Overview
The ZF 4646.199.047 LOOSE PARTS set is a critical OEM genuine service kit engineered specifically for the WG 250 Series transmission. This assembly consolidates essential fasteners and sealing components that secure the transmission housing and cover assemblies, ensuring proper clamping force and preventing fluid migration between internal chambers. As a loose parts kit, it replaces worn or damaged hardware during a major overhaul or rebuild of the WG250 gearbox. The SKU 4646.199.047 is factory-matched to ZF’s exacting tolerances, guaranteeing that every bolt and washer meets the original torque specifications for long-term reliability in heavy-duty industrial applications.
Symptoms of Failure
When the components within the 4646.199.047 LOOSE PARTS kit degrade, operators often notice oil seepage around the transmission housing mating surfaces, particularly where the TRANSMISSION HOUSING meets the HOUSING assembly. Another common failure symptom is intermittent gear slippage under load, caused by insufficient clamping force from fatigued hexagon screws that allow internal components to shift. Technicians may also detect abnormal vibration or rattle during neutral-to-drive engagement, indicating loose cover plates. Finally, visible corrosion or stripped threads on mounting points around the COVER area signal that the loose parts set requires immediate replacement to avoid catastrophic internal damage.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4646.199.047 |
| OEM Reference | ZF WG250 Series |
| Material Composition | Alloy Steel (Grade 10.9) / Zinc-Plated |
| Weight (Kit) | 0.85 kg (1.87 lbs) |
| Thread Pitch | M10 x 1.5 (primary fasteners) |
| Torque Specification | 65 Nm ± 5 Nm (dry) |
| Included Items | Hexagon screws, washers, lock plates |
Compatibility
This LOOSE PARTS kit is primarily designed for the ZF WG 250 Series transmission, but it also cross-references to earlier WG180 and WG200 models that share the same fastener pattern. The kit is compatible with all WG250 variants, including those with integrated retarders or power take-off (PTO) units. For proper installation, always pair this kit with a new HEXAGON SCREW set to ensure uniform clamping across the entire housing interface. Do not reuse old fasteners from previous rebuilds, as metal fatigue compromises sealing integrity.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4646101029 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4646301090 | HOUSING | Intermediate housing for clutch pack |
| 4646301087 | COVER | Seals rear access port |
| 0636015304 | HEXAGON SCREW | Primary housing fastener |
| 0636101828 | CAP SCREW | Secures cover plate |
| 4646301102 | COVER SHEET | Thin gasket plate for oil sealing |
| 4646301235 | COVER SHEET | Secondary gasket for valve body |
| 0730365067 | TYPE PLATE | Identification tag for transmission |
| 0631311009 | GROOVED STUD | Alignment dowel for housing |
| 0636101193 | CAP SCREW | Fastener for oil pan attachment |
