Overview
The ZF 4646.199.064 LOOSE PARTS kit is a critical service component designed specifically for the WG 250 series transmission. This OEM genuine assembly contains the essential fasteners, seals, and positioning elements required to secure internal clutch packs and valve body assemblies within the transmission housing. As a precision-engineered set, the SKU 4646.199.064 ensures that all loose components maintain correct axial clearance and torque retention during high-load operations. Without this kit, the transmission’s internal architecture cannot maintain structural integrity, leading to misalignment of the TRANSMISSION HOUSING and potential damage to adjacent assemblies.
Symptoms of Failure
When the ZF 4646.199.064 LOOSE PARTS begin to degrade or are missing from the assembly, operators will notice distinct operational failures. The most common symptom is intermittent gear slippage under load, particularly during upshifts between second and third gear. A second indicator is audible rattling from the transmission bell housing during idle, caused by loose fasteners vibrating against the HOUSING. Third, hydraulic fluid seepage around the shift cylinder ports occurs when the kit’s sealing elements fail, leading to gradual pressure loss. Finally, erratic shift timing—where the transmission hesitates before engaging reverse—often points to worn positioning pins within this loose parts set.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4646.199.064 |
| OEM Reference | ZF WG 250 Series |
| Material Composition | Hardened Steel / Nitrile Rubber Seals |
| Weight (Kit) | 0.85 kg (1.87 lbs) |
| Fastener Torque Spec | 45 Nm ± 5 Nm |
| Temperature Range | -30°C to +120°C |
| Compatible Housing | 4646101066 |
| Associated Cover | 4646301251 |
| Mounting Hardware | 0636015304 |
Compatibility
This LOOSE PARTS kit is engineered for the ZF WG 250 transmission series, but its application extends to several closely related models. It is directly compatible with the WG180, WG200, and WG250 series, as these share identical internal fastener patterns and seal geometries. The kit also fits the WG150 series when used with the appropriate COVER adapter. For the WG300 series, the kit is partially compatible, requiring substitution of the HEXAGON SCREW with a longer variant. Always verify the housing casting number against the TRANSMISSION HOUSING before installation to ensure correct fitment.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4646101066 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4646301228 | HOUSING | Secondary housing for valve body |
| 4646301251 | COVER | Seals the clutch pack access port |
| 0636015304 | HEXAGON SCREW | M10 x 30mm mounting bolt |
| 0636101828 | CAP SCREW | M8 x 20mm socket head fastener |
| 4646301100 | COVER SHEET | Thin gasket for oil channel sealing |
| 4646301217 | COVER SHEET | Reinforced gasket for high-pressure zones |
| 4646201007 | SCREEN SHEET | Filter mesh for hydraulic fluid |
| 0730365125 | TYPE PLATE | Identification tag with serial number |
| 0631311009 | GROOVED STUD | Alignment pin for housing mating |
