Overview
The ZF 0501.316.494 BEARING BUSH is a precision-engineered component designed to support rotating shafts within the hydraulic pump drive and countershaft assemblies of ZF WG-series transmissions. This OEM genuine part, identified by SKU 0501.316.494, acts as a sacrificial liner that reduces friction between the shaft and the TRANSMISSION HOUSING. By maintaining correct radial clearance, it ensures consistent oil film distribution and prevents metal-to-metal contact under high torque loads. The bushing is press-fitted into the housing bore and directly interacts with the PERIPHERALS assembly, which governs auxiliary power take-off functions.
Symptoms of Failure
- Low hydraulic pressure and gear slipping – Worn clearance causes oil bypass, reducing clutch pack engagement force. Operators often report “transmission slipping under load” or “delayed engagement in forward gears.”
- Metallic debris in the oil pan – Flaking bearing material contaminates the fluid, leading to “shiny particles on the dipstick” or “magnetic plug covered in steel filings.”
- Whining or grinding noise from the bell housing – As the bushing wall thins, shaft oscillation produces a distinct “howling sound during acceleration” that intensifies with RPM.
- Oil seepage around the PTO cover – Excessive radial play distorts the seal lip, causing “wet spots near the range selector” or “dripping from the housing joint.”
Technical Specifications
| Parameter | Value |
|---|---|
| Inner Diameter | 45.00 mm |
| Outer Diameter | 55.00 mm |
| Length | 30.00 mm |
| Material | Steel-backed sintered bronze (PTFE overlay) |
| Weight | 0.12 kg |
| OEM Reference | 0501.316.494 |
| Hardness | HRB 75-85 |
| Max Operating Temp | 150°C |
Compatibility
This bearing bush is engineered for the ZF WG200, WG92, and WG98 transmission families. It is a direct fit for the WG180, WG200, WG92, and WG98 series, where it supports the input shaft within the HOUSING. The part is also used in the WG200 PTO drive cluster, which interfaces with the RANGE SELECTOR mechanism. Always verify the bushing bore condition in the housing before installation to avoid premature wear.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4660198001 | PERIPHERALS | Controls auxiliary power take-off and pump drive |
| 0501209818 | RANGE SELECTOR | Manages high/low gear range engagement |
| 4660101011 | TRANSMISSION HOUSING | Main structural casing containing all rotating assemblies |
| 4660301018 | HOUSING | Rear housing section supporting output shaft bearings |
| 0631306174 | CYLINDRICAL PIN | Aligns housing halves during assembly |
| 0769123894 | TYPE PLATE | Identification tag with transmission serial number |
| 4660221012 | SUCTION TUBE | Draws oil from the pan to the pump inlet |
| 0634100317 | O-RING | Seals the suction tube connection to the pump |
| 0636103273 | CAP SCREW | Fastens the PTO cover to the housing |
| 0750100022 | SCREW PLUG | Closes oil gallery access ports |
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