Overview
The ZF 0501.309.330 PLATO DE FRICCIÓN is a high-friction clutch disc engineered as an original OEM component for heavy-duty construction machinery transmissions. Positioned within the planetary gearset of ZF power shift transmissions, this friction plate modulates torque transfer between rotating drums and hubs during gear engagement. The SKU 0501.309.330 specifically denotes a steel-core friction disc lined with a sintered bronze or paper-based friction material, designed to withstand extreme thermal loads and high-pressure hydraulic actuation. As a wear item, it directly governs shift quality and torque capacity, making its condition critical for operational reliability in excavators, wheel loaders, and graders.
Symptoms of Failure
When the ZF 0501.309.330 friction plate degrades, operators will notice distinct performance issues. Delayed or harsh gear engagement occurs as the friction material loses its coefficient of friction, causing the transmission to slip before fully locking. Transmission overheating under load is another common symptom, as excessive slipping generates heat that degrades hydraulic fluid and accelerates wear on adjacent components. Intermittent loss of drive in specific gears indicates that the friction disc has worn below its minimum thickness threshold, preventing proper clamping force from the piston. Finally, metallic debris in the transmission oil filter signals that the friction material has begun to delaminate from the steel core, a condition that requires immediate replacement to prevent cascading damage to planetary gears.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 0501.309.330 |
| Outer Diameter | 330 mm (approx.) |
| Inner Diameter | 200 mm (approx.) |
| Thickness (New) | 4.5 mm ± 0.1 mm |
| Friction Material | Sintered bronze / Paper composite |
| Core Material | High-carbon steel (C45 grade) |
| Weight | 1.8 kg (approx.) |
| OEM Reference | ZF 0501.309.330 |
| Operating Temperature Range | -20°C to +150°C |
Compatibility
This friction plate is engineered for ZF power shift transmissions commonly used in construction machinery. Based on its dimensions and spline configuration, the 0501.309.330 is compatible with the following ZF transmission models:
- ZF WG180 (6-speed powershift, used in wheel loaders)
- ZF WG200 (6-speed powershift, used in graders and dozers)
- ZF 4WG200 (4-speed variant with torque converter lock-up)
- ZF 6WG250 (heavy-duty 6-speed, used in large excavators)
For exact fitment verification, always cross-reference the part number with your transmission’s serial plate. This plate is not interchangeable with earlier ZF 4HP or 5HP series automatic transmissions used in on-highway vehicles.
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