Overview
The ZF 0501.218.980 MAGNET is a critical ferrous debris capture component engineered for the hydraulic and lubrication circuits of heavy-duty construction machinery transmissions. This OEM genuine part, identified by SKU 0501.218.980, is typically seated within the transmission sump or valve body cavity, where it attracts and retains microscopic metal particles generated during normal gear and bearing wear. By preventing these contaminants from recirculating, the magnet safeguards precision-machined surfaces and extends the service life of the entire drivetrain. It is often installed adjacent to the 4663101001: HOUSING and the 4663301025: COVER, forming a sealed assembly that directs oil flow directly over the magnetic element.
Symptoms of Failure
- Transmission oil contamination and sludge buildup: When the magnet becomes saturated or loses its magnetic strength, ferrous particles remain suspended in the oil, leading to a dark, gritty sludge that accelerates internal wear.
- Erratic gear engagement or slipping under load: Contaminated oil can clog valve body passages, causing delayed or harsh shifts, particularly in WG-series transmissions operating in high-torque construction applications.
- Increased operating noise from the gear train: Uncaptured metal debris acts as an abrasive between gears and bearings, producing a distinct whining or grinding sound that worsens as the magnet’s efficiency declines.
- Premature failure of hydraulic seals and O-rings: Particulate contamination erodes sealing surfaces, leading to external leaks around the 0631306816: CYLINDRICAL PIN and the 0636100817: CAP SCREW locations.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Number / SKU | 0501.218.980 |
| Material | High-grade neodymium alloy with nickel-plated steel casing |
| Overall Diameter | 38 mm (1.50 in) |
| Overall Length | 65 mm (2.56 in) |
| Weight | 0.12 kg (0.26 lbs) |
| Magnetic Pull Force | ≥ 12 kg (26.5 lbs) |
| OEM Reference | ZF 0501.218.980 |
| Operating Temperature Range | -40°C to +150°C (-40°F to +302°F) |
Compatibility
This magnet is a standard fitment for ZF WG-series powershift transmissions commonly used in wheel loaders, bulldozers, and excavators. It is directly compatible with the WG180, WG200, and WG210 models. Additionally, it is found in certain 4WG-200 and 6WG-200 variants where the magnetic trap is integrated into the sump cover. For proper sealing and retention, always pair this magnet with a new 0634303928: O-RING and verify the condition of the 4656301148: FIXING PLATE that secures it in place.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4663101001 | HOUSING | Encloses the magnet and directs oil flow |
| 4663301025 | COVER | Seals the housing assembly |
| 0631306816 | CYLINDRICAL PIN | Aligns housing and cover during assembly |
| 0636100817 | CAP SCREW | Fastens the cover to the housing |
| 4656301148 | FIXING PLATE | Secures the magnet in its pocket |
| 0636611009 | STUD | Provides threaded mounting point for the fixing plate |
| 0634303928 | O-RING | Primary seal between housing and cover |
| 4475280099 | SCREW PLUG | Closes oil drain or inspection port |
| 0634303266 | O-RING | Seal for screw plug 4475280099 |
| 4475280018 | SCREW PLUG | Alternate port plug for different housing configurations |
