Overview
This ZF 4656.054.026 4 WG 160 Powershift Transmission Assembly is a complete, factory-matched unit designed for heavy-duty industrial applications. As the core hydraulic-mechanical assembly in the WG 160 series, it integrates the torque converter, planetary gear sets, and clutch packs into a single, ready-to-install package. The SKU 4656.054.026 is the direct replacement for original equipment transmissions in wheel loaders, forklifts, and material handlers, ensuring precise shift modulation and high torque capacity. This assembly sits between the engine flywheel and the final drive, managing power distribution through four forward and three reverse speeds. For a full rebuild, this unit must be paired with a robust TRANSMISSION HOUSING to maintain structural integrity under load.
Symptoms of Failure
- Delayed or harsh engagement: When the internal clutch packs wear, operators experience a noticeable lag or jarring shift between forward and reverse gears. This “ZF transmission slipping under load” symptom often requires immediate replacement of the complete assembly.
- External oil leaks at the bell housing: Deteriorating seals within the 4656.054.026 unit cause hydraulic fluid to weep from the front section. Look for pooling oil near the HOUS.FRONT SECT interface.
- Overheating during low-speed operation: A failing torque converter stator or worn clutches generate excessive heat, triggering thermal warnings. This “powershift transmission overheating” issue reduces machine productivity.
- Loss of power in higher gears: Internal leakage past the piston seals causes pressure drop, resulting in “WG 160 transmission no drive” conditions in 3rd or 4th gear.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 4656.054.026 |
| Assembly Type | Complete Powershift Unit (4 WG 160) |
| Dry Weight (approx.) | 185 kg (408 lbs) |
| Overall Length | 620 mm |
| Housing Material | High-Strength Aluminum Alloy |
| Max Input Torque | 1,600 Nm |
| Fluid Capacity | 12.5 Liters (with torque converter) |
| Related Fastener | CAP SCREW (M12 x 1.5) |
| Oil Screen | SCREEN SHEET (fine mesh) |
Compatibility
This 4656.054.026 assembly is engineered for the ZF WG 160 series, but its internal components are shared across multiple ZF powershift platforms. It is directly compatible with WG 160, WG 180, and WG 200 transmissions found in industrial vehicles from 2010 onward. The rear housing interface matches the HOUSING REAR PART (4656201036) and the alternative HOUSING REAR PART (4472239179) for specific OEM variants. Always verify bell housing bolt patterns before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101031 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4656201075 | HOUS.FRONT SECT | Front bell housing adapter |
| 4656201036 | HOUSING REAR PART | Rear output housing |
| 4472239179 | HOUSING REAR PART | Alternate rear housing variant |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing mating |
| 4656301148 | FIXING PLATE | Secures clutch piston assembly |
| 0636100817 | CAP SCREW | High-tensile housing bolt |
| 4656301016 | SCREEN SHEET | Oil filter screen (fine) |
| 4656301017 | SCREEN SHEET | Oil filter screen (coarse) |
| 0636100803 | CAP SCREW | M10 housing bolt |
Frequently Asked Questions
Q: Can the 4656.054.026 be rebuilt, or must it be replaced as a complete unit?
A: While individual clutch packs and seals are serviceable, the 4 WG 160 assembly is factory-balanced. For maximum reliability, we recommend replacing the complete unit, especially if the TRANSMISSION HOUSING shows signs of wear.
Q: What is the typical lifespan of this powershift transmission assembly?
A: In normal industrial use with proper fluid changes, the 4656.054.026 can last 8,000–10,000 hours. Early failure is often caused by contaminated oil bypassing the SCREEN SHEET.
Q: Does this unit include the torque converter?
A: Yes, the complete assembly includes the integrated torque converter. You will only need to add the external CAP SCREW set for mounting.
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Phone: +86 158 2286 3467 |
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