ZF 4699.301.225 THREAD PROTECTIVE SHIELD | OEM Genuine Part

Overview

The ZF 4699.301.225 THREAD PROTECTIVE SHIELD is a critical OEM genuine component engineered to safeguard the threaded bores and studs within ZF construction machinery transmissions. This shield prevents contamination from debris, moisture, and metal shavings during assembly, maintenance, or storage, ensuring thread integrity and preventing costly cross-threading or galling. Positioned directly on the transmission housing interface, the 4699.301.225 shield works in concert with the 4699101109 HOUSING to maintain a sealed environment. The SKU 4699.301.225 is a direct replacement for worn or missing shields, preserving the transmission’s structural reliability under extreme loads.

Symptoms of Failure

• Thread galling or seizing: When the 4699.301.225 shield cracks or deforms, exposed threads can bind during bolt installation, leading to stripped threads and costly housing repairs.
• Oil seepage around mounting points: A compromised shield allows lubricant to escape past the 0634303141 O-RING, resulting in visible drips and reduced fluid levels.
• Metallic debris in transmission fluid: Without proper thread protection, metal particles from damaged threads contaminate the oil, accelerating wear on the 4699103030 OUTPUT shaft and bearings.
• Vibration or loose fasteners: A missing shield allows dirt to pack into threads, causing bolts to loosen under vibration, which may misalign the 4699102144 INPUT assembly.

Technical Specifications

Compatibility

This thread protective shield is designed for ZF WG180, WG200, and WG250 series transmissions used in construction machinery such as wheel loaders, telehandlers, and graders. It also fits select ZF 4WG-200 and 6WG-200 variants. The 4699.301.225 interfaces directly with the 4699003053 GK20 II gearbox kit, ensuring proper thread alignment during rebuilds. Always verify housing compatibility with the 4699101109 HOUSING before installation.

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