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 elec-
trician (statutory regulation pursuant to VBG4 since 1.1.1990).
7.1
Daily care
Ensure that no water is emitted from the overflow hole. This will cause gear damage and may adversely
affect the electrical safety of the core drill. If water is emitted, see assistance from an authorised service
outlet.
Visual inspection for damage to the switch, connection lead or plug connector.
After completing the drilling work clean the core drill. Grease the core bit mounting thread. The ventilation
slits must always be clean and open. Ensure that during the cleaning process, no water gets into the core
drill.
Empty the cooling water in the drilling motor after the use. Open to this the ball cock completely and let the
cooling water go off. This is particulary very important because of freezing education in the winter months.
To maintain the seal, oil the drilling spindle as follows
- Disconnect the core drill from the water supply. Open the water connector shut-off cock, add sev-
eral drops of oil, close the shut-off cock, add several drops of oil to 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.
-
Remove the screws (35). Pull the cap (32) off the motor casing (2). Remove the carbon
brushes screws (13), raise the carbon brushes retaining springs and take out the carbon
brushes (9). Clean the carbon brush holder and collector with a paintbrush.
-
Fit new carbon brushes following the above instructions in reverse. Position the cap (32) and
secure it with the screws (35). Fit the cap (32) on the motor casing (2) by tapping it gently with
a rubber mallet or the like. Tighten the screws (35). Release the stress by tapping the cap (32)
twice.
Avoid adjusting the carbon retaining springs.
Only use original spare parts.
7.4
Quarterly
Have the cable, switch and plug connectors inspected by a specialist (regulation pursuant to VBG4) and
document this inspection. Changing the gearbox oil will produce a considerably increase in the service life
of the gear.
