ZF 2093.117.021 REAR AXLE HOUS. | OEM Genuine Part

Overview

The ZF 2093.117.021 REAR AXLE HOUSING is a critical structural component within the final drive assembly of heavy-duty construction machinery transmissions. This OEM genuine part encloses the differential and axle shafts, providing the rigid support necessary to withstand extreme torque loads during excavation, grading, and material handling operations. The housing also serves as the primary oil reservoir for the axle assembly, ensuring proper lubrication of all internal gears and bearings. As the central mounting point for the wheel ends, the SKU 2093.117.021 must maintain precise dimensional tolerances to prevent misalignment and premature wear of drivetrain components.

Symptoms of Failure

• Oil seepage around axle seals: When the housing develops hairline cracks or porosity, transmission fluid escapes, leaving visible wet spots on the housing exterior. This is often accompanied by a burnt gear oil smell during operation.
• Abnormal whining or grinding from the rear axle: A warped or damaged housing causes misalignment of the 2093109020: DIFFERENTIAL assembly, creating uneven gear contact patterns that produce distinct tonal changes under load.
• Vibration during straight-line travel: Structural fatigue in the housing allows the axle tubes to flex, transferring harmonic vibrations through the chassis that worsen at higher speeds.
• Contaminated lubricant with metallic debris: Internal spalling of the housing bore surfaces generates metal particles that circulate through the oil, accelerating wear on the 0750117075: TAPER ROLLER BEARING and other rotating elements.

Technical Specifications

Compatibility

This rear axle housing is specifically engineered for ZF WG series powershift transmissions used in construction machinery. It is a direct fit for the WG180 and WG200 transmission models, commonly found in wheel loaders, telehandlers, and backhoe loaders from manufacturers such as Liebherr, JCB, and Caterpillar. The housing also supports the WG150 series when paired with the correct 2093209096: DIFFERENTIAL assembly. For heavy-duty applications requiring reinforced axle capacity, the housing integrates with the 2093309073: DIFF.HOUSING to provide additional structural rigidity under extreme loads.

Related Components

Frequently Asked Questions

Q: Can the ZF 2093.117.021 housing be repaired if it has a crack?
A: While minor cracks in non-structural areas can sometimes be welded by a certified specialist, ZF recommends replacement for any housing showing structural damage. The high stress concentrations in the bearing bore areas make welding unreliable, and a failed repair can lead to catastrophic axle separation during operation.

Q: What torque specifications should be used when installing this housing?
A: The housing-to-transmission bolts require 280 Nm ± 20 Nm when using new OEM fasteners. The differential bearing cap bolts must be torqued to 150 Nm in a cross-tightening pattern. Always consult the specific ZF service manual for your transmission model, as torque values vary between WG180 and WG200 variants.

Q: How can I verify if this housing fits my specific machine model?
A: Cross-reference your machine’s serial number with the ZF transmission tag located on the bell housing. The 2093.117.021 is compatible with any ZF transmission carrying the WG180 or WG200 designation. For machines with aftermarket modifications, measure the existing housing flange bolt pattern (320 mm diameter, 12-bolt pattern) to confirm fitment.