Overview
The ZF 4644.231.118 OIL LEVEL TUBE is a precision-engineered component designed for the WG200 and WG201 transmission series. This OEM genuine part serves as the critical conduit for monitoring and maintaining proper fluid levels within the transmission sump. Installed directly into the TRANSMISSION HOUSING (4644101216), it provides a sealed pathway for dipstick access while preventing contamination ingress. The SKU 4644.231.118 ensures exact fitment and material compatibility with ZF’s hydraulic systems, supporting optimal lubrication and cooling flow.
Symptoms of Failure
- Visible oil leaks around the dipstick tube base: A cracked or degraded OIL LEVEL TUBE often causes fluid seepage at the housing interface, leading to low transmission fluid levels.
- Erratic gear engagement or slipping: When the tube fails, inaccurate fluid readings can result in under-filling, causing hydraulic pressure loss and delayed shifts.
- Contaminated transmission fluid: A broken tube allows dirt and moisture to enter the sump, accelerating wear on internal components like the TRANSMISSION HOUSING (4644301223).
- Difficulty reading fluid level: Physical distortion of the tube prevents proper dipstick insertion, making routine maintenance unreliable.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4644.231.118 |
| Material | Steel with corrosion-resistant coating |
| Length (approx.) | 210 mm |
| Outer Diameter | 12 mm |
| Weight | 0.15 kg |
| OEM Reference | ZF 4644.231.118 |
| Sealing Method | Integrated O-ring groove |
Compatibility
This OIL LEVEL TUBE is engineered for ZF WG-series transmissions, specifically the WG180, WG200, and WG201 models. It directly replaces the original equipment part in applications requiring precise fluid level monitoring. The tube interfaces with the TYPE PLATE (0730365067) for identification and is secured using a GROOVED STUD (0631311009). Always verify compatibility with your transmission’s housing casting number before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644101216 | TRANSMISSION HOUSING | Main structural casing for gear sets |
| 4644301223 | TRANSMISSION HOUSING | Alternate housing variant for WG200 |
| 0730365067 | TYPE PLATE | Identification plate for transmission specs |
| 0631311009 | GROOVED STUD | Fastener for tube mounting |
| 4644303060 | COVER PLATE | Seals housing access openings |
| 4644303061 | COVER PLATE | Alternate cover plate variant |
| 0634306525 | O-RING | Seals tube-to-housing connection |
| 0636305026 | SCREW PLUG | Closes fluid drain ports |
| 4644301279 | SCREEN SHEET | Filters debris from fluid flow |
| 4644301088 | SEALING CAP | Protects unused tube openings |
