Overview
The ZF 4657.054.021 4 WG 210 Powershift Transmission Assembly represents a complete, factory-grade unit designed for heavy-duty off-highway machinery. This assembly serves as the central power distribution hub within the WG 210 series, managing torque conversion and clutch engagement for smooth gear shifts under extreme loads. As a complete unit, SKU 4657.054.021 replaces the entire gear train and hydraulic control system, eliminating the need for piecemeal repairs. It integrates directly with the TRANSMISSION HOUSING to form a sealed, pressurized oil circuit that drives the planetary gearsets.
Symptoms of Failure
- Delayed or harsh engagement: When the complete unit wears, operators experience a noticeable lag between shifting and power delivery, often accompanied by a jarring clunk. This indicates internal clutch pack wear or hydraulic pressure loss within the assembly.
- Chronic oil leaks at the housing seam: A failing unit often causes fluid seepage where the HOUS.FRONT SECT meets the main body, leading to low fluid levels and eventual overheating.
- Gear slipping under load: As internal seals degrade, the transmission fails to hold torque, causing the machine to lose power on inclines or during heavy digging operations.
- Unusual whining or grinding noises: Worn bearings or damaged planetary gears produce metallic sounds that intensify with engine RPM, signaling imminent catastrophic failure.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Number | 4657.054.021 |
| Assembly Type | Complete Powershift Unit (4 WG 210) |
| Dry Weight | Approx. 185 kg (408 lbs) |
| Housing Material | High-grade cast iron (GGG-40) |
| Overall Length | 720 mm |
| Overall Width | 480 mm |
| Overall Height | 510 mm |
| OEM Reference | ZF 4657.054.021 |
| Bolt Torque Spec | 120 Nm (M12 cap screws) |
Compatibility
This complete unit is engineered for the ZF WG 210 series, but it also fits select models in the WG 180 and WG 200 families due to shared bolt patterns and shaft dimensions. Specifically, it is compatible with the 4 WG 210, 4 WG 200, and 4 WG 180 transmissions found in loaders, graders, and industrial tractors. For proper sealing, always pair this assembly with a new CYLINDRICAL PIN and the HOUSING REAR PART to ensure alignment integrity.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101033 | TRANSMISSION HOUSING | Main structural casing for gear assembly |
| 4657201027 | HOUS.FRONT SECT | Front section housing pump drive |
| 4657201012 | HOUSING REAR PART | Rear section supporting output shaft |
| 0631306792 | CYLINDRICAL PIN | Alignment dowel for housing halves |
| 0636100801 | CAP SCREW | M12 fastener for housing joints |
| 4656301148 | FIXING PLATE | Locks clutch pack in position |
| 4657301032 | SCREEN SHEET | Fine mesh filter for oil circuit |
| 4657301033 | SCREEN SHEET | Coarse mesh pre-filter |
| 0636100803 | CAP SCREW | M10 fastener for cover plates |
| 4681301040 | OIL FEED.HOUSG. | Pressurized oil distribution manifold |
Frequently Asked Questions
Q: Can I install this complete unit without replacing the housing?
A: Yes, but we strongly recommend inspecting the TRANSMISSION HOUSING for cracks or warping. A damaged housing will compromise the new assembly’s alignment and cause premature failure.
Q: What is the typical lifespan of the 4657.054.021 unit?
A: Under normal operating conditions with proper fluid maintenance, this assembly lasts 8,000 to 12,000 hours. Symptoms like slipping or leaks usually appear after 10,000 hours.
Q: Do I need special tools to replace this assembly?
A: Yes, you will need a transmission jack and a torque wrench. You must also replace the CYLINDRICAL PIN and all CAP SCREW fasteners to ensure proper clamping force.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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