Overview
The ZF 4642.330.217 COVER PLATE is a precision-engineered sealing component designed for the WG 150 series transmission. This OEM genuine part forms the critical barrier on the transmission housing, protecting internal hydraulic circuits and gear assemblies from contamination while retaining essential lubricants. Positioned on the main casing assembly, the SKU 4642.330.217 interfaces directly with the TRANSMISSION HOUSING (4642101109) and the TRANSMISSION HOUSING (4642301205) to ensure a sealed, pressurized environment. Its robust construction withstands high thermal loads and vibration, making it indispensable for maintaining transmission integrity in heavy-duty industrial applications.
Symptoms of Failure
- External oil seepage around the WG150 casing: A degraded cover plate gasket surface leads to visible fluid loss, often mistaken for a housing crack.
- Intermittent gear engagement hesitation: When the plate warps, hydraulic pressure drops, causing delayed shifts under load.
- Contaminated transmission fluid: A compromised seal allows dirt ingress, visible as metallic particles or sludge in the oil pan.
- Audible whining from the transmission sump: Air ingestion through a loose cover plate creates cavitation noise during operation.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4642.330.217 |
| Material | High-tensile cast aluminum alloy with corrosion-resistant coating |
| Dimensions (L x W x H) | 210 mm x 145 mm x 12 mm |
| Weight | 0.85 kg (1.87 lbs) |
| OEM Reference | ZF 4642.330.217 (Genuine) |
| Fastener Torque | 25 Nm (18.4 lb-ft) |
| Operating Temperature Range | -40°C to +120°C |
Compatibility
This cover plate is engineered primarily for the ZF WG 150 series, but it also fits select variants of the WG 180 and WG 200 transmissions where the housing bolt pattern matches. It is not compatible with the WG 120 or older WG 80 series. For exact fitment, verify the housing casting number against the TYPE PLATE (0730365125) affixed to your unit. The plate is secured using the GROOVED STUD (0631311009), which must be replaced if corroded.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4642101109 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4642301205 | TRANSMISSION HOUSING | Secondary housing for valve body section |
| 0730365125 | TYPE PLATE | Identification tag with transmission serial number |
| 0631311009 | GROOVED STUD | Alignment and fastening pin for cover plate |
| 4642301168 | SCREEN SHEET | Fine mesh filter for hydraulic fluid |
| 4642301169 | SCREEN SHEET | Secondary filter element for oil return line |
| 0636100621 | HEXAGON SCREW | M8 bolt for securing cover plate to housing |
| 4642301186 | SCREEN SHEET | Coarse debris screen for sump area |
| 4644106085 | SHIFT SYSTEM | Electro-hydraulic shift actuator assembly |
| 4642306050 | COVER PLATE | Alternate cover plate variant for WG150 |
