IE S043TEST REPORT · PLOVDIV LOCOMOTIVE DEPOT
Locomotive traction gearbox: gear teeth gained metal with no teardown, in service
Teeth of the treated gear built up metal, pitting closed up, the control unit's wear continued. 0.34–0.58 mm — tooth thickness of the treated gear wheel, deviation from nominal 0.62–1.22 → 0.26–0.64 mm; 0.30–0.32 mm — tooth thickness of the untreated gear wheel over the same 35,000 km, deviation 0.68–0.70 → 1.00 mm (2002).
signed and stamped by the depot
Key results
| EQUIPMENT | MILEAGE DURING TEST | WHAT WAS MEASURED |
|---|---|---|
| Locomotive No. 44 099, traction gearbox — experimental | 35,000 km | Tooth thickness of the large gear wheel at the constant chord height |
| Locomotive No. 44 099, traction gearbox — control | 35,000 km | Tooth thickness of the small gear wheel, same measuring points |
Treated gearbox — tooth thickness of the large gear wheel
| TOOTH | DEVIATION BEFORE TREATMENT | DEVIATION AFTER 35,000 KM | THICKNESS CHANGE |
|---|---|---|---|
| I | -0.62 mm | -0.28 mm | +0.34 mm |
| III | -0.61 mm | -0.27 mm | +0.34 mm |
| IV | -0.62 mm | -0.26 mm | +0.36 mm |
| V | -1.22 mm | -0.64 mm | +0.58 mm |
The largest gain was on the most worn tooth V: the coating builds up where wear is greater and does not build up where there is none.
Control gearbox of the same locomotive — tooth thickness of the small gear wheel
| TOOTH | DEVIATION AT START | DEVIATION AFTER 35,000 KM | THICKNESS CHANGE |
|---|---|---|---|
| I | -0.68 mm | -1.00 mm | -0.32 mm |
| II | -0.70 mm | -1.00 mm | -0.30 mm |
| III | -0.69 mm | -1.00 mm | -0.31 mm |
| IV | -0.70 mm | -1.00 mm | -0.30 mm |
| V | -0.70 mm | -1.00 mm | -0.30 mm |
The report notes: after the large gear wheel of the control gearbox failed, the small gear wheel of the experimental gearbox was fitted into it.
Commission conclusion
Current equivalent
Revitalizant gel for gearboxes →
Industrial gearboxes, final and central drives, truck and tractor gearboxes, open gear and chain drives.
How such units are treated:
About this result:
Limits of this report: The results refer to the traction gearbox of locomotive No. 44 099 at the Plovdiv depot over 35,000 km of running; on other units and operating modes the figures may differ. The treatment was carried out by “MAY” OOD, a XADO distributor; the measurements and certification were made by the commission of the Plovdiv locomotive depot.