ZF 0631.501.315 FITTED KEY | OEM Genuine Part

Overview

The ZF 0631.501.315 FITTED KEY is an OEM genuine part engineered to secure rotating components within the transmission assembly. This precision-machined key sits in the shaft-keyway interface of ZF construction machinery transmissions, ensuring torque transfer between the shaft and the hub without slippage. The SKU 0631.501.315 is a critical locating element that prevents relative motion between mated parts, directly supporting the integrity of the drivetrain. When installed correctly, this fitted key works in conjunction with the 4699101045: HOUSING and the 4699301108: HOUSING to maintain precise alignment under high load conditions.

Symptoms of Failure

• Transmission gear slipping under load – A worn or sheared fitted key allows the shaft to rotate independently from the gear, causing intermittent power loss during operation.
• Abnormal metallic rattling from the transmission housing – Loose key fit generates a distinct clicking or knocking sound as the shaft and hub impact each other.
• Oil leaks near the shaft output seal area – Key failure can misalign the shaft, damaging the 4699301085: COVER and leading to fluid seepage.
• Vibration during gear engagement – Uneven torque distribution from a compromised key causes driveline shudder, especially in low-range operation.

Technical Specifications

Compatibility

This fitted key is designed for ZF powershift transmissions commonly used in construction machinery. It is compatible with the following ZF transmission models: WG180, WG200, WG210, and WG310. The part also fits select 4WG-200 and 5WG-210 variants. For proper installation, always inspect the 4699301014: THREAD PROTECTIVE SHIELD for thread damage before reassembly.

Related Components