There is an oil leak coming from the output shaft:
1. The gearbox of the floor grinder does not dissipate heat well, which causes damage to the oil seal. The best way to fix this is to replace the gearbox and oil seal.
2. The damaged bearings and the misalignment of the shafts cause excessive wear. The solution is to open the gearbox and check which part of the bearings is damaged, then replace it with a new one.
Oil is leaking from the tank wall:
1. No new seal was replaced during maintenance. The solution is to open the gear and replace the old seal with a new one.
2. No sealant was applied or the sealing strip was not installed properly during maintenance. The treatment method is to open the gear and replace the old sealing strip with a new one, then apply the sealant.