Overview
The ZF 2093.122.411 PUMP DRIVE is a critical hydraulic component engineered for the WG100, WG130, and WG131 transmission series. This OEM genuine part transfers rotational power from the transmission gear train to the hydraulic pump, ensuring consistent oil flow for clutch actuation and lubrication. The SKU 2093.122.411 mounts directly onto the 2093101025: HOUSING, forming the primary interface between mechanical and hydraulic systems. Without this drive, the transmission cannot maintain hydraulic pressure, making it essential for load-holding and shift quality in industrial vehicles.
Symptoms of Failure
- Intermittent hydraulic pressure loss during operation: A worn pump drive gear or spline causes erratic pump engagement, leading to delayed clutch response or unexpected gear slippage under load.
- Visible oil seepage around the pump mounting flange: Degraded seals or bearing wear in the 2093.122.411 unit allows transmission fluid to escape, often pooling near the 2093301031: TRANSMISSION HOUSING joint.
- Whining or grinding noise from the pump area: Worn drive shaft bearings or misaligned gears produce metallic sounds that intensify as hydraulic demand increases.
- Erratic shift timing or harsh engagements: Insufficient pump speed due to drive slippage results in inconsistent hydraulic pressure, causing rough or delayed gear changes.
Technical Specifications
| Part Number | 2093.122.411 |
| OEM Reference | ZF 2093.122.411 |
| Material | Case-hardened steel with nitrided gear teeth |
| Weight | 2.8 kg (6.2 lbs) |
| Overall Length | 145 mm |
| Drive Spline | 14-tooth, 30° pressure angle |
| Max Torque Capacity | 180 Nm |
| Seal Type | Double-lipped PTFE |
Compatibility
This pump drive is specifically designed for ZF WG-series powershift transmissions. Verified compatibility includes WG100, WG130, and WG131 models used in forklifts, wheel loaders, and telehandlers. It also fits select WG180 and WG200 variants when paired with the correct 2093301021: GASKET and 0636015073: HEXAGON SCREW kit. Always verify the 0730365092: TYPE PLATE on your transmission housing to confirm exact model fitment before installation.
Frequently Asked Questions
Q: Can I install the 2093.122.411 without replacing the housing?
A: Yes, but inspect the 2093101025: HOUSING for cracks or wear at the mounting face. A damaged housing will cause premature pump drive failure.
Q: What torque should I use for the mounting screws?
A: Use 45 Nm for the 4475280013: SCREW PLUG and 25 Nm for the 0636101026: CAP SCREW fasteners. Always replace the 0634314235: O-RING during reassembly.
Q: How do I know if the pump drive spline is worn?
A: Remove the 2093301033: COVER and inspect for galling or step wear on the spline teeth. A worn spline will cause the 0501337897: SPEED SENSOR to report erratic RPM values.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 2093101025 | HOUSING | Encloses pump drive and supports gear alignment |
| 2093301031 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 0730365092 | TYPE PLATE | Identification tag for transmission model |
| 4475280013 | SCREW PLUG | Seals hydraulic port against leakage |
| 2093301021 | GASKET | Prevents oil seepage at housing joints |
| 2093301033 | COVER | Protects pump drive from debris |
| 0636015073 | HEXAGON SCREW | Fastens pump drive to housing |
| 0634314235 | O-RING | Seals pump drive shaft bore |
| 0501337897 | SPEED SENSOR | Monitors pump drive rotation speed |
| 0636101026 | CAP SCREW | Secures cover plate over pump drive |
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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