Overview
The ZF 4644.306.161 COVER PLATE is a precision-engineered OEM genuine component designed for the WG180 and WG200 series transmissions. This part serves as a critical sealing and protective barrier, securing the internal hydraulic and mechanical assemblies within the transmission housing. By maintaining proper fluid containment and preventing external contamination, the cover plate ensures consistent clutch engagement and torque delivery. The SKU 4644.306.161 is a direct replacement for factory-installed units, guaranteeing a perfect fit and long service life. It is often installed in conjunction with the 4644101043 TRANSMISSION HOUSING or the 4644301194 TRANSMISSION HOUSING to complete the main structural assembly.
Symptoms of Failure
When the ZF 4644.306.161 cover plate degrades, operators may notice several distinct performance issues. Oil seepage around the transmission casing is a primary indicator, often appearing as a thin film of fluid near the cover plate mounting points. Intermittent gear slippage under load can occur if the plate warps, allowing internal pressure loss. Another common symptom is contaminated transmission fluid due to debris ingress through a compromised seal. Finally, abnormal whining or grinding noises from the gearbox may signal that the cover plate has loosened, affecting bearing alignment. These failure modes are frequently linked to worn sealing rings, such as the 0634801098 SEALING RING or the 0634801250 SEALING RING, which should be inspected simultaneously.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4644.306.161 |
| Material | High-strength aluminum alloy (die-cast) |
| Overall Dimensions (L x W x H) | 210 mm x 140 mm x 12 mm |
| Weight | 0.85 kg (1.87 lbs) |
| OEM Reference | ZF 4644.306.161 |
| Surface Treatment | Anodized corrosion protection |
| Mounting Holes | 6 x M8 threaded bores |
Compatibility
This cover plate is specifically engineered for the ZF WG180 and ZF WG200 series transmissions, which are commonly used in heavy-duty construction, agricultural, and material handling equipment. It is compatible with both standard and high-torque variants of these models. The part interfaces directly with the main housing and requires the use of 0636305026 SCREW PLUG or 0636305019 SCREW PLUG for sealing access ports. For identification purposes, the 0730365067 TYPE PLATE is often affixed nearby, and the assembly is secured using 0631311009 GROOVED STUD fasteners.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644101043 | TRANSMISSION HOUSING | Main structural casing for gear assembly |
| 4644301194 | TRANSMISSION HOUSING | Alternate housing variant for WG series |
| 0730365067 | TYPE PLATE | Identification tag with transmission specs |
| 0631311009 | GROOVED STUD | Threaded fastener for housing assembly |
| 4644303060 | COVER PLATE | Alternate cover plate variant |
| 4644303061 | COVER PLATE | Alternate cover plate variant |
| 0634801098 | SEALING RING | Prevents fluid leakage at joints |
| 0634801250 | SEALING RING | High-temp sealing ring for cover plate |
| 0636305026 | SCREW PLUG | Seals hydraulic test ports |
| 0636305019 | SCREW PLUG | Alternative plug for drain/fill holes |
