ZF 4699.303.229 THRUST WASHER | OEM Genuine Part

Overview

The ZF 4699.303.229 Thrust Washer is a precision-engineered OEM genuine component designed to manage axial loads and maintain critical clearances within ZF heavy-duty transmissions. Positioned between rotating shafts and stationary housings, this washer prevents metal-on-metal contact, reducing friction and heat buildup in high-torque applications common to construction machinery. The SKU 4699.303.229 is a direct replacement part that ensures consistent oil film distribution, protecting adjacent components like the 4699101159 HOUSING and the 4699301254 HOUSING from premature wear. Without this washer, gear alignment shifts, leading to accelerated damage across the entire transmission assembly.

Symptoms of Failure

• Transmission gear slipping under load — A worn thrust washer reduces clamping force, causing gears to disengage during heavy operation, especially in excavators and loaders.
• Metallic grinding noise from the bell housing — As the washer thins, shaft end-play increases, producing a distinct scraping sound that worsens with RPM changes.
• Low oil pressure warnings — Excessive clearance from a degraded 4699.303.229 allows oil to bypass the lubrication circuit, triggering pressure drops and potential overheating.
• Visible metal debris in transmission fluid — Flaking or cracking of the washer surface contaminates the oil, often requiring a full flush and replacement of the 4699298049 HOUSING KIT.

Technical Specifications

Compatibility

This thrust washer is engineered for ZF WG-series powershift transmissions commonly deployed in construction machinery. It is a direct fit for the WG180, WG200, and WG210 models, as well as the 4WG-200 and 5WG-180 variants. The 4699.303.229 also integrates with the 4699309123 HOUSING COVER to seal the clutch pack area. Always verify your transmission serial number before ordering, as early WG160 units may require a different washer thickness.

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