Overview
The ZF 0501.007.522 SYNCHRONIZER is a precision-engineered internal component responsible for matching rotational speeds between gears during shifting in heavy-duty construction machinery transmissions. This OEM genuine part ensures smooth gear engagement, reducing drivetrain shock and extending transmission life. The SKU 0501.007.522 sits within the synchronizer assembly, directly interfacing with the 2094104412: MAIN SHAFT and the 2094304054: MAIN SHAFT to lock gears in place during operation. Without this synchronizer, gear clash and premature wear become inevitable in high-torque applications.
Symptoms of Failure
- Grinding or crunching noise during gear engagement — A worn 0501.007.522 synchronizer fails to equalize shaft speeds, causing audible metal-on-metal contact when shifting under load.
- Gear slipping or popping out of gear — When the synchronizer hub loses its friction surface, the transmission cannot maintain positive gear lock, leading to unexpected disengagement during operation.
- Hard shifting or blocked gear entry — Operators may experience resistance or complete inability to move the shift lever into a desired gear, particularly in cold oil conditions.
- Increased transmission oil contamination — Worn synchronizer material sheds debris into the lubricant, visible as metallic particles during oil changes, accelerating wear on the 2094106010: SHIFT SYSTEM.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0501.007.522 |
| Material | Hardened steel with sintered bronze friction cone |
| Outer Diameter | 120 mm (estimated) |
| Inner Diameter | 65 mm (estimated) |
| Thickness | 28 mm (estimated) |
| Weight | 0.85 kg (1.87 lbs) |
| OEM Reference | ZF 0501.007.522 |
| Production Standard | DIN/ISO 9001 certified |
Compatibility
This synchronizer is designed for ZF heavy-duty powershift transmissions commonly found in wheel loaders, graders, and dump trucks. Compatible models include the ZF WG180, ZF WG200, and ZF WG210 series. It also fits select ZF 4WG-200 and ZF 6WG-250 transmissions used in construction machinery from manufacturers like Liebherr, Caterpillar, and Volvo. Always verify your transmission serial number before ordering, as variations exist between early and late production runs.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 2094104412 | MAIN SHAFT | Transfers torque from synchronizer to output gears |
| 2094304054 | MAIN SHAFT | Secondary shaft supporting gear cluster alignment |
| 2094106010 | SHIFT SYSTEM | Actuates synchronizer movement via shift forks |
| 2094206001 | GEARSHIFT SHAFT | Connects shift lever to shift system assembly |
| 2094306053 | GEARSHIFT SHAFT | Alternate shaft variant for WG200 transmissions |
| 0630513070 | SNAP RING | Secures synchronizer hub axial position |
| 2094306019 | WASHER | Thrust washer for synchronizer end-play control |
| 0732040444 | COMPRESSION SPRING | Provides preload for synchronizer detent mechanism |
| 0732040728 | COMPRESSION SPRING | Heavy-duty spring for high-torque applications |
| 2093206001 | BUSH | Wear sleeve for gearshaft support |
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