Overview
The ZF 0501.226.327 OIL DIPSTICK is a precision-engineered measurement tool designed specifically for the WG94 transmission series. This OEM genuine part provides accurate fluid level readings, ensuring optimal lubrication and hydraulic pressure within the gearbox. Mounted directly into the TRANSMISSION HOUSING, the dipstick allows operators to quickly verify oil condition without disassembly. The SKU 0501.226.327 replaces worn or broken dipsticks that compromise fluid monitoring, making it essential for preventive maintenance on heavy-duty ZF drivelines.
Symptoms of Failure
- Transmission oil leaks at the dipstick tube – A cracked or warped dipstick seal allows fluid to escape, leading to low oil levels and potential gearbox overheating.
- Inaccurate fluid level readings – Worn markings or a bent dipstick shaft cause false readings, resulting in overfilling or underfilling that triggers gear slipping during load shifts.
- Hard shifting or delayed engagement – When the dipstick fails to seal properly, air enters the hydraulic circuit, causing erratic clutch pack engagement and rough gear changes.
- Visible oil residue around the transmission housing – Persistent wetness near the dipstick port indicates seal failure, often accompanied by a burnt oil smell from friction material wear.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number (SKU) | 0501.226.327 |
| Material | Chrome-plated steel with nitrile O-ring |
| Overall Length | 385 mm (estimated) |
| Handle Diameter | 22 mm |
| Weight | 0.12 kg |
| OEM Reference | ZF 0501.226.327 |
| Thread Size | M18 x 1.5 (estimated) |
Compatibility
This oil dipstick is engineered for the ZF WG94 series, including WG94, WG94-2, and WG94-3 models. It also fits select WG180 and WG200 transmissions that share the same housing architecture. The part interfaces directly with the HOUSING II and is secured using a CYLINDRICAL PIN to prevent rotation. Always verify your transmission’s identification via the TYPE PLATE before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4661101042 | TRANSMISSION HOUSING | Main structural casing for gear assembly |
| 4661301108 | HOUSING II | Secondary housing for valve body and dipstick |
| 0631306174 | CYLINDRICAL PIN | Alignment pin for dipstick tube retention |
| 0769123894 | TYPE PLATE | Identification plate for transmission model |
| 0750100022 | SCREW PLUG | Seals oil drain or fill ports |
| 4660201008 | SCREW PLUG | High-pressure plug for housing ports |
| 0636100117 | SCREW PLUG | Magnetic plug for debris collection |
| 0501211384 | VALVE | Hydraulic control valve for shift modulation |
| 0732042156 | COMPRESSION SPRING | Provides tension for valve return |
| 0768409154 | SCREW PLUG | Sealing plug for pressure test points |
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