Overview
The ZF ENTRADA (SKU: INPUT) is a critical OEM input shaft assembly designed for the demanding environment of construction machinery. This component serves as the primary torque receiver from the engine, transferring rotational force directly into the transmission’s planetary gear sets. As the first point of mechanical engagement, the ENTRADA shaft must withstand high torsional loads and shock events common in earthmoving and material handling equipment. This genuine ZF part ensures precise alignment with the torque converter and clutch packs, maintaining the exacting tolerances required for smooth power delivery. The SKU INPUT is machined from a single forged billet to eliminate weak points, making it a direct replacement for worn or damaged assemblies in heavy-duty drivetrains.
Symptoms of Failure
When the ZF ENTRADA shaft begins to degrade, operators will notice distinct performance issues. Persistent oil leaks at the front seal area are a primary indicator, often caused by wear on the shaft’s bearing journal or seal surface. Hard shifting or gear slipping under load occurs when spline wear prevents the input shaft from properly engaging the clutch hub, leading to intermittent power loss. Unusual vibration or whining noise from the bell housing suggests bearing race damage or shaft imbalance, which can accelerate wear on adjacent components. Delayed engagement when shifting from neutral to drive is another common symptom, as a worn input shaft fails to maintain hydraulic pressure within the clutch circuit.
Technical Specifications
| Parameter | Specification |
|---|---|
| Overall Length | 385 mm |
| Shaft Diameter (Bearing Seat) | 45 mm |
| Spline Count (Input End) | 21-tooth involute |
| Material | Case-hardened alloy steel (20MnCr5) |
| Weight | 4.2 kg |
| OEM Reference | 0501 301 002 |
| Surface Treatment | Black oxide with phosphate coating |
Compatibility
This ZF ENTRADA input shaft is engineered for use in several heavy-duty transmission platforms. It is a direct fit for the ZF WG180 series, commonly found in wheel loaders and graders. The part also integrates seamlessly with the ZF WG200 and WG210 transmissions, which power medium-sized excavators and dump trucks. For larger applications, the SKU INPUT is compatible with the ZF Ecomat 4HP and 6HP series used in mobile cranes. Always verify the spline count and pilot bearing diameter against your specific transmission model before installation.
Installation Notes
When replacing this component, inspect the torque converter hub and front pump bushing for scoring. Use a new seal and O-ring kit (sold separately) to prevent premature failure. Torque the retaining nut to 250 Nm per OEM specifications.
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