Overview
The ZF 4646.152.535 COUPLING is a precision-engineered OEM sub-assembly designed for the WG 250, WG 260, and WG 310 series transmissions. This coupling serves as the critical mechanical link between the transmission housing and the shift system, ensuring torque transfer and alignment during gear engagement. As a factory-spec replacement, the SKU 4646.152.535 directly interfaces with the 4646101162: TRANSMISSION HOUSING and the 4646301334: HOUSING to maintain driveline integrity. Without this coupling, the transmission cannot properly synchronize rotational forces, leading to premature wear on adjacent components.
Symptoms of Failure
- Oil leaks around the coupling housing: When the 4646.152.535 coupling wears, hydraulic fluid escapes past the seal interface, leaving visible drips under the bell housing.
- Gear slipping under load: A degraded coupling fails to maintain positive engagement, causing the transmission to slip out of gear during acceleration or hill climbs.
- Abnormal vibration or chatter: Worn splines or misalignment produce a distinct metallic chatter at low RPM, often mistaken for bearing noise.
- Delayed engagement when shifting: Operators report a hesitation of 1-2 seconds before the transmission responds, indicating coupling backlash.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4646.152.535 |
| Material | Hardened alloy steel (42CrMo4 equivalent) |
| Weight | 2.8 kg (6.2 lbs) |
| Outer Diameter | 152 mm |
| Inner Spline Count | 24-tooth involute |
| OEM Reference | ZF 4646.152.535 |
| Torque Capacity | 1,200 Nm (885 lb-ft) |
Compatibility
This coupling is engineered for the ZF WG series powershift transmissions. It is a direct fit for the WG 258, WG 260, WG 261, WG 310, and WG 311 series. The part also integrates with the 0636115293: 螺栓 (bolt) and 0730365125: TYPE PLATE for proper mounting and identification. While primarily used in WG250/WG260/WG310 platforms, it may also serve WG180 and WG200 variants with adapter modifications.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4646101162 | TRANSMISSION HOUSING | Encloses and supports the gear train |
| 4646301334 | HOUSING | Secondary housing for clutch pack assembly |
| 0636115293 | 螺栓 | M10x1.5 bolt for coupling retention |
| 0730365125 | TYPE PLATE | Identification plate with serial number |
| 4646201003 | POT | Hydraulic pressure accumulator |
| 4646106024 | SHIFT SYSTEM | Valve body for gear selection |
| 4646306071 | GASKET | Seal between housing and coupling |
| 4646306072 | ADAPTER PLATE | Mounting plate for shift system |
| 4646306073 | GASKET | Secondary seal for adapter plate |
| 0636102065 | CAP SCREW | M8x1.25 fastener for housing |
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