Overview
The ZF 4646.183.285 LOOSE PARTS for WG310 is an OEM genuine component engineered to secure and stabilize critical internal assemblies within the WG 310 series transmission. This part functions as a precision-machined retaining element, ensuring that valve blocks, connecting housings, and pressure regulators remain firmly seated under high-torque conditions. As a loose parts kit, it includes all necessary fasteners and spacers to maintain exacting tolerances during gear shifts. The SKU 4646.183.285 is specifically designed to interface with the WG310’s hydraulic control unit, preventing axial movement that could lead to pressure loss or mechanical interference. When installing this component, always pair it with the 0636115293 螺栓 and 0736300232 螺栓 to achieve the specified clamping force. Additionally, the 4475280208 SCREW PLUG and 0634316523 O-RING are required to seal the assembly against fluid ingress.
Symptoms of Failure
When the ZF 4646.183.285 LOOSE PARTS begins to degrade, operators may notice distinct operational issues. Oil leaks around the valve block interface are a primary indicator, often caused by loosened fasteners that compromise sealing surfaces. Intermittent gear slipping under load occurs when the retaining elements fail to hold the pressure regulator in place, leading to erratic hydraulic pressure. Unusual metallic rattling from the transmission housing signals that loose parts are vibrating against adjacent components, accelerating wear. Delayed engagement when shifting from neutral to drive is another common symptom, as misaligned connecting housings disrupt oil flow paths. These failure modes are frequently searched by technicians diagnosing WG310 transmission issues.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4646.183.285 |
| Material | Hardened alloy steel with zinc-nickel plating |
| Weight | 0.45 kg (1.0 lb) |
| Dimensions | 85 mm x 45 mm x 25 mm |
| OEM Reference | ZF 4646.183.285 |
| Thread Pitch | M10 x 1.5 (primary fasteners) |
| Torque Spec | 45 Nm ± 5 Nm |
| Operating Temp Range | -40°C to 120°C |
Compatibility
This genuine ZF part is primarily designed for the WG 310 series, but it also fits select models in the WG180, WG200, and WG250 families due to shared hydraulic module architecture. The 4646.183.285 LOOSE PARTS is compatible with transmissions manufactured after 2015 that utilize the modular valve block design. For precise fitment verification, cross-reference your transmission’s serial number with ZF’s OEM catalog. When servicing WG310 units, always inspect the 4656306171 VALVE BLOCK and 4656306190 CONNECTING HOUSING for wear, as these components work in tandem with the loose parts kit. The 0501213997 PRESSURE REGULATOR and 0736300094 TORX SCREW are also commonly replaced during the same service interval.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 0636115293 | 螺栓 | Secures valve block to housing |
| 0736300232 | 螺栓 | Fastens connecting housing assembly |
| 4475280208 | SCREW PLUG | Seals hydraulic test ports |
| 0634316523 | O-RING | Prevents fluid leakage at joints |
| 4656306171 | VALVE BLOCK | Directs hydraulic flow to clutches |
| 4656306190 | CONNECTING HOUSING | Links valve block to transmission case |
| 0501213997 | PRESSURE REGULATOR | Maintains consistent hydraulic pressure |
| 0736300094 | TORX SCREW | High-torque fastener for critical joints |
| 4475280047 | SCREW-IN SLEEVE | Provides threaded reinforcement in aluminum housings |
| 0634306010 | O形圈 | Seals screw-in sleeve against pressure loss |
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