ZF 2093.313.087 PRESSURE RING | OEM Genuine Part

Overview

The ZF 2093.313.087 PRESSURE RING is a precision-engineered component designed to maintain critical hydraulic clamping forces within ZF powershift transmissions used in heavy construction machinery. This OEM genuine part sits directly inside the differential assembly, where it applies axial pressure to clutch packs and planetary gear sets, ensuring smooth torque transfer under extreme loads. The SKU 2093.313.087 is machined from high-strength alloy steel to withstand continuous pressure cycling without deformation. When installed alongside a DIFFERENTIAL HOUSING, this ring forms a sealed pressure boundary that prevents hydraulic fluid bypass, directly influencing shift quality and driveline durability.

Symptoms of Failure

• Delayed or harsh gear engagement: A worn pressure ring cannot maintain adequate clamping force, causing clutches to slip before fully engaging. Operators often report a “lurching” sensation when shifting from neutral to drive.
• Internal hydraulic pressure loss: Cracks or wear on the ring face allow transmission fluid to leak past the seal, leading to low line pressure warnings on the machine’s diagnostic display.
• Metallic debris in transmission oil: As the pressure ring surface degrades, fine steel particles contaminate the hydraulic circuit, accelerating wear on the TAPER ROLLER BEARING and adjacent planetary gears.
• Overheating differential assembly: Insufficient pressure causes continuous clutch slip, generating excessive heat that can warp the DIFFERENTIAL HOUSING if left unaddressed.

Technical Specifications

Compatibility

This pressure ring is primarily designed for ZF WG180, WG200, and WG210 series transmissions commonly found in wheel loaders, graders, and heavy dump trucks. It also fits select variants of the ZF 4WG-200 and 5WG-300 power shift models. The ring interfaces directly with the DIFFERENTIAL (part 2093209023) and the DIFFERENTIAL (part 5838109012) to create a sealed hydraulic chamber. Always verify your transmission model’s parts manual before installation, as minor design variations exist between early and late production units.

Related Components

Frequently Asked Questions

Q: Can I reuse the old pressure ring if it looks undamaged?
A: No. The ZF 2093.313.087 pressure ring undergoes work hardening during service. Even if surface wear is not visible, micro-cracks can form that lead to sudden failure under load. Always replace with a new OEM genuine part.

Q: What tools are needed to install this pressure ring?
A: You will need a hydraulic press with a 50-ton capacity, a bearing separator, and a dial indicator to verify ring flatness after installation. The ring must be pressed squarely into the differential housing to avoid distortion.

Q: How does this part interact with the TAPER ROLLER BEARING?
A: The pressure ring sits directly against the inner race of the 0750117075 TAPER ROLLER BEARING. Proper preload from the ring ensures the bearing maintains correct rolling element contact, preventing premature spalling.