Overview
The ZF 4642.231.123 OIL LEVEL TUBE is a precision-engineered component designed specifically for the WG150 series transmission. This OEM genuine part serves as the critical conduit for monitoring and maintaining proper fluid levels within the transmission sump. Positioned along the side of the main housing assembly, the oil level tube allows for accurate dipstick readings and ensures that the hydraulic system operates within its optimal oil volume range. The SKU 4642.231.123 is manufactured to ZF’s exacting tolerances, guaranteeing a leak-free seal and reliable long-term performance in heavy-duty industrial applications.
Symptoms of Failure
- Transmission fluid leaking from the tube connection point: A worn or cracked oil level tube often results in visible oil drips beneath the vehicle or equipment, particularly after extended operation.
- Inaccurate or fluctuating oil level readings: When the tube becomes deformed or its internal bore is obstructed, the dipstick may show inconsistent fluid levels, leading to overfilling or underfilling.
- Gear slipping or delayed engagement due to low fluid: A compromised tube can cause gradual fluid loss, reducing hydraulic pressure and resulting in sluggish shifting or gear slippage during operation.
- Contaminated transmission fluid from external debris ingress: A cracked tube allows dirt and moisture to enter the transmission, accelerating wear on internal components like the TRANSMISSION HOUSING and TRANSMISSION HOUSING.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 4642.231.123 |
| OEM Reference | ZF 4642.231.123 |
| Material | High-grade aluminum alloy with corrosion-resistant coating |
| Overall Length | 310 mm (approx.) |
| Tube Outer Diameter | 18 mm |
| Weight | 0.35 kg |
| Seal Type | Integrated O-ring groove (O-ring sold separately) |
| Thread Size | M12 x 1.5 |
Compatibility
While the 4642.231.123 is primarily designed for the WG150 transmission series, its mounting configuration and fluid level specifications make it compatible with several other ZF models. This oil level tube fits the WG180, WG200, and WG210 series transmissions that share the same sump geometry. It is also commonly used in the WG160 and WG250 variants when equipped with the corresponding TYPE PLATE identification. For proper installation, ensure the tube is secured with the correct GROOVED STUD to prevent vibration loosening.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4642101109 | TRANSMISSION HOUSING | Main structural casing for gear and shaft assembly |
| 4642301205 | TRANSMISSION HOUSING | Secondary housing component for oil distribution |
| 0730365125 | TYPE PLATE | Identification plate for transmission model and specs |
| 0631311009 | GROOVED STUD | Fastener for securing oil level tube to housing |
| 4642301168 | SCREEN SHEET | Filter mesh for oil intake protection |
| 4642301169 | SCREEN SHEET | Secondary filter element for hydraulic circuit |
| 0636100621 | HEXAGON SCREW | Mounting bolt for transmission cover plates |
| 4642301186 | SCREEN SHEET | Fine mesh screen for valve body protection |
| 4644106085 | SHIFT SYSTEM | Hydraulic shift actuator assembly |
| 4642306050 | COVER PLATE | Sealing plate for transmission access port |
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