Overview
The ZF 0501.212.178 OIL DIPSTICK is a precision-machined component engineered specifically for the WG 98 Series transmission. This genuine OEM part provides a sealed, graduated conduit for checking and maintaining proper fluid levels within the transmission sump. Mounted directly into the TRANSMISSION HOUSING, the dipstick ensures accurate oil measurement, preventing both under-fill and over-fill conditions that can lead to premature wear. The SKU 0501.212.178 is manufactured to ZF’s exacting tolerances, guaranteeing a perfect fit and reliable service life in heavy-duty industrial applications.
Symptoms of Failure
- Transmission fluid seepage at the dipstick tube base: A degraded O-ring or cracked dipstick body allows oil to escape, leaving visible puddles under the bell housing.
- Inaccurate oil level readings causing gear slipping: Worn markings or a bent dipstick shaft lead to false fluid level indications, resulting in low hydraulic pressure and clutch pack slippage during load shifts.
- Contaminated fluid entry through a broken dipstick cap: A missing or cracked cap permits dirt and moisture ingress, accelerating internal component wear and reducing transmission service intervals.
- Difficulty inserting or removing the dipstick from the guide tube: Corrosion or deformation of the dipstick shaft creates binding, often accompanied by a metallic scraping noise during routine checks.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 0501.212.178 |
| Material | Chrome-plated steel with nitrile O-ring |
| Overall Length | 385 mm (estimated) |
| Dipstick Blade Width | 8 mm |
| Weight | 0.12 kg |
| OEM Reference | ZF 0501.212.178 |
| Thread Size | M14 x 1.5 (cap) |
| Operating Temperature Range | -40°C to +150°C |
Compatibility
This dipstick is a direct-fit component for the ZF WG 98 Series transmission family. Based on its design and mounting interface, the 0501.212.178 is compatible with the following models: WG98, WG120, WG150, WG180, WG200, and WG250. It integrates with the HOUSING II assembly and is secured using a CYLINDRICAL PIN to prevent rotation. Always verify your transmission’s serial number against the TYPE PLATE before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 0750100022 | SCREW PLUG | Seals the drain port in the transmission pan |
| 4660221013 | TUBE | Guides the dipstick into the oil sump |
| 0634100317 | O-RING | Provides a leak-proof seal at the dipstick tube connection |
| 0636103273 | CAP SCREW | Fastens the dipstick bracket to the housing |
| 0634306311 | O-RING | Seals the dipstick cap against moisture ingress |
| 4660321029 | FIXING PLATE | Locks the dipstick tube in position |
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