ZF 2093.122.033 PUMP DRIVE for WG100/WG130/WG131 | OEM Genuine Part

Overview

The ZF 2093.122.033 PUMP DRIVE is a critical hydraulic component engineered 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 fluid flow for clutch actuation and lubrication circuits. As a precision-machined drive gear, it transfers rotational energy directly from the transmission countershaft to the pump assembly. The SKU 2093.122.033 is manufactured to ZF’s exacting tolerances, guaranteeing a direct bolt-on replacement without modification. When paired with a properly maintained 2093109024: DIFFERENTIAL, this pump drive ensures synchronized power distribution across the driveline.

Symptoms of Failure

• Hydraulic pressure drop during gear engagement: A worn pump drive gear cannot maintain adequate pump RPM, causing delayed clutch pack engagement and erratic shifting behavior.
• Whining or grinding noise from the transmission pump area: Excessive backlash between the pump drive and its mating gear produces a distinct metallic sound, especially under load or at idle.
• Visible oil leaks near the PTO housing: A damaged pump drive shaft seal or worn gear teeth can allow transmission fluid to escape, leading to low oil levels and overheating.
• Intermittent loss of power to auxiliary hydraulics: If the pump drive slips, implements powered by the transmission’s hydraulic system (e.g., dump bodies or winches) may operate inconsistently.

Technical Specifications

Compatibility

This pump drive is specifically designed for ZF’s WG-series powershift transmissions, including the WG100, WG130, and WG131 models. It is also compatible with the WG180 and WG200 series when used in conjunction with the correct housing adapter. The part interfaces directly with the 0750117075: TAPER ROLLER BEARING to support axial loads, and it aligns with the 2093209095: DIFFERENTIAL assembly for torque distribution. For installations requiring a new housing, the 2093309071: DIFF.HOUSING provides the necessary structural support.

Related Components

Frequently Asked Questions

Q: Can the ZF 2093.122.033 pump drive be used in a WG180 transmission without modifications?
A: Yes, but only if the transmission is equipped with the correct pump drive housing adapter. The gear dimensions and spline count are identical across the WG100-WG200 series, but the housing depth varies. Always verify clearance with the 2093309071: DIFF.HOUSING before installation.

Q: How do I know if my pump drive gear is worn beyond tolerance?
A: Measure the gear tooth thickness at the pitch line. If it measures less than 4.2 mm (new is 4.8 mm), or if you detect more than 0.15 mm of backlash when meshed with the pump gear, replacement is required. A worn gear often accompanies a failing 0750117075: TAPER ROLLER BEARING.

Q: Is this part interchangeable with the ZF 2093.122.034 pump drive?
A: No. The 2093.122.033 has a 14-tooth spline, while the .034 variant uses a 16-tooth spline. Installing the wrong part will cause immediate pump cavitation and transmission damage. Always match the SKU exactly.