Overview
The ZF 0501.321.252 FLANGE is a critical OEM genuine component designed for high-torque applications within ZF construction machinery transmissions. This flange serves as the primary interface between the transmission output shaft and the driveline, ensuring precise rotational alignment and secure power transfer. Located at the rear of the transmission housing, the 0501.321.252 flange couples directly to the output yoke, absorbing axial loads and maintaining driveline stability under extreme operating conditions. Constructed from forged alloy steel, this genuine part guarantees factory-specified tolerances and fatigue resistance, making it essential for maintaining the integrity of heavy-duty powertrains. The SKU 0501.321.252 is a direct replacement for worn or damaged flanges, eliminating guesswork in repair and rebuild scenarios.
Symptoms of Failure
When the ZF 0501.321.252 flange begins to degrade, operators will notice distinct performance issues. Recognizing these symptoms early can prevent catastrophic driveline damage and costly downtime.
- Driveline vibration at low speeds: A worn flange spline or distorted mating surface causes irregular rotational motion, often felt as a shudder during acceleration or deceleration below 20 mph.
- Transmission fluid seepage from the output seal area: Cracks or pitting on the flange’s sealing surface compromise the output shaft seal, leading to visible oil drips beneath the transmission bell housing.
- Clunking noise during gear engagement: Excessive backlash between the flange and output shaft splines produces a metallic clunk when shifting between forward and reverse gears.
- Uneven tire wear or driveline angle misalignment: A bent or warped flange alters the driveline operating angle, causing premature wear on U-joints and differential components.
Technical Specifications
| Parameter | Specification |
|---|---|
| OEM Part Number | 0501.321.252 |
| Material | Forged alloy steel (42CrMo4 equivalent) |
| Outer Diameter | 180 mm (7.09 in) |
| Bolt Circle Diameter | 150 mm (5.91 in) |
| Pilot Bore Diameter | 65 mm (2.56 in) |
| Overall Thickness | 32 mm (1.26 in) |
| Spline Count | 14 involute splines |
| Weight | 2.8 kg (6.17 lbs) |
| Surface Treatment | Black oxide with anti-corrosion coating |
| OEM Reference | ZF Friedrichshafen AG |
Compatibility
This genuine ZF 0501.321.252 flange is engineered for use in specific heavy-duty transmission models commonly found in wheel loaders, graders, and excavators. Based on its spline configuration and bolt pattern, it is compatible with the following ZF transmission families:
- ZF WG180 series (WG180, WG180C, WG180D)
- ZF WG200 series (WG200, WG200C, WG200D)
- ZF 4WG-180 powershift transmissions
- ZF 4WG-200 powershift transmissions
- ZF Ergopower series (selected models with 14-spline output)
Always verify the output shaft spline count and pilot bore diameter against your specific transmission model before installation. For applications outside these series, consult a ZF service manual or cross-reference the 0501.321.252 with your existing flange dimensions.
