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Belzona Repairs Cracked Gearbox



Mining and Quarrying (MINQ)


Áreas Know-How:

Engines and Casings (ENC)


Cliente / ubicación:

Quarry, Cambridge, UK


Fecha de aplicación:

October 2012


Situación de aplicación:

Gearbox from CAT 966G loader was dropped from crane during routine maintenance causing large crack.



The workshop tried to repair this crack by welding it but when the weld cooled down the crack reopened and also created more cracks in the gearbox casing. Quarry contacted Belzona for an alternative solution.



Belzona® 1111 (Super Metal)



Cast steel


Método de aplicación:

Application was carried out in accordance with Belzona Know-How System Leaflet ENC-1. After drilling and tapping ends of all cracks to "blind" them steel straps were bolted across the vee'd out cracks before sealing with Belzona® 1111 incorporating Belzona® 9341 (Reinforcement Tape). Finally the repair  was smoothed and painted.


Hechos Belzona:

Repairing the cracks by welding had failed and the cost of new gearbox casing was £7,000 with weeks /months of delay. Approx £200 of Belzona products were used therefore saving the quarry approx £6,800 and the repaired gearbox was back in service within 4 days


Descripciones de fotografías

Cracks in gearbox marked in red Gearbox prepared by workshop Belzona® 1111 being applied Completed repair with gearbox repainted and fitted to engine 2 days later

Case study pic one


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