Overview
The ZF 4656.054.029 4 WG 160 Powershift Transmission Assembly is a complete, factory-grade unit designed for heavy-duty off-highway machinery. This assembly integrates the main gear cluster, clutch packs, and hydraulic control components into a single, ready-to-install package. As a core replacement for the WG 160 series, the SKU 4656.054.029 directly governs torque distribution and speed shifting under high load conditions. It sits centrally within the drivetrain, connecting the engine output to the final drive. For a full rebuild, this unit must be paired with a robust TRANSMISSION HOUSING to ensure structural integrity under extreme stress.
Symptoms of Failure
- Erratic gear engagement or slipping: When the 4656.054.029 assembly wears, internal clutch packs fail to hold pressure, causing the machine to lurch or lose drive under load.
- Hydraulic fluid contamination: Debris from worn friction plates circulates through the system, often visible as metallic particles in the oil filter or sump.
- Delayed or harsh shifting: A failing unit produces a noticeable lag between gear changes, accompanied by a hard “clunk” as the transmission finally engages.
- External oil seepage: Cracks or seal failures in the assembly lead to fluid leaks around the bell housing or output flange, often mistaken for engine oil loss.
Technical Specifications
| Parameter | Specification |
|---|---|
| OEM Part Number | 4656.054.029 |
| Assembly Type | Complete Powershift Unit (4 WG 160) |
| Dry Weight (approx.) | 185 kg (408 lbs) |
| Overall Length | 620 mm |
| Overall Width | 480 mm |
| Overall Height | 510 mm |
| Housing Material | High-grade cast iron (GGG-40) |
| Clutch Plate Material | Sintered bronze on steel |
| Max Input Torque | 1,600 Nm |
| OEM Reference | ZF 4 WG 160 Series |
Compatibility
This complete unit is engineered for the ZF WG 160 transmission family. It is directly compatible with the WG 160, WG 180, and WG 200 models found in loaders, graders, and industrial tractors. The assembly also fits select variants of the WG 150 and WG 250 series when used with the correct adapter kit. For a secure installation, always verify the condition of the HOUS.FRONT SECT and the HOUSING REAR PART before mounting. In some configurations, the HOUSING REAR PART (alternate casting) may be required for specific output flange orientations.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101031 | TRANSMISSION HOUSING | Main structural casing for gear and shaft support |
| 4656201075 | HOUS.FRONT SECT | Front section housing the input shaft and pump drive |
| 4656201036 | HOUSING REAR PART | Rear casing for output shaft and PTO mounting |
| 4472239179 | HOUSING REAR PART | Alternate rear housing casting for specific models |
| 0631306816 | CYLINDRICAL PIN | Alignment pin for housing-to-housing doweling |
| 4656301148 | FIXING PLATE | Locks bearing and gear positions on the shaft |
| 0636100817 | CAP SCREW | High-tensile fastener for housing bolt joints |
| 4656301016 | SCREEN SHEET | Fine mesh filter for hydraulic return line |
| 4656301017 | SCREEN SHEET | Coarse mesh pre-filter for sump suction |
| 0636100803 | CAP SCREW | Fastener for valve body and cover plates |
Frequently Asked Questions
Q: Can the 4656.054.029 be installed without replacing the housing?
A: Yes, but only if the existing housing is free of cracks and wear. We strongly recommend inspecting the TRANSMISSION HOUSING for stress fractures before reuse.
Q: What is the typical service life of this complete assembly?
A: Under normal operating conditions with regular oil changes, the unit lasts 8,000 to 12,000 hours. Harsh environments or contamination can reduce this significantly.
Q: Does this part include the valve body and solenoids?
A: No, the 4656.054.029 is the mechanical assembly only. Hydraulic control components must be ordered separately.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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