ZF 4699.309.036 PRESSURE DISK | OEM Genuine Part

Overview

The ZF 4699.309.036 PRESSURE DISK is a critical OEM genuine component engineered for precise hydraulic pressure regulation within ZF powershift transmissions. Positioned directly within the clutch pack assembly, this pressure disk acts as a load-bearing interface, ensuring consistent clamping force during gear engagement. The SKU 4699.309.036 is specifically machined to OEM tolerances to prevent fluid bypass and maintain optimal shift quality. This disk works in concert with the 4699101152: HOUSING to contain hydraulic pressure, while the 4699309059: HOUSING COVER seals the assembly against contamination. Without a properly functioning pressure disk, the entire clutch system cannot achieve the required hydraulic lock-up, leading to power loss under load.

Symptoms of Failure

When the ZF 4699.309.036 pressure disk begins to wear, operators will notice distinct performance degradation. Delayed gear engagement under load is a primary indicator, as the disk loses its ability to maintain flat contact surfaces. Intermittent transmission slipping during uphill operation or heavy digging cycles often points to a warped or scored pressure disk. Hydraulic fluid contamination with metallic debris is another critical symptom, as the hardened steel surface of the disk begins to flake. Finally, erratic shift shock—where the transmission harshly engages or disengages—occurs when the disk’s friction surface becomes glazed. These failure modes directly impact the 0636101411: CAP SCREW torque retention and the alignment provided by the 0631302212: CYLINDRICAL PIN.

Technical Specifications

Compatibility

This pressure disk is designed for integration into ZF’s heavy-duty powershift transmission series commonly found in construction machinery. It is a direct fit for the WG180 and WG200 transmission models, which are used in wheel loaders, graders, and dozers. The disk also applies to the WG150 series when used in high-torque applications. For proper installation, verify the 4699102187: INPUT shaft spline condition and ensure the 0636302013: SCREW PLUG and 0750108986: SCREW PLUG are torqued to factory specifications. The 0769100082: TYPE PLATE should be referenced for exact model variant identification, and the 0637885613: BREATHER must be clear to prevent pressure buildup that could distort the disk.

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