Hilti FX 3-A Operating Instructions Manual page 44

7. When the welding operation has completed, use both hands to lift the hand tool in a fluid movement
vertically off the stud.
▶ Pulling the hand tool off at an angle will cause sustained damage to the stud holder.
WARNING
Hazard due to faulty weld! If the surface was inadequately prepared, the welding operation was not
completed correctly or some other fault is present, the stud's load-bearing ability is reduced.
▶ Fault indications during and/or after the welding operation, severe smoke formation and/or a black ring
on the surface round the stud are signs that the stud has not been welded correctly.
8. Check the indicators of the welding machine and the hand tool for indications of a fault. Check the stud
and the workpiece for faults.
▶ Comply with the operating instructions of the stud used in order to check the stud.
▶ In the event of a fault, consult the AFI → page 27 section and the Troubleshooting → page 36 section.
▶ If a fault has occurred correct the welding operation, if possible.
7 Care and maintenance
Care of the product
• 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.
Care of the lithium­ion batteries
• Fully charge the battery every 6 months at the latest.
• Avoid ingress of moisture.
Maintenance
WARNING
Danger of electric shock! Improper repairs to electrical components may lead to serious injuries including
burns.
▶ Repairs to the electrical section of the tool or appliance may be carried out only by trained electrical
specialists.
• Check all visible parts and controls for signs of damage at regular intervals and make sure that they all
function correctly.
• Do not operate the product if signs of damage are found or if parts malfunction. Have it repaired
immediately by Hilti Service.
• After cleaning and maintenance, fit all guards or protective devices and check that they function correctly.
• Do not attempt care or maintenance work on the battery.
To help ensure safe and reliable operation, use only genuine Hilti spare parts and consumables. Spare
parts, consumables and accessories approved by Hilti for use with your product can be found at your
Hilti Store or online at: www.hilti.group
7.1 Cleaning air filter
The air filter has to be cleaned every 2 months.
1. Open the air-filter flap.
2. Remove the air filter from the air-filter flap.
3. Clean the air filter with a dry soft brush.
4. Place the air filter back in position on the air-filter flap.
5. Close the air-filter flap.
7.2 Checking wear parts
Vapors and sparks produced during welding lead to wear of the stud holder, shielding ring and brass ring.
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