Overview
The ZF 4616.303.174 BUSH is a precision-engineered bearing component designed for the WG65 series of off-highway transmissions. This OEM genuine part functions as a sacrificial wear surface within the planetary gear set, reducing friction between rotating shafts and stationary housings. Installed specifically in the clutch drum or reaction hub assembly, the 4616.303.174 ensures consistent oil film distribution under high-torque conditions. As a critical wear item, this bushing directly supports the 4616105417: VALVE by maintaining proper hydraulic pressure alignment within the valve body circuit.
Symptoms of Failure
- Erratic shift timing or delayed engagement – A worn 4616.303.174 bushing allows excessive shaft play, disrupting oil flow to the 0501319251: SOLENOID VALVE, causing inconsistent clutch pack pressurization.
- Metallic debris in transmission fluid – Flaking bronze or steel particles from the degraded bushing surface contaminate the hydraulic circuit, often clogging the 0636302013: SCREW PLUG passages.
- Low line pressure at idle – Internal leakage past the worn bushing reduces pump output, requiring replacement of the 0634801038: SEALING RING alongside the bushing to restore sealing integrity.
- Audible whining or knocking from transmission housing – Radial clearance exceeding 0.15mm creates metal-on-metal contact during load shifts, accelerating wear on adjacent planetary components.
Technical Specifications
| Parameter | Value |
|---|---|
| Inner Diameter | 38.10 mm (1.500 in) |
| Outer Diameter | 44.45 mm (1.750 in) |
| Length | 25.40 mm (1.000 in) |
| Material | Phosphor bronze (SAE 841) |
| Weight | 0.045 kg (0.099 lb) |
| OEM Reference | ZF 4616.303.174 |
| Hardness | HRB 60-80 |
Compatibility
This bushing is engineered for the ZF WG65 transmission series, which includes the WG65, WG80, WG100, WG120, WG150, WG180, and WG200 models. It is also compatible with the ZF 4WG-65 and 5WG-65 variants used in construction loaders and agricultural tractors. Always verify fitment by cross-referencing the 4616.303.174 part number against your transmission’s serial number plate.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616105417 | VALVE | Controls hydraulic flow to clutch packs |
| 0501319251 | SOLENOID VALVE | Electro-hydraulic shift actuation |
| 0636302013 | SCREW PLUG | Seals oil gallery access ports |
| 0634801038 | SEALING RING | Prevents fluid bypass at bushing bore |
| 4616305078 | CONSOLE | Mounting bracket for valve body assembly |
| 0636010047 | HEXAGON SCREW | Secures console to transmission case |
| 0636101020 | CAP SCREW | Fastens solenoid valve to manifold |
| 0630001010 | WASHER | Distributes load under cap screw head |
| 0637006015 | HEXAGON NUT | Locks screw plug in position |
| 0637842523 | SCREW-IN SLEEVE | Provides threaded insert for wear-prone bores |
Authorized ZF Distributor
We are a certified supplier of genuine ZF components.
