Overview
This genuine ZF 4656.073.014 3 WG 171 Powershift Transmission Assembly is a complete, factory-sealed unit designed for heavy-duty off-highway applications. As the core hydraulic-mechanical assembly in the WG 171 series, it integrates the torque converter, planetary gear sets, and clutch packs into a single, ready-to-install package. The SKU 4656.073.014 replaces the need for individual component rebuilding, ensuring precise shift timing and full power transfer under extreme loads. It sits directly between the engine flywheel housing and the final drive, converting engine torque into controlled, multi-speed output. This assembly is the primary replacement for machines experiencing total transmission failure or requiring a full powertrain overhaul.
Symptoms of Failure
- Delayed or harsh engagement when shifting from neutral to forward: Worn internal clutch packs and seals within the 4656.073.014 cause pressure loss, resulting in a noticeable lag or a jarring “clunk” during gear changes.
- Complete loss of forward or reverse drive: A failed torque converter or broken planetary gear set inside this assembly will stop all power transmission, leaving the machine immobile despite engine operation.
- Contaminated transmission fluid with metallic debris: Internal wear of the TRANSMISSION HOUSING or bearing surfaces generates fine metal particles that circulate through the system, often visible on the dipstick.
- Overheating under light load: A failing pump or blocked internal passages cause the transmission to run hot (above 120°C), often accompanied by a burnt odor from the fluid.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 4656.073.014 |
| Assembly Type | Complete Powershift Transmission (3 WG 171) |
| Dry Weight (approx.) | 185 kg (408 lbs) |
| Overall Length | 620 mm |
| Overall Width | 480 mm |
| Overall Height | 510 mm |
| Housing Material | High-strength cast iron (GGG-40) |
| OEM Reference | ZF 3 WG 171 |
| Max Input Torque | 1,200 Nm |
| Number of Speeds | 3 Forward / 3 Reverse |
Compatibility
This 4656.073.014 assembly is specifically engineered for the ZF WG 171 series. It is directly compatible with WG 171, WG 180, and WG 200 transmission models used in telescopic handlers, wheel loaders, and agricultural tractors from manufacturers such as JCB, Manitou, and Claas. It also fits select variants of the WG 150 series with identical bellhousing patterns. Always verify the transmission serial number against the original equipment manufacturer’s parts list before installation.
During installation, the TRANSMISSION HOUSING (4656101028) must be inspected for cracks, while the HOUS.FRONT SECT (4656301066) provides the critical mounting face for the torque converter. The SCREEN SHEET (4656201015) filters debris from the oil pump intake, and the TUBE (4656301037) routes pressurized oil to the clutch valves. These components are essential for the proper function of the complete assembly.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101028 | TRANSMISSION HOUSING | Main structural casing that encloses all rotating components |
| 4656301066 | HOUS.FRONT SECT | Front section housing the torque converter and input shaft |
| 4656201015 | SCREEN SHEET | Fine mesh filter protecting the hydraulic pump from debris |
| 4656301037 | TUBE | Internal oil delivery tube for clutch pack lubrication |
| 0634313514 | O-RING | Seals the oil tube connections to prevent external leaks |
| 0636100803 | CAP SCREW | M10 fastener securing the housing sections together |
| 4656301042 | HOUSING REAR PART | Rear casing supporting the output shaft and PTO drive |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for precise housing assembly |
| 0636100801 | CAP SCREW | M12 bolt for high-torque flange connections |
| 0636100160 | CAP SCREW | M8 screw for valve body and cover plate mounting |
Frequently Asked Questions
Q: Can I install this 4656.073.014 assembly without replacing the torque converter?
A: No. This complete unit includes the torque converter as an integrated component. Attempting to reuse an old converter with this new assembly will cause immediate seal failure and void the warranty.
Q: Does this transmission assembly come pre-filled with oil?
A: No. The unit is shipped dry. You must fill it with the correct ZF-approved transmission fluid (typically TE-ML 05 or 07 specification) after installation, following the dipstick procedure for the specific machine model.
Q: What is the typical lifespan of this WG 171 assembly in a wheel loader?
A: Under normal operating conditions with proper maintenance, this assembly can last 8,000 to 12,000 hours. Regular oil changes every 500 hours and replacing the O-RING (0634313514) during service are critical for longevity.
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Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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