Overview
This ZF 4656.054.073 4 WG 160 Powershift Transmission Assembly is a complete, factory-grade unit designed for heavy-duty off-highway applications. As the core hydraulic-mechanical assembly in the WG 160 series, it manages torque distribution across four forward and reverse speeds. The SKU 4656.054.073 integrates the clutch packs, planetary gear sets, and valve body into a single sealed housing. When rebuilding a WG 160, this complete unit replaces the worn internal rotating assembly, ensuring precise shift timing and full power transfer. It sits directly between the TRANSMISSION HOUSING and the HOUS.FRONT SECT, forming the mechanical heart of the transmission.
Symptoms of Failure
- Erratic gear engagement or slipping under load: Worn clutch discs or seal rings inside the assembly cause delayed shifts or complete loss of drive in specific ranges.
- Internal hydraulic pressure loss: Cracks in the drum or piston bores lead to low clutch apply pressure, resulting in overheating and chattering during direction changes.
- Metallic debris in the oil pan: Bearing or gear spalling from the planetary set contaminates the hydraulic circuit, often accompanied by whining noises from the HOUSING REAR PART area.
- Intermittent neutral condition: A failing one-way clutch or broken snap ring inside the 4656.054.073 causes the transmission to drop into neutral unexpectedly during operation.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 4656.054.073 |
| Assembly Type | Complete Powershift Unit (4 WG 160) |
| Dry Weight (approx.) | 68 kg (150 lbs) |
| Overall Length | 520 mm |
| Housing Material | High-strength cast iron (GGG-40) |
| Clutch Disc Material | Sintered bronze on steel |
| Max Input Torque | 1,600 Nm |
| OEM Reference | ZF 4 WG 160 |
Compatibility
This complete assembly is engineered for the ZF WG 160 series transmissions. It is directly compatible with the 4 WG 160, 4 WG 160 T, and 4 WG 160 E models found in telehandlers, wheel loaders, and industrial tractors. While the WG 180 and WG 200 series share similar architecture, the 4656.054.073 is specifically dimensioned for the WG 160 housing cavity. Always verify the rear housing variant—some units use the HOUSING REAR PART (4472239177) which requires a different output flange.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101032 | TRANSMISSION HOUSING | Main structural casing for the gear train |
| 4656201075 | HOUS.FRONT SECT | Front section enclosing the torque converter |
| 4656201034 | HOUSING REAR PART | Rear housing supporting output shaft bearings |
| 4472239177 | HOUSING REAR PART | Alternate rear housing for PTO configurations |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing mating surfaces |
| 0636100817 | CAP SCREW | M12 fastener for clutch pack retention |
| 4656301016 | SCREEN SHEET | Fine mesh filter for oil return circuit |
| 4656301017 | SCREEN SHEET | Coarse mesh pre-filter for suction line |
| 0636100803 | CAP SCREW | M10 bolt for valve body mounting |
| 4681301040 | OIL FEED.HOUSG. | Lubrication manifold for planetary gears |
Frequently Asked Questions
Q: Can the 4656.054.073 be installed without removing the transmission from the vehicle?
A: No. This complete unit requires full removal of the transmission and separation of the main housing. You must also detach the HOUS.FRONT SECT to access the retaining ring.
Q: What is the typical service life of this assembly in a wheel loader?
A: Under normal operating conditions with proper oil maintenance, the 4 WG 160 unit lasts 8,000–10,000 hours. Failure often begins with debris clogging the SCREEN SHEET (4656301016).
Q: Does this part include the valve body or torque converter?
A: No. The 4656.054.073 is the rotating assembly only. You will need to reuse or replace the valve body, converter, and the OIL FEED.HOUSG. separately.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
Request a Quote →
