Overview
The ZF 4616.122.007 PRESSURE OIL PUMP is a critical hydraulic component engineered specifically for the WG 65 Series transmission. This OEM genuine part is responsible for generating the necessary oil pressure to actuate clutch packs, lubricate bearings, and cool internal gears within the transmission housing. Mounted directly to the TRANSMISSION HOUSING, the pump draws fluid from the sump and delivers it under pressure to the valve body and torque converter. The SKU 4616.122.007 ensures a direct factory-fit replacement, maintaining the precise flow rates required for heavy-duty industrial applications.
Symptoms of Failure
- Erratic gear engagement or slipping: A worn pressure oil pump cannot maintain consistent hydraulic pressure, causing delayed or soft shifts under load.
- Low transmission oil pressure warning: Dashboard or diagnostic alerts indicating insufficient pressure often trace back to pump wear or cavitation.
- Audible whining or grinding noise from the transmission: Damaged pump gears or bearings produce a high-pitched whine that increases with engine RPM.
- Oil leaks near the pump mounting flange: Failed seals allow pressurized fluid to escape, often pooling around the HEXAGON SCREW fasteners securing the pump to the housing.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number (SKU) | 4616.122.007 |
| OEM Reference | ZF 4616.122.007 |
| Material | High-strength aluminum alloy with hardened steel gears |
| Weight | 2.8 kg (6.2 lbs) |
| Dimensions (L x W x H) | 180 mm x 120 mm x 95 mm |
| Operating Pressure Range | 8–18 bar (116–261 psi) |
| Flow Rate | 22 L/min at 1500 RPM |
Compatibility
This pressure oil pump is designed for the ZF WG 65 Series transmission family. Based on its hydraulic displacement and mounting pattern, it is also compatible with the following ZF models that share the same pump interface: WG180, WG200, WG210, and WG250. Always verify the pump cavity within your specific HOUSING or HOUSING variant before installation to confirm fitment.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616101066 | TRANSMISSION HOUSING | Main structural casing that houses the pump and gearset |
| 0636011118 | HEXAGON SCREW | Fastens the pump to the transmission housing |
| 4616301307 | HOUSING | Intermediate housing for pump mounting |
| 4616301309 | HOUSING | Alternate housing variant for pump integration |
| 0636011038 | HEXAGON SCREW | Secondary fastener for pump cover |
| 0636016015 | HEXAGON SCREW | Mounting bolt for pump inlet flange |
| 0631306085 | CYLINDRICAL PIN | Alignment dowel for pump-to-housing positioning |
| 0634313118 | O-RING | Seals the pump outlet port against leaks |
| 0636304019 | SCREW PLUG | Closes pressure test ports on the pump body |
| 0634801152 | SEALING RING | Prevents fluid leakage at the pump shaft |
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