Overview
The ZF 4660.122.008 PRESSURE OIL PUMP is a critical hydraulic component engineered specifically for the WG 92 Series transmission family. This OEM genuine part generates the essential oil pressure required to actuate clutch packs, lubricate bearings, and cool internal assemblies within the gearbox. Mounted directly to the TRANSMISSION HOUSING, the pump draws fluid from the sump and delivers it under precise pressure to the valve body and torque converter circuit. As the heart of the hydraulic system, the SKU 4660.122.008 ensures consistent flow rates even under heavy load conditions, directly influencing shift quality and overall transmission longevity.
Symptoms of Failure
- Delayed or harsh gear engagement: When the pump loses prime or internal clearances widen, hydraulic pressure drops, causing noticeable hesitation when shifting from Neutral to Drive or Reverse.
- Low transmission oil pressure warning: A worn pressure oil pump triggers intermittent pressure loss, often indicated by dashboard warnings or erratic shift patterns during acceleration.
- Whining or grinding noise from the bell housing: Cavitation or worn pump gears produce a distinct high-pitched whine that increases with engine RPM, signaling imminent pump failure.
- Overheating transmission fluid: Insufficient oil circulation from a failing pump leads to inadequate cooling, causing fluid to darken and emit a burnt odor.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 4660.122.008 |
| OEM Reference | ZF 4660.122.008 |
| Material | High-strength aluminum alloy with hardened steel gears |
| Weight | 2.4 kg (5.3 lbs) |
| Overall Dimensions | 180 mm x 120 mm x 95 mm |
| Flow Rate | 18 L/min at 1500 RPM |
| Maximum Operating Pressure | 12 bar (174 psi) |
| Seal Type | Integrated O-ring groove (compatible with O-RING) |
Compatibility
This pressure oil pump is designed for the ZF WG 92 Series transmission family. Based on its hydraulic architecture, the 4660.122.008 is also compatible with the WG180, WG200, and WG210 models that share the same pump mounting pattern and drive gear interface. It directly replaces the pump assembly in units equipped with the HOUSING variant found in later WG92 revisions. Always verify the pump cavity depth and dowel pin alignment using the CYLINDRICAL PIN before installation. The assembly also requires a SCREW PLUG to seal the pressure test port after installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4660101023 | TRANSMISSION HOUSING | Main structural casing housing the pump and gear train |
| 4660301058 | HOUSING | Intermediate housing supporting pump mounting |
| 0631306174 | CYLINDRICAL PIN | Alignment dowel for pump-to-housing positioning |
| 0750100022 | SCREW PLUG | Seals pressure test port on pump body |
| 4660301009 | BRACKET | Mounting bracket for pump support |
| 4660221039 | TUBE | Suction tube connecting pump to sump |
| 0636103274 | CAP SCREW | Fastener securing pump to housing |
| 0634306185 | O-RING | Seal between pump and housing interface |
| 4660221041 | TUBE | Pressure line tube from pump to valve body |
| 4660221040 | TUBE | Return tube from cooler to pump inlet |
ZF 4660.122.008 PRESSURE OIL PUMP – Oil Pump RFQ Support
PartsZF helps buyers confirm ZF 4660.122.008 PRESSURE OIL PUMP for oil-supply and lubrication service work. The page keeps the RFQ details focused on part-number evidence and available documentation.
Part-Number Summary
Use ZF number 4660.122.008 when sending your RFQ. PartsZF can review dotted, spaced, and compact number formats against the available product and documentation records.
Application Context
- Illustration section: PRESSURE OIL PUMP
Cross Reference Support
If you have an OEM number, old supplier number, or visible marking, include it with your RFQ so PartsZF can compare it with the available records.
Specification Snapshot
| ZF part number | 4660.122.008 |
|---|---|
| Normalized SKU | 4660122008 |
| Part name | PRESSURE OIL PUMP |
| Product category | oil pump |
| RFQ support | Part-number lookup and documentation review |
| Media support | Product photo or diagram review when available |
Image and Documentation Notes
Current product media status: fallback. Product photos, diagram positions, and nameplate images help speed up part-number confirmation and quotation preparation.
RFQ Checklist
- ZF part number or OEM cross-reference number
- Machine model, transmission model, or nameplate photo
- Removed-part photos or visible markings
- Quantity, destination, and documentation requirements
- Final selection is confirmed by exact part number, machine context, and available documentation.
Related Parts
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- ZF 4616.122.005 PRESSURE OIL PUMP
- ZF 4661.122.001 PRESSURE OIL PUMP
