ZF 0750.117.721 ROLLER BEARING | OEM Genuine Part

Overview

The ZF 0750.117.721 ROLLER BEARING is a critical OEM genuine component engineered for the high-torque planetary gear sets found in heavy-duty construction machinery transmissions. This precision-ground bearing sits directly within the intermediate shaft housing, where it manages radial loads and ensures smooth rotational alignment between the sun gear and the planetary carrier. As a factory-spec replacement, the SKU 0750.117.721 guarantees exact dimensional tolerances and metallurgical composition required to maintain gear mesh integrity under extreme cyclic loads. Without this bearing, the transmission’s power flow becomes unstable, leading to accelerated wear on adjacent clutch packs and gear teeth.

Symptoms of Failure

When the ZF 0750.117.721 roller bearing begins to degrade, operators will notice distinct performance issues. Recognizing these symptoms early can prevent catastrophic transmission damage:

• Low-frequency growling or rumbling from the transmission housing – This noise typically intensifies during acceleration or when the machine is under load, indicating spalling on the bearing raceways.
• Intermittent gear slipping under heavy load – As the bearing loses its radial support, the planetary gears can shift out of proper alignment, causing momentary loss of torque transfer.
• Metallic debris in the transmission fluid – Small, shiny particles on the magnetic drain plug or in the oil filter are a direct sign that the bearing’s hardened steel surfaces are fragmenting.
• Vibration felt through the chassis during directional shifts – Worn rollers create uneven rotation, transmitting harsh vibrations through the driveline when the transmission changes from forward to reverse.

Technical Specifications

Compatibility

This roller bearing is a direct-fit replacement for several ZF power-shift transmission models commonly used in wheel loaders, telehandlers, and graders. Based on its dimensional profile and load rating, the 0750.117.721 is compatible with the following ZF transmission series:

• ZF WG180 – All variants (WG180 I, II, III) used in mid-size construction loaders.
• ZF WG200 – Standard and heavy-duty configurations for articulated dump trucks.
• ZF 4WG-200 – Four-speed powershift units with integrated torque converter.
• ZF 6WG-200 – Six-speed versions requiring high radial load support in the planetary section.

Note: Always verify the bearing’s position within the transmission assembly using your machine’s service manual. While this part fits the above models, specific shaft configurations may vary by OEM vehicle manufacturer.