Overview
The ZF 0501.006.336 PUMP is a critical hydraulic component engineered for the WG100, WG130, and WG131 transmission series. This OEM genuine part serves as the primary fluid mover, generating the necessary oil pressure to actuate clutch packs, lubricate gears, and cool internal assemblies. Positioned within the transmission’s valve body housing, the pump draws fluid from the sump and delivers it under precise pressure to ensure smooth power transfer. The SKU 0501.006.336 is a direct replacement unit, machined to exact ZF tolerances for reliable flow rates. When this pump degrades, it can compromise the entire hydraulic circuit, often necessitating simultaneous inspection of the 5838109009: DIFFERENTIAL and the 2093209023: DIFFERENTIAL to ensure drivetrain integrity.
Symptoms of Failure
- Delayed or harsh gear engagement: A worn 0501.006.336 pump fails to build adequate hydraulic pressure, causing noticeable lag when shifting from neutral to drive or reverse. This is a common long-tail search query for “ZF transmission slow engagement fix.”
- Intermittent transmission slipping under load: As the pump loses volumetric efficiency, the clutch packs receive insufficient clamping force, leading to RPM flare during acceleration. Operators often search for “WG130 slipping under load causes.”
- Low hydraulic pressure warnings or erratic operation: A failing pump produces inconsistent oil flow, triggering dashboard alerts or erratic shifting patterns. This symptom is frequently paired with “ZF WG100 pump pressure loss.”
- Visible oil leaks near the pump housing: Seal wear on the pump shaft or housing gasket can result in external fluid seepage, often mistaken for pan gasket failures. This aligns with queries like “ZF transmission pump leak repair.”
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 0501.006.336 |
| OEM Reference | ZF 0501.006.336 |
| Material | High-strength aluminum alloy with hardened steel gears |
| Weight | 2.4 kg (5.3 lbs) |
| Overall Dimensions | 180 mm x 120 mm x 95 mm |
| Flow Rate (nominal) | 18 L/min at 1500 RPM |
| Max Operating Pressure | 22 bar (319 psi) |
| Seal Type | Viton dual-lip shaft seal |
Compatibility
This pump is specifically designed for ZF WG-series powershift transmissions. Verified compatibility includes the WG100, WG130, and WG131 models commonly found in agricultural tractors, construction loaders, and industrial material handlers. While the 0501.006.336 is not used in the WG180 or WG200 series due to different mounting flanges, it shares hydraulic architecture with those larger units. For complete drivetrain restoration, pairing this pump with a new 5838300626: DIFFERENTIAL HOUSING and inspecting the 0750117075: TAPER ROLLER BEARING is recommended to prevent premature wear on replacement components.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 5838109009 | DIFFERENTIAL | Distributes torque to drive axles |
| 0750117075 | TAPER ROLLER BEARING | Supports rotating shaft loads |
| 2093209023 | DIFFERENTIAL | Secondary torque distribution unit |
| 5838300626 | DIFFERENTIAL HOUSING | Encloses differential gear set |
| 0631329088 | SPRING PIN | Secures pump alignment dowels |
| 5838300811 | THRUST WASHER | Reduces axial friction in gear train |
| 5838300721 | AXLE BEVEL GEAR | Transfers power to wheel hubs |
| 5838300633 | AXLE | Rotates with differential output |
| 5838300753 | THRUST WASHER | Controls side gear clearance |
| 5838300818 | THRUST WASHER | Adjusts pinion gear end play |
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