Overview
The ZF 4166.341.154 PUMP WH.FLANGE for WG65 is a precision-machined hydraulic pump flange designed to mount the transmission oil pump securely within the WG 65 series gearbox. This OEM genuine part, identified by SKU 4166.341.154, serves as the critical interface between the pump assembly and the transmission housing. It ensures proper alignment and sealing of the hydraulic circuit, which is essential for maintaining consistent oil pressure and lubrication throughout the drivetrain. The flange is directly mounted to the TRANSMISSION HOUSING, forming a sealed boundary that prevents contamination and fluid loss.
Symptoms of Failure
When the ZF 4166.341.154 pump flange wears or becomes damaged, operators may notice these specific failure indicators:
- Oil leaks at the pump mounting interface – Visible fluid weeping around the flange joint, often accompanied by low transmission fluid levels.
- Erratic or delayed gear engagement – Insufficient hydraulic pressure due to flange misalignment causes sluggish shifting or slipping under load.
- Unusual whining or cavitation noise – Air ingestion through a compromised flange seal leads to pump noise and reduced lubrication efficiency.
- Overheating transmission fluid – A failing flange disrupts oil flow, causing elevated operating temperatures and potential damage to internal components.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 4166.341.154 |
| Product Name | PUMP WH.FLANGE |
| Material | High-grade cast aluminum alloy |
| Weight | 0.85 kg (1.87 lbs) |
| OEM Reference | ZF 4166.341.154 |
| Mounting Bolt Pattern | 6-hole, M10 thread |
| Seal Type | Integrated O-ring groove |
Compatibility
This pump flange is specifically engineered for the ZF WG 65 series transmissions. It is compatible with models including WG65, WG80, WG100, WG120, WG150, WG180, and WG200. The flange interfaces directly with the HOUSING (part 4616301307) and the HOUSING (part 4616301309) to create a secure pump mounting platform. For proper installation, use the HEXAGON SCREW (part 0636011118) to fasten the flange to the transmission housing.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616101066 | TRANSMISSION HOUSING | Main structural casing for gear assembly |
| 0636011118 | HEXAGON SCREW | Fastener for flange mounting |
| 4616301307 | HOUSING | Intermediate pump support housing |
| 4616301309 | HOUSING | Secondary pump housing component |
| 0636011038 | HEXAGON SCREW | Additional mounting fastener |
| 0636016015 | HEXAGON SCREW | High-torque flange bolt |
| 0631306085 | CYLINDRICAL PIN | Alignment dowel for flange positioning |
| 0634313118 | O-RING | Seal between flange and housing |
| 0636304019 | SCREW PLUG | Port closure for pressure testing |
| 0634801152 | SEALING RING | Leak prevention at threaded connections |
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