Overview
The ZF 4657.055.305 5 WG 210 Powershift Transmission Assembly is a complete, factory-matched unit designed for heavy-duty off-highway applications. This assembly serves as the central power distribution hub within the WG 210 series, managing torque flow across five forward speeds and one reverse range. The SKU 4657.055.305 integrates the main housing, clutch packs, and hydraulic valve body into a single ready-to-install package. When rebuilding or replacing a worn unit, this complete assembly eliminates the need to source individual internal components, ensuring correct gear alignment and hydraulic pressure integrity from the start.
Symptoms of Failure
- Delayed engagement or gear slipping under load: Worn clutch discs or degraded seals inside the 4657.055.305 cause the transmission to hesitate before engaging forward or reverse, particularly when operating on inclines.
- External oil leaks near the front housing interface: Deteriorated gaskets and O-rings around the HOUS.FRONT SECT allow transmission fluid to escape, leading to low pressure and overheating.
- Abnormal whining or grinding noises during shifting: Worn bearings or damaged CYLINDRICAL PIN guides inside the assembly create metallic sounds that worsen as the unit heats up.
- Erratic shift patterns or loss of reverse: Internal hydraulic cross-leaks, often caused by a failed O-RING between valve body sections, disrupt clutch application timing.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 4657.055.305 |
| Series | WG 210 (5-speed powershift) |
| Dry Weight (approx.) | 185 kg (408 lbs) |
| Overall Length | 720 mm |
| Overall Width | 480 mm |
| Overall Height | 510 mm |
| Housing Material | High-grade cast iron (GGG-40) |
| Input Torque Capacity | 2,100 Nm (1,550 ft-lbs) |
| Oil Capacity (system) | 22 liters |
| Mounting Bolts | M16 x 1.5 (8 required) |
Compatibility
This complete assembly is engineered for the ZF WG 210 series, but its core architecture shares mounting patterns and hydraulic logic with the WG 180 and WG 200 families. It directly replaces units in ZF 5 WG 210 configurations found in telescopic handlers, wheel loaders, and rough-terrain forklifts from 2010 onward. The assembly is also backward-compatible with select WG 160 models when using the correct 螺栓 (cap screw) kit for bell housing adaptation. Always verify the clutch pack count (5 forward, 1 reverse) matches your original unit before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657201161 | HOUS.FRONT SECT | Front housing section that mates to engine bellhousing |
| 0636115293 | 螺栓 | M16 cap screw for securing housing halves |
| 0634313603 | O-RING | Hydraulic seal between valve body and housing |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for clutch pack assembly |
| 0636100801 | CAP SCREW | M12 bolt for oil pan retention |
| 4656301148 | FIXING PLATE | Locks clutch piston return spring in place |
| 4657301032 | SCREEN SHEET | Fine mesh filter for main oil circuit |
| 4657301033 | SCREEN SHEET | Coarse mesh pre-filter for pump intake |
| 0636100803 | CAP SCREW | M10 bolt for valve body cover |
| 4656301047 | OIL FEED.HOUSG. | Pressurized oil supply tube to clutch packs |
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