Overview
The ZF 4661.185.036 ACCESSORIES for WG94 is a precision-engineered auxiliary component designed to support the hydraulic and mechanical stability of the WG 94 Series transmission. This OEM genuine part functions as a critical interface element within the valve body or control housing assembly, ensuring proper fluid routing and pressure regulation during gear shifts. The SKU 4661.185.036 is manufactured to ZF’s exacting tolerances, making it essential for maintaining the integrity of the transmission’s internal lubrication and cooling circuits. When installed alongside the 4661101039: TRANSMISSION HOUSING and the 4661301109: HOUSING II, this accessory ensures seamless alignment of the hydraulic passages that govern clutch pack engagement.
Symptoms of Failure
- Intermittent gear hunting or delayed engagement: A worn 4661.185.036 can cause erratic hydraulic pressure, leading to hesitation when shifting from neutral to drive or reverse.
- Oil seepage around the valve body area: Degraded sealing surfaces on this accessory often result in visible fluid leaks near the transmission pan or housing joints.
- Abnormal whining or buzzing noises during acceleration: As the component loses dimensional stability, it may vibrate against the 0631306174: CYLINDRICAL PIN, producing audible metallic sounds.
- Erratic shift quality under load: Failure of this part disrupts the oil flow to the clutch packs, causing harsh or slipping shifts when towing or climbing grades.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4661.185.036 |
| Material | Hardened steel with corrosion-resistant coating |
| Weight | 0.28 kg (0.62 lbs) |
| Length | 68 mm |
| Width | 32 mm |
| Height | 18 mm |
| OEM Reference | ZF 4661.185.036 |
| Operating Temperature Range | -40°C to +120°C |
Compatibility
This accessory is specifically engineered for the ZF WG 94 Series, which includes the WG180, WG200, and WG240 transmission models commonly found in medium-duty trucks, buses, and off-highway equipment. It is also compatible with select WG 94 variants used in agricultural tractors and material handlers. For proper installation, verify that the 0769123894: TYPE PLATE on your transmission matches the WG94 designation. The 4661.185.036 interfaces directly with the main control bore and should be replaced whenever the transmission housing is serviced to prevent premature wear of adjacent components.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4661101039 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4661301109 | HOUSING II | Secondary housing for valve body |
| 0631306174 | CYLINDRICAL PIN | Alignment dowel for housing assembly |
| 0769123894 | TYPE PLATE | Identification plate with model data |
| 0750100022 | SCREW PLUG | Seals oil gallery access port |
| 4660201008 | SCREW PLUG | High-pressure port plug |
| 0636100117 | SCREW PLUG | Drain plug for housing |
| 0501211384 | VALVE | Pressure regulation spool |
| 0732042156 | COMPRESSION SPRING | Returns valve to neutral position |
| 0768409154 | SCREW PLUG | Low-pressure circuit plug |
