Overview
The ZF 4661.131.008 OIL DIPSTICK is a precision-engineered fluid level indicator specifically designed for the WG 94 series of powershift transmissions. This genuine OEM part allows operators and technicians to verify the correct oil fill level, which is critical for maintaining hydraulic pressure and lubrication within the gear train. Mounted directly into the TRANSMISSION HOUSING, the dipstick provides a reliable visual reference for oil condition and volume. The SKU 4661.131.008 is manufactured to ZF’s exacting tolerances, ensuring a secure seal and accurate readings under high-vibration conditions common in construction and agricultural machinery.
Symptoms of Failure
- Hydraulic oil seepage around the dipstick tube: A worn or cracked dipstick seal allows transmission fluid to escape, leading to low oil levels and potential gear damage.
- Inaccurate oil level readings: If the dipstick shaft becomes bent or the markings fade, operators cannot determine the correct fill volume, risking overfilling or underfilling the transmission.
- Contaminated oil ingress: A broken dipstick cap or missing O-ring permits dirt and moisture to enter the sump, accelerating wear on internal components like the VALVE and clutch packs.
- Gear engagement hesitation: Low fluid levels caused by a faulty dipstick seal can result in delayed shifting or slipping, as hydraulic pressure drops below operational thresholds.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 4661.131.008 |
| OEM Reference | ZF 4661.131.008 |
| Material | Steel shaft with nitrile rubber O-ring |
| Overall Length | Approx. 380 mm |
| Weight | 0.12 kg |
| Seal Type | Integrated O-ring (replacement part 0631306174) |
| Compatible Housing | HOUSING II |
Compatibility
This dipstick is engineered for the ZF WG 94 transmission series, which includes models such as the WG94, WG98, and WG100. It is also a direct fit for the WG180 and WG200 variants that share the same sump and housing architecture. The 4661.131.008 interfaces with the TRANSMISSION HOUSING and the secondary HOUSING II assembly. For proper installation, ensure the CYLINDRICAL PIN is correctly aligned to prevent rotation, and verify the TYPE PLATE matches your unit’s serial number for OEM authenticity.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4661101039 | TRANSMISSION HOUSING | Main structural casing for gear and shaft assembly |
| 4661301109 | HOUSING II | Secondary housing for clutch and valve mounting |
| 0631306174 | CYLINDRICAL PIN | Alignment dowel for housing and dipstick tube |
| 0769123894 | TYPE PLATE | Identification plate with transmission serial number |
| 0750100022 | SCREW PLUG | Seals oil drain or fill port |
| 4660201008 | SCREW PLUG | Magnetic drain plug for ferrous debris capture |
| 0636100117 | SCREW PLUG | Hex plug for pressure test ports |
| 0501211384 | VALVE | Hydraulic control valve for shift modulation |
| 0732042156 | COMPRESSION SPRING | Returns valve spool to neutral position |
| 0768409154 | SCREW PLUG | Seals accumulator or cooler circuit |
