSING, this clutch delivers reliable performance in heavy-duty industrial applications.
Symptoms of Failure
- Erratic gear engagement or slipping under load: A worn 4644.152.497 clutch often fails to maintain hydraulic pressure, causing the transmission to slip during acceleration or uphill operation.
- Delayed or harsh shifting: When the clutch disc or piston seals degrade, you may notice a pronounced lag between gear changes or a jarring engagement.
- Contaminated transmission fluid with metallic debris: Friction material shedding from the clutch pack introduces fine metal particles into the oil, often visible during routine fluid checks.
- Overheating in the WG 180/200 sump: Slipping clutches generate excessive heat, leading to elevated oil temperatures and potential damage to adjacent components like the 0730365125: TYPE PLATE.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4644.152.497 |
| OEM Reference | ZF 4644.152.497 |
| Material | Sintered steel friction plates with carbon composite lining |
| Weight | 2.8 kg (6.2 lbs) |
| Outer Diameter | 180 mm |
| Inner Diameter | 120 mm |
| Plate Thickness | 2.5 mm per disc |
| Operating Pressure | 12–16 bar |
| Temperature Range | -20°C to +120°C |
Compatibility
This clutch is engineered for the ZF WG 180 and WG 200 series transmissions, commonly found in construction machinery, agricultural tractors, and material handling equipment. It is a direct replacement for the original clutch pack in the forward/reverse planetary unit. While primarily designed for WG 180 models, it also fits select WG 200 variants with identical spline counts and piston bores. For proper sealing, always install a new 0634306525: O-RING and 0636305026: SCREW PLUG during reassembly. The 4644301298: COVER PLATE must also be inspected for warpage to ensure correct clutch pack clearance.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644101223 | TRANSMISSION HOUSING | Encloses and supports gear train and clutch assembly |
| 4644301225 | TRANSMISSION HOUSING | Alternate housing variant for WG 200 series |
| 0730365125 | TYPE PLATE | Identification plate for transmission model and serial number |
| 4644301298 | COVER PLATE | Seals clutch pack access port and maintains hydraulic pressure |
| 0634306525 | O-RING | Provides hydraulic seal between clutch piston and housing |
| 0636305026 | SCREW PLUG | Seals oil passages in the clutch drum |
| 4644301279 | SCREEN SHEET | Filters debris from clutch cooling oil flow |
| 4644301088 | SEALING CAP | Prevents oil leakage from clutch piston bore |
| 4644106201 | SHIFT SYSTEM | Hydraulic control unit for clutch engagement timing |
| 4644306470 | GASKET | Seals mating surfaces between clutch housing and cover |
