ZF 5838.300.817 THRUST WASHER | OEM Genuine Part

Overview

The ZF 5838.300.817 THRUST WASHER is an OEM genuine component engineered to manage axial loads and maintain precise clearances within the planetary gear sets of heavy-duty construction machinery transmissions. Positioned between rotating gears and stationary housings, this hardened steel washer prevents metal-on-metal contact, reducing friction and heat buildup. The SKU 5838.300.817 is a critical wear item that ensures the differential assembly and final drive components remain correctly spaced under extreme torque conditions. When installed alongside a 5838109007: DIFFERENTIAL, this thrust washer stabilizes the gear stack, directly influencing the longevity of the entire drivetrain.

Symptoms of Failure

• Transmission whining noise during load shifts: A worn 5838.300.817 washer reduces gear spacing, causing metallic grinding sounds under acceleration.
• Intermittent gear slipping in forward gears: Excessive axial play from a degraded thrust washer allows the clutch packs to lose clamping force, leading to power loss.
• Metallic debris in transmission fluid: Flaking material from the washer contaminates the oil, often requiring replacement of the 0750117075: TAPER ROLLER BEARING and 2095209019: DIFFERENTIAL.
• Hard shifting between ranges: Worn thrust surfaces create binding in the planetary carrier, making gear engagement feel abrupt or delayed.

Technical Specifications

Compatibility

This thrust washer is primarily used in ZF WG180, WG200, and WG250 series powershift transmissions found in wheel loaders, graders, and dozers. It fits both the input planetary and output differential sections. For accurate assembly, always pair this washer with a new 0631329086: SPRING PIN to secure the carrier alignment. The washer is also compatible with ZF 4WG-200 and 6WG-250 variants used in Caterpillar, Volvo, and Case equipment.

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