ZF 0501.317.191 CAM DISC | OEM Genuine Part

Overview

The ZF 0501.317.191 CAM DISC is a precision-machined actuation component engineered for heavy-duty construction machinery transmissions. This OEM genuine part governs the sequential engagement of clutch packs and planetary gear sets within the valve body assembly. The SKU 0501.317.191 acts as the mechanical interface that translates hydraulic pilot pressure into rotational motion, directly controlling shift timing and torque distribution. Located in the upper control housing, this disc works in concert with the 0501211694: MOTOR to regulate oil flow paths during gear changes.

Symptoms of Failure

• Erratic shift hunting under load: A worn cam disc profile causes inconsistent clutch engagement, leading to the transmission hunting between gears when climbing grades or hauling heavy payloads.
• Delayed forward/reverse engagement: Operators may notice a 2-3 second lag when shifting from neutral to drive, as the disc fails to rotate the spool valve to its correct position.
• Metallic rattling from valve body area: Excessive clearance between the cam lobe and follower produces a distinct tapping noise at idle, often misdiagnosed as a loose 0501314799: BUSH.
• Intermittent loss of low-range gears: The disc’s hardened surface wears unevenly, causing the transmission to default to a single gear ratio during cold-start operations.

Technical Specifications

Compatibility

This cam disc is validated for use in ZF WG180, WG200, and WG310 powershift transmissions commonly found in wheel loaders, graders, and telescopic handlers. It also fits select 4WG-200 and 6WG-310 variants used in agricultural tractors. The disc interfaces directly with the 4108101140: HOUSING and requires the 0501314793: COVER to maintain proper axial clearance. Always inspect the mating 0501314799: BUSH for ovalization when replacing this component.

Related Components