Care And Maintenance - Hilti DD 350 Manual Del Usuario

1. If the following conditions are met, also take this action:
Conditions: Drilling upward
▶ Set the 3-way valve to the middle position to drain the water from the core bit.
2. Remove the diamond core bit from the hole.
3. Switch off the diamond core drilling machine.
4. Lock the carriage on the rail with the carriage lock.
5. Switch off the wet-type industrial vacuum cleaner, if used.
5.2.8 Procedure for dealing with a jammed core bit
If the bit jams the safety clutch disengages. Then the motor switches off.
The step-by-step procedure for releasing the core bit is as follows:
5.2.8.1 Releasing the core bit
1. Unplug the supply cord from the power outlet.
2. If the following conditions are met, also take this action:
Conditions: Releasing with open-ended wrench
▶ Release the core bit by engaging an open-ended wrench close to the connection end.
▶ Release the core bit by turning it.
3. If the following conditions are met, also take this action:
Conditions: Releasing with hand wheel
▶ Release the core bit from the base material by turning the hand wheel.
▶ Check that the carriage is locked by lightly turning the hand wheel.
▶ Plug the supply cord of the diamond core drilling machine into the power outlet.
4. Plug the supply cord of the diamond core drilling machine into the power outlet.
5. Continue the drilling operation.
5.2.9 Removing the diamond core bit
1. Unplug the supply cord from the power outlet.
2. Lock the carriage on the rail.
3. Check that the carriage is locked by lightly turning the hand wheel.
4. Open the chuck by turning it in the direction indicated by the open brackets symbol.
5. Remove the core bit.
5.2.10 Removing the diamond core drilling machine
1. Lock the carriage on the rail with the carriage lock. Check to ensure that it is securely fastened.
2. Hold the diamond core drilling machine securely with one hand on the carrying grip.
3. Release the eccentric pin in the lock of the diamond core drilling machine.
4. Pull out the eccentric pin.
5. Remove the diamond core drilling machine from the carriage.
6. Push the eccentric pin into the carriage as far as it will go.

6 Care and maintenance

WARNING
Danger of electric shock! Carrying out care and maintenance while the supply cord is connected to
the power outlet presents a risk of serious injuries including burns.
▶ Always unplug the supply cord before carrying out all care and maintenance tasks.
Care
• Carefully remove stubborn dirt from the tool.
• Clean the air vents carefully with a dry brush.
• Use only a slightly damp cloth to clean the casing. Do not use cleaning agents containing silicone as
they can attack the plastic parts.
Printed: 18.10.2017 | Doc-Nr: PUB / 5236054 / 000 / 02
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