ZF 4642.324.021 PUMP FLANGE for WG200/WG65 | OEM Genuine Part

Overview

The ZF 4642.324.021 PUMP FLANGE is a precision-machined component designed for the WG 200 and WG 65 series transmissions. This OEM genuine part serves as the critical interface between the hydraulic pump and the transmission housing, ensuring proper alignment and sealing for optimal oil flow. The SKU 4642.324.021 mounts directly onto the 4616101065 TRANSMISSION HOUSING, providing a secure mounting point for the pump assembly. Without this flange, the transmission cannot maintain hydraulic pressure, making it essential for gear engagement and clutch operation in heavy-duty applications.

Symptoms of Failure

• Hydraulic oil seepage around pump mounting area – A worn or cracked 4642.324.021 flange often causes visible oil leaks at the pump-to-housing joint, leading to low fluid levels and eventual transmission overheating.
• Intermittent gear slippage under load – When this pump flange deforms or develops micro-fractures, hydraulic pressure drops, causing erratic clutch engagement and slipping during acceleration or hill climbs.
• Unusual whining or cavitation noise from pump – A misaligned flange allows air ingestion into the hydraulic circuit, producing a high-pitched whine that worsens as the transmission warms up.
• Erratic shift timing or delayed engagement – Reduced pump efficiency from a failing flange leads to inconsistent shift points, particularly in reverse or low gear ranges.

Technical Specifications

Compatibility

This pump flange is engineered for ZF WG 200 series transmissions (including WG180, WG200, WG210) and WG 65 series units (WG65, WG68). It is commonly used in municipal trucks, refuse vehicles, and construction equipment. The flange interfaces with the 0636011038 HEXAGON SCREW, 0636011118 HEXAGON SCREW, and 0636016015 HEXAGON SCREW for secure mounting. Always verify your transmission model suffix before installation.

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