# Traction gearbox, locomotive No. 44 099 — MAY OOD · Plovdiv Locomotive Depot

**IE S043**  
MAY OOD · Plovdiv Locomotive Depot · Bulgaria · 2002

Teeth of the treated gear built up metal, pitting closed up, the control unit's wear continued. Bulgaria · 2002. Treatment without disassembly, a control…

## Measured

- tooth thickness of the treated gear wheel, deviation from nominal 0.62-1.22 → 0.26-0.64 mm — **0.34-0.58 mm**
- tooth thickness of the untreated gear wheel over the same 35,000 km, deviation 0.68-0.70 → 1.00 mm — **0.30-0.32 mm**

## Conclusion

Teeth of the treated gear built up metal, pitting closed up, the control unit's wear continued

Page: https://industry.xado.com/case/protokol_mai_ood_reduktor_tiagovogo_dvigatelia_lokomotiva_g
PDF report: https://industry.xado.com/pdf/TIER%20S/MAYPlovdiv/Lokomotiv-44-099/IE-S043_XADO_MAYPlovdiv_Lokomotiv-44-099_EN.pdf
Original scan: https://industry.xado.com/scans/protokol_mai_ood_reduktor_tiagovogo_dvigatelia_lokomotiva_g.pdf