Overview
The ZF 0501.007.517 SYNCHRONIZER is a critical OEM genuine component engineered to facilitate smooth gear engagement within heavy-duty construction machinery transmissions. Positioned directly on the main shaft assembly, this synchronizer hub and sleeve unit ensures that gear speeds are matched before locking, preventing grinding and mechanical shock during shifts. The SKU 0501.007.517 is specifically designed to interface with the clutch pack and shift fork, making it indispensable for maintaining driveline integrity under high-torque loads. When paired with a properly functioning 5838109012: DIFFERENTIAL, this synchronizer ensures seamless power transfer from the transmission to the axles.
Symptoms of Failure
- Hard shifting or gear clash: A worn 0501.007.517 synchronizer will cause difficulty engaging gears, often accompanied by a grinding noise, especially during upshifts or downshifts under load.
- Transmission jumping out of gear: When the synchronizer teeth or blocker rings wear, the transmission may unexpectedly disengage from a selected gear, creating a dangerous operating condition.
- Delayed engagement: Operators may notice a lag between moving the shift lever and the gear actually engaging, indicating that the synchronizer is failing to match shaft speeds efficiently.
- Metallic debris in transmission oil: As the synchronizer wears, fine metal particles can contaminate the lubricant, often visible during oil changes or when inspecting the 5838300626: DIFFERENTIAL HOUSING for sludge.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 0501.007.517 |
| Material | Case-hardened alloy steel with molybdenum coating |
| Outer Diameter | 165 mm (estimated) |
| Inner Diameter | 85 mm (estimated) |
| Width | 42 mm (estimated) |
| Weight | 1.8 kg (4.0 lbs) |
| OEM Reference | ZF 0501.007.517 |
| Operating Temperature | -40°C to +120°C |
Compatibility
This OEM genuine synchronizer is engineered for use in ZF powershift transmissions commonly found in construction machinery. Based on its design and spline configuration, the 0501.007.517 is compatible with the following ZF transmission models: WG180, WG200, WG210, and WG250. It is also used in select variants of the 4WG-200 and 6WG-250 series. For optimal performance, this synchronizer should be installed alongside a new 0750117075: TAPER ROLLER BEARING to support the main shaft, and the 2093209023: DIFFERENTIAL should be inspected for wear during the rebuild process.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 5838109012 | DIFFERENTIAL | Distributes torque to drive axles |
| 0750117075 | TAPER ROLLER BEARING | Supports radial and axial shaft loads |
| 2093209023 | DIFFERENTIAL | Secondary torque distribution unit |
| 5838300626 | DIFFERENTIAL HOUSING | Encloses differential gears and bearings |
| 0631329088 | SPRING PIN | Secures shift fork to synchronizer sleeve |
| 5838300811 | THRUST WASHER | Reduces axial friction between gears |
| 5838300721 | AXLE BEVEL GEAR | Transfers power to wheel hubs |
| 5838300633 | AXLE | Rotates to drive wheels |
| 5838300753 | THRUST WASHER | Controls gear end-play |
| 5838300818 | THRUST WASHER | Provides wear surface for planetary gears |
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