ZF 0730.300.685 SHIM | OEM Genuine Part

Overview

The ZF 0730.300.685 SHIM is a precision-engineered OEM genuine part designed to establish the correct axial clearance and preload within ZF heavy-duty transmission assemblies. Positioned between the clutch pack and the housing wall, this shim compensates for manufacturing tolerances and wear, ensuring that gear engagement remains consistent under high torque loads. The SKU 0730.300.685 is critical for maintaining the exact stack height required for proper hydraulic piston travel and clutch pack compression. Without this shim, the transmission’s internal clearances can drift, leading to premature component fatigue. This part is often replaced in conjunction with the 4699101124 HOUSING to restore factory-specified tolerances during a major rebuild.

Symptoms of Failure

• Intermittent gear slipping under load: When the 0730.300.685 shim wears or compresses beyond its service limit, the clutch pack loses clamping force, causing the transmission to slip during acceleration or uphill operation.
• Delayed engagement from Neutral to Drive: A worn shim alters the piston stroke, resulting in a noticeable lag when shifting from neutral into a forward or reverse gear.
• Metallic rattling or knocking from the bell housing: Excessive axial play due to a collapsed shim allows internal components to contact the 4699301209 HOUSING, producing audible noise during idle or deceleration.
• Low hydraulic pressure readings at the clutch circuit: Incorrect shim thickness can cause internal leakage past the piston seals, which is often misdiagnosed as a pump failure.

Technical Specifications

Compatibility

This shim is a standard fitment for ZF WG180, WG200, and WG210 series powershift transmissions commonly used in construction machinery such as wheel loaders, graders, and telehandlers. It also applies to the ZF 4WG-200 and 6WG-200 variants. The 0730.300.685 shim is installed directly behind the clutch piston retainer and must be paired with the 4699301015 HOUSING COVER and the 4699301085 COVER to ensure a sealed, leak-free assembly. Always verify the shim count during reassembly, as multiple shims may be stacked to achieve the correct end-play.

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