ZF 0630.004.117 SHIM RING for WG65 | OEM Genuine Part

Overview

The ZF 0630.004.117 SHIM RING is a precision-engineered adjustment component designed for the WG 65 series of heavy-duty transmissions. This OEM genuine part, identified by SKU 0630.004.117, sits between the transmission housing and the bearing assembly to establish the correct axial clearance and preload. By compensating for manufacturing tolerances, this shim ring ensures that gear meshing remains optimal and that rotating elements operate within their designed load limits. Without this critical spacer, the entire gear train can experience misalignment, leading to accelerated wear and reduced torque transfer efficiency.

Symptoms of Failure

• Excessive axial play in the output shaft: When the shim ring wears or compresses beyond tolerance, noticeable end-play develops, causing the shaft to shift under load and produce a distinct clunking noise during acceleration or deceleration.
• Oil leaks near the housing joint: A degraded shim ring can alter the clamping force on the TRANSMISSION HOUSING, allowing transmission fluid to seep past the gasket surface and accumulate on the bell housing.
• Gear slipping under heavy load: Incorrect shim thickness reduces bearing preload, permitting the mainshaft to drift and causing intermittent loss of drive engagement, particularly in lower gears.
• Vibration at highway speeds: Worn clearance allows the gear cluster to oscillate radially, transmitting harmonic vibrations through the driveline that worsen as RPM increases.

Technical Specifications

Compatibility

This shim ring is specifically validated for the ZF WG 65 series, but its dimensional profile also suits several other ZF off-highway and industrial transmissions. Compatible models include the WG65, WG80, WG100, WG120, WG150, WG180, and WG200. Always verify the required shim thickness against your transmission’s service manual, as multiple thickness variants exist for fine-tuning clearance. When replacing this component, it is common practice to also inspect and replace the HEXAGON SCREW (0636011038) and the HEXAGON SCREW (0636011118) that secure the housing, as these fasteners can stretch over time. Additionally, the HEXAGON SCREW (0636016015) used in the bearing retainer should be torqued to specification during reassembly.

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