Overview
The ZF 0501 DISC is a critical friction component engineered for the high-torque environments of construction machinery transmissions. This OEM genuine part functions as a clutch disc, responsible for transferring rotational force between gear sets during shifting operations. Positioned within the hydraulic clutch pack assembly, the 0501 DISC ensures smooth engagement and disengagement of gears, directly influencing machine responsiveness and operator control. The SKU 0501 identifies this specific disc as a factory-spec replacement, guaranteeing dimensional accuracy and material composition that matches the original transmission design. Without this disc functioning correctly, power delivery becomes erratic, leading to inefficient operation and potential drivetrain damage.
Symptoms of Failure
When the ZF 0501 DISC begins to wear, operators will notice distinct performance degradation. Recognizing these signs early can prevent costly transmission rebuilds.
- Delayed gear engagement or clutch slipping: A worn 0501 DISC loses its friction coefficient, causing the transmission to hesitate before engaging a gear. This often manifests as a “slipping” sensation under load, particularly when climbing grades or moving heavy materials.
- Erratic shifting under load: As the disc surface degrades, the transmission may shift harshly or fail to hold a gear when the machine is under heavy strain. This symptom is frequently searched as “transmission slipping under load in excavator.”
- Burnt transmission fluid odor: Excessive heat generated by a slipping 0501 DISC will scorch the automatic transmission fluid (ATF). A distinct burnt smell from the breather or dipstick indicates internal friction material degradation.
- Reduced machine travel speed: In wheel loaders or dozers, a failing disc can cause a noticeable drop in top travel speed or a lack of power during forward/reverse shuttle shifts.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Number / SKU | 0501 |
| OEM Reference | ZF 0501.000.001 |
| Outer Diameter | 180 mm (7.09 in) |
| Inner Diameter | 120 mm (4.72 in) |
| Thickness (New) | 3.5 mm (0.138 in) |
| Material | Sintered bronze on steel core |
| Friction Lining Type | Paper-based composite (wet clutch) |
| Weight | 0.45 kg (1.0 lb) |
| Operating Temperature Range | -20°C to +120°C (-4°F to 248°F) |
Compatibility
This ZF 0501 DISC is designed for use in specific ZF transmission families commonly found in construction machinery. While not universal, it is a direct fit for the following models based on its friction plate dimensions and spline count:
- ZF WG180 series (used in compact wheel loaders and telehandlers)
- ZF WG200 series (medium-duty wheel loaders and backhoe loaders)
- ZF 4WG-200 powershift transmissions
- ZF 6WG-200 transmissions (certain clutch pack configurations)
Always verify the disc stack height and spline compatibility with your specific transmission serial number before installation. The 0501 DISC is not interchangeable with the ZF 0502 or 0503 variants, which have different thicknesses and friction characteristics.
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