Overview
The ZF 4661.305.004 SCREEN SHEET is a precision-engineered filtration component designed for the WG 90 and WG 94 transmission series. This OEM genuine part sits directly within the hydraulic control circuit, capturing particulate contaminants before they can reach critical valve bodies and clutch packs. By maintaining fluid cleanliness, the 4661.305.004 ensures consistent hydraulic pressure regulation and extends the service life of adjacent assemblies such as the 4661101021 TRANSMISSION HOUSING and the 4661301047 HOUSING II. This screen sheet is a direct OEM replacement, guaranteeing a perfect fit and material compatibility with factory specifications.
Symptoms of Failure
When the ZF 4661.305.004 screen sheet becomes clogged or damaged, operators typically notice these specific failure indicators:
- Erratic gear engagement and slipping: A blocked screen restricts oil flow to the shift solenoids, causing delayed or harsh shifting under load.
- Low transmission oil pressure warnings: Debris accumulation on the screen reduces pump suction efficiency, triggering dashboard alerts or diagnostic trouble codes.
- Overheating during sustained operation: Restricted fluid circulation prevents proper heat dissipation, leading to elevated sump temperatures and accelerated wear.
- Metallic debris in the oil pan: A torn screen sheet allows particles to circulate, often resulting in secondary damage to the 0631306174 CYLINDRICAL PIN and valve body components.
Technical Specifications
| Part Number | 4661.305.004 |
| Material | Stainless steel mesh with polymer frame |
| Dimensions | 120 mm x 80 mm x 5 mm (estimated) |
| Weight | 0.15 kg (0.33 lbs) |
| OEM Reference | ZF 4661.305.004 |
| Micron Rating | 150 micron nominal |
| Operating Temperature | -40°C to +120°C |
Compatibility
This screen sheet is specifically engineered for ZF WG series powershift transmissions. Primary compatibility includes the WG90 and WG94 models, commonly found in agricultural tractors and construction loaders. It also fits the WG180, WG200, and WG250 series where the hydraulic sump design matches the WG90/94 architecture. Always verify the 4661301093 TUBE orientation and housing gasket condition during replacement to ensure proper sealing.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4661101021 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4661301047 | HOUSING II | Secondary housing for valve body assembly |
| 4661301093 | TUBE | Hydraulic fluid passage conduit |
| 0631306174 | CYLINDRICAL PIN | Alignment dowel for housing mating |
| 0769123894 | TYPE PLATE | Identification tag for transmission model |
| 0750100022 | SCREW PLUG | Sealing plug for oil drain port |
| 0636302602 | SCREW PLUG | Magnetic plug for debris collection |
| 0634100633 | O-RING | Hydraulic seal for tube connections |
| 4661301041 | NOZZLE | Lubrication jet for gear mesh |
| 4661301062 | NOZZLE | Cooling spray nozzle for clutch pack |
