ZF 2093.070.059 TRA 20 | OEM Genuine Part

Overview

The ZF 2093.070.059 TRA 20 is a precision-engineered transmission component designed for heavy-duty construction machinery. This OEM genuine part functions as a critical load-bearing element within the final drive assembly, ensuring smooth torque transfer from the differential to the axle shafts. The SKU 2093.070.059 is specifically calibrated to maintain gear alignment and reduce friction under extreme operational stress. When installed correctly, this part works in concert with the 2093109050 DIFFERENTIAL to distribute power evenly across the drivetrain, preventing premature wear on adjacent gears and bearings.

Symptoms of Failure

• Intermittent gear slipping under load — When the 2093.070.059 wears, operators may notice a momentary loss of drive power during excavation or grading, often accompanied by a grinding noise from the transmission housing.
• Oil leaks near the axle housing seal — Degradation of this part can cause hydraulic fluid to seep past the 0750117075 TAPER ROLLER BEARING, leaving visible puddles under the machinery after shutdown.
• Vibration during straight-line travel — Worn engagement surfaces create harmonic oscillations that intensify at speeds above 15 km/h, indicating misalignment with the 2093209094 DIFFERENTIAL assembly.
• Increased operating temperature — Excessive friction from a failing 2093.070.059 can raise transmission fluid temperatures beyond 120°C, triggering warning lights on modern construction equipment.

Technical Specifications

Compatibility

This genuine ZF part is engineered for the TRA 20 series final drives, which are commonly paired with the following transmission models: WG180, WG200, WG210, and WG220. It is also compatible with select variants of the ECOMAT 2 and Powershift 2 transmissions used in wheel loaders and excavators. For proper installation, ensure the 2093309078 DIFF.HOUSING is free of cracks and the mating surfaces are clean.

Related Components

Frequently Asked Questions

Q: How do I verify the 2093.070.059 is the correct replacement for my ZF transmission?
A: Cross-reference your transmission model number (e.g., WG180 or WG200) with the OEM part number stamped on the original component. The 2093.070.059 is designed exclusively for TRA 20 final drives; using it in other assemblies may cause clearance issues.

Q: Can I reuse the existing taper roller bearing when installing this part?
A: No. ZF recommends always replacing the 0750117075 TAPER ROLLER BEARING simultaneously, as worn bearings will accelerate wear on the new 2093.070.059 and compromise gear mesh alignment.

Q: What torque specification should I use for the differential housing bolts?
A: For the 2093309078 DIFF.HOUSING, apply 120 Nm (88.5 lb-ft) in a star pattern, then perform a final pass at 180 Nm (132.8 lb-ft). Always consult your equipment’s service manual for exact values.