Overview
The ZF 2093.122.042 PUMP DRIVE is a critical hydraulic component engineered specifically for the WG100, WG130, and WG131 transmission series. This OEM genuine part serves as the primary interface between the transmission’s power take-off (PTO) and the hydraulic pump, ensuring consistent oil flow for clutch actuation and lubrication circuits. The SKU 2093.122.042 sits directly on the transmission housing, transferring rotational torque from the gear train to the pump shaft. When paired with a properly maintained 2093109024: DIFFERENTIAL, this pump drive maintains precise hydraulic pressure for smooth gear engagement in heavy-duty industrial applications.
Symptoms of Failure
- Hydraulic pressure drop during cold starts: A worn pump drive gear set causes insufficient oil volume, leading to delayed clutch engagement in WG100 transmissions.
- Whining noise from the transmission pump area: Damaged splines or bearing surfaces on the 2093.122.042 produce a high-pitched metallic sound under load, often mistaken for a failing 0750117075: TAPER ROLLER BEARING.
- External oil seepage near the pump mounting flange: Cracks or seal wear on the pump drive housing allow ATF to escape, leaving visible drips on the transmission bell housing.
- Intermittent loss of hydraulic function in WG130/WG131 units: Slipping pump drive teeth cause erratic pressure spikes, triggering warning lights on industrial equipment dashboards.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 2093.122.042 |
| Material | Case-hardened alloy steel (16MnCr5) |
| Weight | 2.85 kg (6.28 lbs) |
| Input Spline Count | 14-tooth, 30° pressure angle |
| Output Shaft Diameter | 25.4 mm (1.0 in) |
| Max Operating Pressure | 25 bar (362 psi) |
| OEM Reference | ZF 2093.122.042 |
Compatibility
This pump drive is engineered for ZF’s WG-series powershift transmissions, specifically the WG100, WG130, and WG131 models used in forklifts, telehandlers, and construction loaders. It also fits select WG180 and WG200 variants when used with the correct 2093309071: DIFF.HOUSING adapter. For dual-pump configurations, the 2093.122.042 works alongside the 2093209095: DIFFERENTIAL to balance hydraulic flow. Always verify the pump drive’s spline engagement with your transmission’s PTO shaft before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 2093109024 | DIFFERENTIAL | Distributes torque between drive axles |
| 0750117075 | TAPER ROLLER BEARING | Supports rotating shafts in the differential housing |
| 2093209095 | DIFFERENTIAL | Secondary torque distribution unit for WG130 |
| 2093309071 | DIFF.HOUSING | Encloses differential gear assembly |
| 0631100223 | SPRING PIN | Secures pump drive gear to shaft |
| 0730300820 | THRUST WASHER | Reduces axial play in pump drive assembly |
| 4482360002 | AXLE BEVEL GEAR | Transfers power to wheel hubs |
| 2097309085 | DIFFERENTIAL AXLE | Connects differential to final drive |
| 5838300811 | THRUST WASHER | Prevents gear end-play in differential |
| 4482360001 | DIFFERENTIAL BEVEL GEAR | Primary gear set for torque splitting |
Frequently Asked Questions
Q: Can the 2093.122.042 pump drive be used in a WG180 transmission without modification?
A: The WG180 requires a different pump drive spline profile. You must verify the input shaft count matches your transmission’s PTO. For WG180 applications, consider pairing this part with the 2093309071: DIFF.HOUSING adapter kit.
Q: What causes premature wear on this pump drive?
A: Contaminated hydraulic fluid is the primary culprit. Debris accelerates spline wear and damages the 0750117075: TAPER ROLLER BEARING that supports the pump drive shaft. Always replace the fluid filter when installing a new pump drive.
Q: Is the 2093.122.042 compatible with dual-pump hydraulic systems?
A: Yes, but only when used with the 2093209095: DIFFERENTIAL to split torque between two pumps. Without this differential, the pump drive may overload and fail within 500 operating hours.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
Request a Quote →
