Overview
The ZF 4616.000.275 4 WG 65 Powershift Transmission Assembly is a complete, factory-matched unit designed for heavy-duty off-highway applications. This assembly integrates the main gear cluster, clutch packs, and hydraulic control circuits into a single, ready-to-install package. As a core component of the WG 65 Series, it manages torque distribution across four forward and reverse speeds. The SKU 4616.000.275 is a direct replacement for original ZF units, ensuring precise gear engagement under high load conditions. This complete assembly eliminates the need for piecemeal rebuilding, reducing downtime for equipment such as loaders, graders, and material handlers.
Symptoms of Failure
- Delayed or harsh engagement: When the transmission hesitates before shifting into gear or slams into drive, internal clutch pack wear or hydraulic pressure loss is likely. This often manifests as a “clunk” during directional changes.
- Oil leaks at the housing seam: External fluid seepage around the main case joint indicates degraded gaskets or seal rings. Left unchecked, this leads to low fluid levels and eventual gear slipping.
- Erratic shifting under load: The transmission may hunt between gears or fail to hold a selected ratio when the machine is under heavy drawbar pull. This points to worn valve bodies or solenoid malfunctions.
- Whining or grinding noises: A high-pitched whine from the center housing, particularly in lower gears, suggests bearing fatigue or gear tooth damage within the assembly.
Technical Specifications
| Specification | Detail |
|---|---|
| OEM Part Number | 4616.000.275 |
| Series | WG 65 |
| Assembly Type | Complete Powershift Transmission |
| Dry Weight (approx.) | 185 kg (408 lbs) |
| Housing Material | High-tensile cast iron |
| Input Torque Capacity | 650 Nm (479 lb-ft) |
| Number of Speeds | 4 Forward / 4 Reverse |
| Hydraulic Control Type | Electro-hydraulic with integrated valve body |
| Seal Type | Viton (FKM) for high-temperature resistance |
| Related Valve Assembly | 4616105416: VALVE |
| Related Solenoid | 0501319251: SOLENOID VALVE |
| Related Plug | 0636302013: SCREW PLUG |
| Related Seal | 0634801038: SEALING RING |
Compatibility
This complete unit is engineered for the ZF WG 65 Series, which includes the WG65, WG80, and WG100 models commonly found in compact construction equipment. While the 4616.000.275 is specific to the 4-speed variant, it shares hydraulic architecture with the WG180 and WG200 series. For proper fitment, always verify the bellhousing pattern and output flange configuration. When servicing this assembly, ensure the 4616105416: VALVE is inspected for spool wear, and the 0501319251: SOLENOID VALVE is tested for electrical resistance. Additionally, replace the 0636302013: SCREW PLUG and 0634801038: SEALING RING during installation to prevent fluid loss.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616105416 | VALVE | Hydraulic control spool for clutch modulation |
| 0501319251 | SOLENOID VALVE | Electro-hydraulic actuator for shift timing |
| 0636302013 | SCREW PLUG | Seals hydraulic test ports |
| 0634801038 | SEALING RING | Prevents oil bypass at plug interfaces |
| 4616305078 | CONSOLE | Mounting bracket for valve body |
| 0636010047 | HEXAGON SCREW | Fastener for housing assembly |
| 0636101020 | CAP SCREW | High-strength bolt for clutch pack retention |
| 0630001010 | WASHER | Load distribution under fasteners |
| 0637006015 | HEXAGON NUT | Locking nut for shaft retention |
| 0637842523 | SCREW-IN SLEEVE | Alignment dowel for transmission-to-engine mating |
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