ZF 4108.338.020 ADAPTER | OEM Genuine Part

Overview

The ZF 4108.338.020 ADAPTER is a precision-machined OEM genuine component designed to interface critical hydraulic and mechanical circuits within ZF powershift transmissions. Positioned between the main transmission housing and the pump drive assembly, this adapter plate ensures correct oil flow alignment and structural support for auxiliary systems. The SKU 4108.338.020 is engineered to exact ZF tolerances, preventing misalignment that can lead to premature wear on adjacent assemblies. In heavy construction machinery, this part acts as a load-bearing bridge, transferring torque and fluid pressure without distortion.

Symptoms of Failure

• External oil seepage at adapter-to-housing joint: Worn sealing surfaces cause hydraulic fluid to weep, often mistaken for a simple gasket failure. Search query: “ZF transmission adapter oil leak repair.”
• Intermittent gear engagement hesitation: A warped adapter disrupts valve body alignment, leading to delayed clutch pack application. Search query: “construction machinery gear slipping under load.”
• Abnormal vibration from transmission mid-section: Cracks in the adapter casting amplify driveline harmonics, felt as a low-frequency shudder during shifting. Search query: “ZF transmission vibration when shifting.”
• Contaminated transmission fluid with metallic debris: Fretting corrosion between the adapter and HOUSING (4108101068) generates fine metal particles that circulate through the system.

Technical Specifications

Compatibility

This adapter is primarily specified for ZF WG180 and WG200 series powershift transmissions used in wheel loaders, graders, and dozers. It also fits select WG150 and WG250 variants when paired with the correct HOUSING (4108201177). Always verify bolt pattern compatibility with your existing BEARING COVER (4108301304) and SCREW PLUG (0636302056) orientation before installation.

Related Components