ZF 4407.301.145 WASHER | OEM Genuine Part

Overview

The ZF 4407.301.145 WASHER is an OEM genuine shim component engineered for precise axial clearance control within ZF heavy-duty transmission assemblies. This hardened steel washer sits between the planetary gear carrier and the housing end cover, maintaining critical bearing preload and gear mesh alignment. The SKU 4407.301.145 is specifically calibrated to prevent axial play in construction machinery transmissions operating under high torque loads. When installed alongside the 4143101009: HOUSING and 4143301025: HOUSING, this washer ensures the entire rotating assembly remains within factory tolerances.

Symptoms of Failure

• Transmission oil seepage at housing seam: A worn 4407.301.145 washer allows the housing to shift, breaking the seal created by the 0634313603: O-RING and causing slow fluid loss around the mating surfaces.
• Intermittent gear slipping under load: As the washer thickness degrades from fretting, axial clearance increases, leading to momentary loss of drive engagement when the machine is under heavy excavation or lifting loads.
• Metallic grinding noise from transmission sump: Excessive end-play causes the planetary gears to contact the housing wall, producing a distinct grinding sound during deceleration or low-speed maneuvering.
• Increased vibration at the torque converter housing: A collapsed washer creates imbalance in the rotating assembly, transmitting vibration through the 4475280018: SCREW PLUG and into the driveline.

Technical Specifications

Compatibility

This washer is a direct fit for ZF WG180, WG200, and WG210 series transmissions commonly found in wheel loaders, telehandlers, and graders from manufacturers such as Liebherr, Volvo, and Caterpillar. It is also used in select ZF 4WG-200 and 6WG-200 powershift models. For proper installation, always pair the 4407.301.145 with a new 0634313591: O-RING and verify housing alignment using the 0501342341: SUPPORT RING.

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