Overview
The ZF 4644.026.298 WENDEGETRIEBE Powershift Transmission Assembly is a complete, factory-grade unit designed for heavy-duty industrial and agricultural machinery. This assembly functions as the primary directional and speed control hub within the WG 200 Series transmission family, enabling seamless forward-reverse shifting under load without clutching. The SKU 4644.026.298 integrates the planetary gearset, clutch packs, and hydraulic valve body into a single, pre-assembled module, reducing installation complexity and downtime. As a direct replacement for worn or failed units, it restores full power transfer efficiency and operational smoothness in wheel loaders, telehandlers, and compactors.
Symptoms of Failure
When the ZF 4644.026.298 assembly begins to degrade, operators will notice distinct performance issues. Delayed engagement when shifting from forward to reverse is a common early indicator, often accompanied by a harsh clunk. Oil leaks around the bell housing or shift cylinder seals signal internal seal wear, leading to low hydraulic pressure and erratic gear changes. Another frequent symptom is slipping under heavy load, where the engine revs rise without corresponding vehicle speed, particularly during uphill travel. Finally, unusual whining or grinding noises from the transmission center section suggest bearing or gear damage within the WENDEGETRIEBE assembly.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number / SKU | 4644.026.298 |
| Assembly Type | Complete WENDEGETRIEBE Powershift Unit |
| Overall Length | 485 mm (19.1 in) |
| Overall Width | 320 mm (12.6 in) |
| Overall Height | 410 mm (16.1 in) |
| Dry Weight | 78 kg (172 lbs) |
| Housing Material | High-Grade Cast Iron (GGG-40) |
| Internal Gear Material | Case-Hardened Alloy Steel (20MnCr5) |
| Seal Material | NBR / FKM (Viton) O-Rings |
| Max Input Torque | 1,200 Nm (885 lb-ft) |
| Max Input Speed | 2,800 RPM |
| Hydraulic Pressure Range | 16–22 bar (232–319 psi) |
| OEM Reference | ZF 4644.026.298 (Original) |
Compatibility
This complete unit is engineered for the ZF WG 200 Series transmission family. It is a direct fit for the following models and their sub-variants:
- ZF WG 180 (all revisions)
- ZF WG 200 (standard and high-torque variants)
- ZF WG 210 (select configurations with 4-speed powershift)
- ZF WG 211 (industrial and forestry applications)
Compatibility extends to machinery originally equipped with these transmissions, including Case, New Holland, JCB, and Liebherr wheel loaders and telehandlers. Always verify the transmission serial number and housing casting code before installation to ensure correct fitment.
