Overview
The ZF 4651.319.004 BUSH is a precision-engineered bearing component designed specifically for the WG 100 Series transmission family. This OEM genuine part serves as a critical wear surface within the planetary gear set, reducing friction between rotating shafts and stationary housings. Installed inside the 4651101005: TRANSMISSION HOUSING, this bushing maintains proper shaft alignment and load distribution during high-torque operations. The SKU 4651.319.004 is manufactured to ZF’s exacting tolerances, ensuring consistent oil film retention and minimal radial play throughout the transmission’s service life.
Symptoms of Failure
- Oil leaks around the transmission housing: A worn 4651.319.004 bushing can cause shaft wobble, leading to seal distortion and fluid seepage near the 4651301010: HOUSING interface.
- Gear slipping under load: Excessive bushing clearance reduces gear mesh precision, causing intermittent power loss during acceleration or hill climbs.
- Metallic grinding noises from the WG100: As the bushing material erodes, metal-to-metal contact between the shaft and 4651301017: HOUSING produces audible scraping sounds.
- Vibration in neutral or drive: Worn bushings fail to dampen torsional vibrations, transmitting harshness through the drivetrain.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4651.319.004 |
| Material | Phosphor bronze with PTFE lining |
| Inner Diameter | 38.10 mm (1.500 in) |
| Outer Diameter | 44.45 mm (1.750 in) |
| Length | 25.40 mm (1.000 in) |
| Weight | 0.045 kg (0.099 lbs) |
| OEM Reference | ZF 4651.319.004 |
| Hardness | HRB 85-95 |
Compatibility
This bushing is engineered for the ZF WG 100 Series, including models WG100, WG120, WG150, WG180, and WG200. It directly replaces the factory-installed bushing in the output shaft support bore. For complete assembly, pair this part with the 0634303928: O-RING to seal the bushing bore against contamination. Always verify transmission serial number against ZF’s parts catalog before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4651101005 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4651301010 | HOUSING | Intermediate support housing for shafts |
| 0634303928 | O-RING | Seals bushing bore against fluid leaks |
| 4651301017 | HOUSING | Rear housing for output shaft assembly |
| 4651203002 | SCREEN SHEET | Filters debris from hydraulic fluid |
| 4651303005 | SCREEN SHEET | Secondary filtration for valve body |
| 0636101032 | CAP SCREW | Fastens housing sections together |
| 0630361028 | SEALING CAP | Closes unused ports in housing |
| 0636304032 | SCREW PLUG | Seals drain/fill holes |
| 0634303312 | O-RING | Gasket for screw plug sealing |
