ZF 4407.301.140 WASHER | OEM Genuine Part

Overview

The ZF 4407.301.140 WASHER is an OEM genuine precision shim used to establish correct axial clearance and preload within ZF construction machinery transmissions. This hardened steel washer sits between the rotating gear sets and the transmission housing, acting as a critical spacer that absorbs thrust loads and maintains precise gear alignment. The SKU 4407.301.140 is engineered to factory tolerances, ensuring that clutch packs and planetary gears operate within their designed end-play specifications. When installed alongside the 4143101009 HOUSING and the 4143301025 HOUSING, this washer prevents metal-to-metal contact and distributes clamping force evenly across the assembly.

Symptoms of Failure

• Transmission oil leaks at housing seams: A worn 4407.301.140 washer reduces clamping force, allowing the 0634313603 O-RING to lose its seal, leading to external fluid seepage.
• Gear slipping under load in construction equipment: Excessive axial play from a collapsed washer causes planetary gear sets to misalign, resulting in intermittent power loss during excavation or grading operations.
• Metallic grinding noise during shifting: When the washer thickness degrades, hardened steel components contact the housing directly, producing a distinct grinding sound that worsens with transmission temperature.
• Increased vibration at the driveline: Loss of preload allows the shaft assembly to oscillate, transferring vibration through the 4475280018 SCREW PLUG and into the chassis.

Technical Specifications

Compatibility

This washer is a standard shim component in ZF WG180, WG200, and WG310 series transmissions used in wheel loaders, telehandlers, and excavators. It also appears in select ZF 4WG-200 and 6WG-310 power shift models. Always verify the stack height requirement for your specific transmission variant, as multiple washers may be combined to achieve the correct end-play. For seal replacement, pair this part with the 4143298457 SEAL KIT to ensure all gaskets and O-rings are renewed simultaneously.

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