DR. BENDER EBM 25, Manual

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11
7.0 Servicing and care
Warning
Before starting any servicing or repair work always disconnect the mains plug.
After all repairs you must have the core drilling machine inspected by an electri-
cian (statutory regulation pursuant to VBG4 since 1.1.1990).
7.1 Daily care
Ensure that no water escapes from the overflow hole. This will cause gear damage and may reduce the
electrical safety of the core drilling machine. In this case please contact an authorised service centre.
Inspection the machine for signs of damage to the switch, mains lead or plug connector.
After completing the drilling work clean the core drilling machine. Grease the core bit mounting thread. The
ventilation slits must be kept clean and open at all times. Ensure that no water gets into the core drilling
machine whilst you are cleaning it.
To ensure that the sealing function is maintained, oil the drill spindle:
- Disconnect the core drilling machine from the water supply. Open the water connection shut-off
cock and insert a drop of oil, close the shut-off cock, place a few drops of oil into the overflow hole
and turn the machine briefly by hand.
7.2 After approx. 150 hours of use
After the first 150 hours of use, the gearbox oil must be changed.
7.3 After approx. 250 hours of use
Have the carbon brushes checked, and replaced if necessary, by an electrician.
Avoid adjusting the carbon retaining springs.
Only use original spare parts.
7.4 Quarterly
Have the cable, switch and plugs inspected by an expert (pursuant to VBG4) and document the process.
Replacing the gearbox oil will considerably extend the service life of the gear.