Hilti NURON NPU 100-22 Original Operating Instructions page 26

WARNING
Risk of injury! Unintentional starting.
▶ Remove the battery before inserting, changing or removing the punching insert.
CAUTION
Risk of injury! The accessory tool may be hot and/or have sharp edges.
▶ Wear protective gloves when changing the accessory tool.
▶ Never lay down a hot accessory tool on a flammable surface.
In cold weather the hydraulic oil can thicken and slow the punching operation. Perform 5 to 10 empty
punching operations to heat up the punching tool.
1. Determine the exact position of the hole and pre-drill an opening for the draw stud.
To pre-drill the hole, use a drill bit of a diameter slightly larger than the diameter of the draw stud.
2. Press the piston return switch and hold it down until the piston has fully retracted.
3. Screw the draw stud into the mount on the punching head.
4. Mount the die on the draw stud.
5. Pass the draw stud through the pre-drilled opening.
6. Screw the punch, with the cutting edges facing toward the sheet of material to be cut, on to the draw
stud until the punch is seated against the sheet.
7. Press the control switch and hold it down until the punching operation is automatically completed.
Disassemble the punch and die so that any remaining scraps of sheet material can be removed.
7 Care and maintenance
WARNING
Risk of injury with battery inserted !
▶ Always remove the battery before carrying out care and maintenance tasks!
Care of the product
• Carefully remove stubborn dirt.
• Carefully clean the air vents, if present, with a dry, soft brush.
• Use only a slightly damp cloth to clean the housing. Do not use cleaning agents containing silicone as
these can attack the plastic parts.
• Use a dry, clean cloth to clean the contacts of the product.
Care of the Li­ion batteries
• Never use a battery with clogged air vents. Clean the air vents carefully using a dry, soft brush.
• Avoid unnecessary exposure of the battery to dust and dirt. Never expose the battery to high levels of
moisture (e.g. by being dipped in water or left in the rain).
If a battery has been soaked by moisture, treat it as a damaged battery. Isolate it in a non-flammable
container and consult Hilti Service.
• Keep the battery free of extraneous oil and grease. Do not permit dust or dirt to accumulate unnecessarily
on the battery. Clean the battery with a dry, soft brush or a clean, dry cloth. Do not use cleaning agents
containing silicone as these can attack the plastic parts.
Do not touch the contacts of the battery and do not remove the factory-applied grease from the contacts.
• Use only a slightly damp cloth to clean the housing. Do not use cleaning agents containing silicone as
these can attack the plastic parts.
Maintenance
• Check all visible parts and controls for signs of damage at regular intervals and make sure that they all
function correctly.
• Do not use the product if signs of damage are found or if parts malfunction. Immediately have the product
repaired by Hilti Service.
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