Overview
The ZF 4656.073.019 3 WG 171 Powershift Transmission Assembly is a complete, remanufactured unit designed for heavy-duty off-highway applications. This assembly integrates the main gear cluster, clutch packs, and hydraulic control system into a single, ready-to-install package. As a full replacement for the WG 171 series, it eliminates the need for piecemeal repairs. The SKU 4656.073.019 is a direct drop-in unit that restores original ZF shift quality and torque capacity. Within the transmission, this assembly sits as the central power transfer module, connecting the torque converter to the output shaft via planetary gearsets.
Symptoms of Failure
When the ZF 4656.073.019 assembly begins to fail, operators often notice specific performance issues. Delayed or harsh shifting between forward and reverse gears is a primary indicator of internal clutch wear or hydraulic pressure loss. Another common symptom is transmission overheating under moderate load, caused by worn friction plates generating excessive heat. You may also detect metallic debris in the transmission fluid or on the magnetic drain plug, signaling gear or bearing degradation. Finally, intermittent loss of drive power during uphill operation points to slipping clutches or a failing torque converter lock-up within the assembly.
Technical Specifications
| Specification | Value |
| OEM Part Number | 4656.073.019 |
| Series | WG 171 (3-speed) |
| Assembly Type | Complete Powershift Unit |
| Dry Weight (approx.) | 185 kg (408 lbs) |
| Overall Length | 620 mm |
| Overall Width | 450 mm |
| Overall Height | 480 mm |
| Housing Material | High-Strength Aluminum Alloy |
| Input Torque Rating | 1,200 Nm (885 lb-ft) |
| Fluid Capacity | 12.5 Liters (3.3 Gallons) |
Compatibility
This complete unit is engineered specifically for the ZF WG 171 transmission series. It is also compatible with select variants of the WG 180 and WG 200 series when used with the correct bell housing and torque converter. The assembly fits ZF 3 WG 171 models found in Case, New Holland, and JCB telehandlers and wheel loaders. Always verify your transmission model tag before ordering.
Related Components
When installing the 4656.073.019 assembly, several companion parts are critical for a successful rebuild. The 4656101028 TRANSMISSION HOUSING provides the structural shell for the gear train. Inside, the 4656301066 HOUS.FRONT SECT supports the input shaft bearings. The 4656201015 SCREEN SHEET filters hydraulic fluid entering the valve body, while the 4656301037 TUBE routes lubrication oil to the planetary gears.
| Part Number | Name | Function |
| 4656101028 | TRANSMISSION HOUSING | Main structural casing for gear assembly |
| 4656301066 | HOUS.FRONT SECT | Front section housing input shaft bearings |
| 4656201015 | SCREEN SHEET | Hydraulic fluid filter screen |
| 4656301037 | TUBE | Lubrication oil delivery tube |
| 0634313514 | O-RING | Seals housing joint surfaces |
| 0636100803 | CAP SCREW | Fastens housing sections together |
| 4656301042 | HOUSING REAR PART | Rear section supporting output shaft |
| 0631306816 | CYLINDRICAL PIN | Alignment pin for housing assembly |
| 0636100801 | CAP SCREW | Secures front housing to main case |
| 0636100160 | CAP SCREW | Mounting bolt for rear housing |
Frequently Asked Questions
Q: Does the 4656.073.019 include the torque converter?
A: No, this is the complete powershift assembly only. The torque converter must be ordered separately if needed.
Q: Can I install this unit without replacing the housing?
A: Yes, but we strongly recommend inspecting the TRANSMISSION HOUSING for cracks or wear. A damaged housing will compromise the new assembly.
Q: What fluid is recommended for this assembly?
A: Use ZF TE-ML 03 or 05 approved transmission fluid. Do not use standard ATF.
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Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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