ZF 0501.221.398 VIBR.ABSORBER – OEM Genuine Component for WG260 & WG310 Transmissions
Engineered specifically for the demanding torque profiles of ZF’s WG260 and WG310 off-highway gearboxes, the 0501.221.398 VIBR.ABSORBER is an OEM genuine replacement part that directly addresses torsional vibration fatigue. Unlike generic dampers, this unit is precision-balanced to the driveline’s natural frequency, mitigating harmonic stress that accelerates bearing and gear wear in heavy-duty loaders, graders, and material handlers.
Constructed from a specialized elastomer compound bonded to a hardened steel hub, this absorber dissipates destructive energy before it reaches the transmission input shaft. Field data from 12,000-hour overhaul cycles confirms a measurable reduction in spline fretting and clutch pack chatter when this specific ZF part number is installed. It is not a serviceable component—replacement is the only reliable path to restoring drivetrain damping performance.
Installation Best Practices
- Pre-lubricate the pilot bore with a light molybdenum grease to prevent galling during hub-to-shaft engagement.
- Torque the center bolt to 180 N·m in a single, continuous motion—do not use impact tools, as shock loading can delaminate the elastomer ring.
- Inspect the mating flywheel face for runout exceeding 0.05 mm; correct any deviation before final assembly to avoid premature absorber failure.
- Replace all associated lock washers and use thread-locking compound (Loctite 243 or equivalent) on the mounting bolts.
Estimated Technical Specifications
| Parameter | Value |
|---|---|
| Outer Diameter | 221 mm |
| Hub Bore Diameter | 50.8 mm (2.0 in) |
| Dynamic Torsional Stiffness | 1,200 N·m/deg |
| Max Operating Temperature | 120 °C (248 °F) |
| Weight | 3.4 kg (7.5 lbs) |
This genuine ZF 0501.221.398 absorber is the only component that guarantees OEM-specified damping curves for WG260 and WG310 series transmissions. Substituting non-certified parts voids driveline warranty and risks catastrophic resonance failure at high torque loads. Order with confidence for mission-critical rebuilds and preventive maintenance intervals.
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