Overview
The ZF 4644.153.224 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 input shaft and the output drive. The SKU 4644.153.224 ensures precise hydraulic actuation and positive lock-up under heavy industrial loads. When installed alongside the 4644101223 TRANSMISSION HOUSING and the 4644301225 TRANSMISSION HOUSING, this clutch maintains the structural integrity required for continuous-duty applications in construction and material handling equipment.
Symptoms of Failure
- Delayed engagement or gear slipping under load – When the 4644.153.224 clutch disc friction material wears thin, the transmission fails to hold torque, causing hesitation during acceleration or complete loss of drive in forward or reverse.
- Low hydraulic pressure and erratic shifting – Internal seal degradation within this clutch pack leads to pressure drops, resulting in harsh or delayed shifts that worsen as operating temperature rises.
- Metallic grinding noise from the bell housing area – Worn splines or fractured clutch plates produce a distinct grinding sound, particularly during gear changes, indicating imminent catastrophic failure.
- Transmission fluid contamination with dark debris – Friction material shedding from the 4644.153.224 clutch turns the oil a dark gray or black color, often accompanied by visible metal particles in the filter or pan.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4644.153.224 |
| OEM Reference | ZF 4644.153.224 |
| Material | Sintered bronze friction lining on steel core |
| Outer Diameter | 224 mm (8.82 in) |
| Inner Diameter | 153 mm (6.02 in) |
| Thickness | 4.5 mm (0.177 in) |
| Weight | 0.85 kg (1.87 lbs) |
| Torque Capacity | 1,200 Nm (885 lb-ft) |
| Operating Temperature Range | -20°C to +120°C (-4°F to +248°F) |
Compatibility
This clutch is designed for ZF WG 180 and WG 200 series transmissions used in forklifts, wheel loaders, and telehandlers. It directly replaces the original equipment clutch pack in the forward/reverse clutch drum assembly. The 4644.153.224 is also compatible with select WG 160 variants when used with the correct 0730365125 TYPE PLATE for identification. For proper sealing during installation, pair this clutch with the 4644301298 COVER PLATE to prevent fluid bypass and ensure correct axial clearance.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644101223 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4644301225 | TRANSMISSION HOUSING | Secondary housing section for clutch pack |
| 0730365125 | TYPE PLATE | Identification tag for transmission model |
| 4644301298 | COVER PLATE | Seals clutch drum assembly |
| 0634306525 | O-RING | Hydraulic seal between clutch piston and drum |
| 0636305026 | SCREW PLUG | Closes oil passages during service |
| 4644301279 | SCREEN SHEET | Filters debris from clutch feed oil |
| 4644301088 | SEALING CAP | Prevents contamination of clutch ports |
| 4644106300 | SHIFT SYSTEM | Hydraulic valve body for clutch control |
| 4644306500 | COVER PLATE | Access cover for shift system inspection |
