Overview
The ZF 0501.330.120 MAGNET is a critical ferrous debris capture component engineered specifically for ZF heavy-duty powershift transmissions used in construction machinery. Positioned within the sump or filter circuit, this OEM genuine part attracts and retains microscopic metallic particles generated during normal gear and clutch wear. By preventing these contaminants from recirculating through the hydraulic system, the magnet safeguards valve bodies, clutches, and bearings from abrasive damage. The SKU 0501.330.120 is precision-manufactured to ZF’s exacting magnetic flux and dimensional tolerances, ensuring reliable long-term filtration performance in demanding off-highway environments.
Symptoms of Failure
- Transmission oil contamination and sludge buildup: When the 0501.330.120 magnet loses its magnetic strength or becomes saturated, ferrous particles remain suspended in the oil, leading to dark, gritty fluid and accelerated internal wear.
- Erratic gear engagement or slipping: Debris bypassing a weakened magnet can clog clutch piston orifices and control valves, causing delayed shifts, harsh engagement, or partial clutch slip under load.
- Premature bearing and bushing failure: Uncaptured metal fines act as lapping compound on rotating surfaces, producing audible whining or grinding noises from the transmission housing.
- Reduced hydraulic pressure and overheating: Contaminated oil restricts flow through coolers and filters, raising operating temperatures and triggering warning codes on construction machinery dashboards.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number / SKU | 0501.330.120 |
| Material | High-grade sintered neodymium-iron-boron (NdFeB) with nickel plating |
| Overall Diameter | 38 mm (1.50 in) |
| Overall Height | 22 mm (0.87 in) |
| Weight | 0.09 kg (0.20 lb) |
| Magnetic Pull Force | ≥ 12 kg (26.5 lb) |
| Max Operating Temperature | 150°C (302°F) |
| OEM Reference | ZF 0501.330.120 (Genuine) |
Compatibility
This magnet is a direct-fit component for ZF’s WG series powershift transmissions commonly found in wheel loaders, graders, and telehandlers. Compatible models include the WG180, WG200, WH200, and 4WG-310 series. It also applies to select Ergopower and Ecomat transmissions used in agricultural and material handling equipment. Always verify your transmission serial number against the 0501.330.120 form factor before installation.
During a rebuild or deep clean, this magnet is typically removed from the 4663101001: HOUSING assembly. The 4663301025: COVER must be unbolted to access the magnet pocket. Secure the magnet using a 0631306816: CYLINDRICAL PIN and fasten the cover with a 0636100817: CAP SCREW to ensure proper sealing and alignment.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4663101001 | HOUSING | Encloses the magnet and transmission sump area |
| 4663301025 | COVER | Seals the housing and retains the magnet assembly |
| 0631306816 | CYLINDRICAL PIN | Aligns and locks the magnet in position |
| 0636100817 | CAP SCREW | Fastens the cover to the housing |
| 4656301148 | FIXING PLATE | Secures the magnet against vibration |
| 0636611009 | STUD | Provides threaded mounting for cover bolts |
| 0634303928 | O-RING | Seals the housing-to-cover interface |
| 4475280099 | SCREW PLUG | Closes drain or test ports in the housing |
| 0634303266 | O-RING | Seals the screw plug |
| 4475280018 | SCREW PLUG | Alternate port plug for different housing variants |
