Overview
The ZF 0501.340.899 THRUST WASHER is a precision-engineered OEM genuine component designed for the WG 94 series of powershift transmissions. This hardened steel washer sits between rotating and stationary gear sets, specifically within the planetary gear assembly, to manage axial loads and maintain critical clearances. As a thrust washer, it prevents metal-on-metal contact between the gear faces and the transmission housing, ensuring smooth torque transfer. The SKU 0501.340.899 is a direct factory replacement, guaranteeing exact fitment and material hardness for long service life. When paired with a new 4661103010: OUTPUT assembly, this washer helps maintain proper end-play tolerances in the drivetrain.
Symptoms of Failure
When the 0501.340.899 thrust washer wears beyond specification, operators will notice distinct performance issues. Look for these specific failure symptoms:
- Axial play or clunking in the driveline – Excessive end float in the output shaft causes a noticeable thud when shifting from forward to reverse.
- Metallic debris in transmission fluid – Worn washer material contaminates the oil, often visible on the 4661372031: SCREEN SHEET during routine maintenance.
- Gear slipping under load – Reduced clamping force from worn thrust surfaces allows planetary gears to lose engagement during heavy pulling.
- Overheating at the output shaft area – Friction from a degraded washer generates excess heat, potentially damaging the 4661303004: OUTPUT SHAFT.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0501.340.899 |
| Material | Case-hardened steel (DIN 1.7131) |
| Outer Diameter | 89.0 mm |
| Inner Diameter | 65.5 mm |
| Thickness | 2.5 mm |
| Weight | 0.08 kg |
| OEM Reference | ZF 0501.340.899 |
| Surface Finish | Ground, Ra ≤ 0.8 µm |
Compatibility
This thrust washer is specifically engineered for the WG 94 series of ZF powershift transmissions. Based on its dimensions and application, it is compatible with the following models: WG94, WG180, WG200, and WG250. It is a critical component in the output planetary set, where it works in conjunction with the 4661201204: TAPER ROLLER BEARING and the 4661201206: TAPERED ROLLER BEARING to support radial and axial loads. Always verify your transmission serial number before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4661103010 | OUTPUT | Transfers torque from planetary gears to driveline |
| 4661303004 | OUTPUT SHAFT | Main rotating shaft in the output assembly |
| 4661201204 | TAPER ROLLER BEARING | Supports radial and axial loads on output shaft |
| 4661201206 | TAPERED ROLLER BEARING | Secondary bearing for high-load output applications |
| 4661372031 | SCREEN SHEET | Filters debris from transmission fluid |
| 4661103800 | OUTPUT | Alternate output component for specific gear ratios |
| 4642303059 | INPUT FLANGE | Connects transmission to engine flywheel |
| 0750111307 | SHAFT SEAL | Prevents oil leakage at shaft exit points |
| 0634306328 | O-RING | Seals hydraulic passages within the valve body |
| 4660303022 | WASHER | Standard flat washer for general spacing |
