ZF 0501.226.215 ROTOR SET

Overview

The ZF 0501.226.215 ROTOR SET is a precision-engineered hydraulic component designed for the internal oil pump assembly within heavy-duty ZF transmissions. This OEM genuine part, identified by SKU 0501.226.215, is responsible for generating the necessary hydraulic pressure to engage clutches and lubricate planetary gearsets. It sits directly on the pump drive shaft, housed within the main transmission casing, and works in conjunction with the 4143101009 HOUSING to maintain consistent fluid flow. When this rotor set degrades, volumetric efficiency drops, leading to insufficient pressure for gear engagement in construction machinery applications.

Symptoms of Failure

• Delayed or erratic gear engagement: A worn rotor set causes low hydraulic pressure, resulting in hesitation when shifting from neutral to drive or reverse.
• Transmission overheating: Internal leakage from a damaged rotor set reduces oil circulation, causing the transmission to run hotter than normal under load.
• Whining or grinding noise from the pump area: Excessive clearance between the inner and outer rotors produces a high-pitched whine that intensifies with engine RPM.
• Intermittent loss of forward or reverse motion: As the rotor set wears, the pump cannot maintain prime, leading to sudden loss of drive power on inclines or under heavy load.

Technical Specifications

Compatibility

This rotor set is primarily compatible with ZF WG180, WG200, and WG210 series powershift transmissions commonly found in wheel loaders, dozers, and excavators. It also fits select ZF 4WG-180 and 4WG-200 models used in construction machinery from 2005 onward. For proper sealing during installation, always replace the 0634313603 O-RING and inspect the 4143301025 HOUSING for scoring. Secure the assembly using a 4475280018 SCREW PLUG torqued to manufacturer specifications.

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