ZF Oil Pump – Precision Hydraulic Core for Off-Highway Durability
Engineered specifically for the demanding power take-off (PTO) circuits of ZF’s WG200 and ERGOPOWER series transmissions, this oil pump is not a generic replacement—it is a calibrated hydraulic heart. It delivers consistent, high-volume lubrication and clutch actuation pressure, directly influencing shift quality and thermal stability in heavy machinery. Unlike aftermarket alternatives, this unit maintains the exact Gerotor clearance and pressure relief calibration required for ZF’s modular transmission architecture.
Primary Applications
- Wheel Loaders: Liebherr L556, Caterpillar 950 GC (with ZF WG200)
- Motor Graders: Volvo G940, John Deere 772GP (ERGOPOWER 4-speed)
- Telehandlers: JCB 560-80, Manitou MT 1440 (ZF 4WG-310 variants)
Common Troubleshooting
When this pump begins to fail, operators often report delayed clutch engagement or a whining noise at idle. First, verify the suction strainer is not clogged with debris—this mimics pump failure. If pressure at the main regulator valve drops below 18 bar (260 psi) at operating temperature, inspect the pump’s internal wear plate for scoring. A failing pump will also cause erratic shifting under load, particularly in 2nd-to-3rd gear transitions. Always replace the O-ring on the pump mounting flange to prevent air ingestion.
Estimated Technical Specifications
| Parameter | Value |
|---|---|
| Weight | 3.8 kg (8.4 lbs) |
| Housing Material | High-pressure die-cast aluminum (EN AC-44300) |
| Displacement | 22.5 cc/rev |
| Max Continuous Pressure | 25 bar (363 psi) |
| Mounting Flange | SAE A 2-bolt (82 mm pilot) |
This pump is a direct-fit, serviceable component—not a sealed unit. For severe duty cycles, we recommend pairing it with a new ZF suction filter to extend service life beyond the typical 4,000-hour interval.
