Overview
The ZF 4644.153.472 CLUTCH is a critical torque-transfer component engineered specifically for the WG 180 and WG 200 series transmissions. Positioned within the planetary gear set assembly, this OEM genuine part manages the engagement and disengagement of power flow between the input shaft and the output drive. The SKU 4644.153.472 is precision-machined to ZF’s exacting tolerances, ensuring seamless hydraulic actuation and minimal frictional losses during heavy-duty industrial operations. This clutch assembly works in concert with the 4460115043: HOUSING to contain hydraulic pressure, while the 4469315012: AXLE DRIVE HOUSING provides structural support for the rotating assembly. Without this clutch, the transmission cannot achieve proper gear ratio changes under load.
Symptoms of Failure
- Delayed engagement or gear slipping under load: When the 4644.153.472 clutch wears, hydraulic pressure bleeds past the friction plates, causing the transmission to hesitate before engaging or to slip during acceleration. This is often described as “WG200 transmission clutch slipping” in service logs.
- Erratic shift timing and harsh engagements: Worn clutch plates create inconsistent friction coefficients, leading to abrupt or delayed shifts. Operators may notice a “ZF WG180 hard shift” condition, particularly when transitioning between forward and reverse.
- Metallic debris in transmission fluid: As the clutch material degrades, fine metallic particles contaminate the hydraulic circuit. This symptom frequently appears alongside a failing 0750117406: TAPER ROLLER BEARING, which can shed additional debris into the oil pan.
- Overheating transmission with burnt fluid odor: Slipping clutches generate excessive heat, breaking down the transmission fluid and producing a distinct burnt smell. This is a common complaint in high-torque applications like concrete mixers or refuse trucks.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4644.153.472 |
| OEM Reference | ZF 4644.153.472 |
| Material | Sintered bronze friction plates with steel separator discs |
| Outer Diameter | 180 mm (estimated) |
| Inner Diameter | 120 mm (estimated) |
| Total Thickness | 32 mm (assembled) |
| Weight | 1.8 kg (4.0 lbs) |
| Hydraulic Pressure Range | 8–12 bar |
| Operating Temperature | -20°C to +120°C |
Compatibility
This clutch assembly is designed for ZF WG 180 and WG 200 series transmissions, which are commonly found in off-highway vehicles, agricultural tractors, and construction equipment. The 4644.153.472 part is also compatible with select WG 160 variants that share the same clutch pack configuration. When replacing this clutch, technicians should inspect the 0750117802: TAPERED ROLLER BEARING for wear, as both components experience similar load cycles. The clutch interfaces directly with the 4460115043: HOUSING and the 4469315012: AXLE DRIVE HOUSING to form the complete clutch pack assembly.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4460115043 | HOUSING | Encloses and aligns the clutch pack assembly |
| 4469315012 | AXLE DRIVE HOUSING | Supports output shaft and differential components |
| 0750117406 | TAPER ROLLER BEARING | Supports radial and axial loads on the input shaft |
| 0750117802 | TAPERED ROLLER BEARING | Handles thrust loads from the planetary gear set |
| 0734319337 | SHAFT SEAL | Prevents fluid leakage at the clutch piston bore |
| 0730161317 | WASHER | Spacing and load distribution for clutch pack |
| 0730161451 | WASHER | Thrust washer for clutch hub alignment |
| 0730161452 | WASHER | Steel spacer for clutch pack preload |
| 0730161453 | WASHER | Selective fit washer for end play adjustment |
| 0730161340 | WASHER | Hardened washer for bearing support surface |
