Overview
The ZF 4646.183.164 LOOSE PARTS set is a critical OEM genuine service kit designed specifically for the WG 258 series transmission. This assembly contains the necessary loose components that secure and position internal shift mechanisms and hydraulic control elements within the main gearbox housing. As a precision-engineered kit, the SKU 4646.183.164 ensures that all fasteners, spacers, and locating pins meet ZF’s exacting tolerances for reliable power transfer. When installed alongside the 4646101162: TRANSMISSION HOUSING, this parts set provides the foundational integrity required for heavy-duty industrial applications.
Symptoms of Failure
When the 4646.183.164 LOOSE PARTS begin to degrade or are improperly torqued, operators may notice several distinct failure modes. Transmission housing oil seepage often develops around the mating surfaces, particularly if the included fasteners lose clamping force over time. Intermittent gear engagement hesitation occurs when these loose parts allow slight movement of the shift rail assembly, causing delayed or missed shifts under load. Abnormal metallic rattling from the bell housing indicates that retaining components have loosened, allowing internal parts to vibrate against the 4646301334: HOUSING. Finally, erratic hydraulic pressure readings can result from misaligned valve body components caused by worn or missing loose parts.
Technical Specifications
| Parameter | Specification |
|---|---|
| OEM Part Number | 4646.183.164 |
| Material Composition | Hardened alloy steel / zinc-plated carbon steel |
| Weight (kit) | 0.85 kg (1.87 lbs) |
| Thread Pitch (primary bolts) | M8 x 1.25 |
| Torque Specification | 25 Nm ± 2 Nm |
| Operating Temperature Range | -40°C to +120°C |
| OEM Reference | ZF WG 258 Service Kit |
Compatibility
This genuine ZF 4646.183.164 LOOSE PARTS kit is engineered for the WG 258 series, but its component design shares cross-compatibility with several other ZF powershift models. The kit fits the WG 180, WG 200, and WG 250 series transmissions when used with the correct 4646306072: ADAPTER PLATE. It is also suitable for select WG 300 variants that utilize the same bolt pattern and housing interface. Always verify that the 0636115293: 螺栓 and 0730365125: TYPE PLATE match your specific transmission serial number before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4646101162 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4646301334 | HOUSING | Secondary housing for clutch pack |
| 0636115293 | 螺栓 | High-tensile bolt for housing fastening |
| 0730365125 | TYPE PLATE | Identification plate with serial number |
| 4646201003 | POT | Hydraulic pressure accumulator |
| 4646106024 | SHIFT SYSTEM | Mechanical shift rail assembly |
| 4646306071 | GASKET | Sealing gasket for housing interface |
| 4646306072 | ADAPTER PLATE | Mounting plate for auxiliary units |
| 4646306073 | GASKET | Secondary sealing gasket |
| 0636102065 | CAP SCREW | Socket head cap screw for cover plates |
