Hilti FX 3-A Operating Instructions Manual page 40

▶ Charge the product as described in the operating instructions of the Hilti C 53 charger.
You can resume operation of the product when the battery has charged to ≥25 % capacity.
5.3 Changing inert-gas can
CAUTION
Risk of injury by gas escaping during gas can replacement. Hearing damage.
▶ Wear hearing protection.
CAUTION
Risk of damage to the seal due to flash-chilling. Escaping inert gas has the effect of flash-chilling the seal
on the gas can connection. The chilled seal can be damaged and consequently leak.
▶ Unscrew the used gas can from the connection slowly.
▶ Wait at least 2 minutes before inserting a new gas can.
Change the inert-gas can when it is empty. See the section headed Indicators for gas fill level and battery
→ page 28.
Comply with the safety data sheet of the inert-gas can.
1. Open the cover.
2. Fully unscrew the inert-gas can counter-clockwise from the connection.
▶ In this process, residual gas escapes from the inert-gas can with a loud hiss.
3. Screw the new inert-gas can clockwise into the connection and tighten the can hand-tight.
Materials
Inert-gas can FX 3­GC
4. Close the cover.
▶ The action of closing the cover pierces the inert-gas can.
5.4 Installing / changing stud holder
WARNING
Risk of injury by stud holder! The stud holder gets hot in use.
▶ To avoid burns, wait until the stud holder has cooled down.
▶ Wear protective gloves when changing the stud holder.
1. Make sure that the welding machine is switched off. → page 33
2. Twist the shielding ring counter-clockwise by hand and remove it from the hand tool.
3. If a stud holder is installed, use the following tools to unscrew the stud holder counter-clockwise to
remove it from the hand tool:
Materials
S­BT 1⁄4" torque screwdriver - 5 Nm
X­SHT F3 accessory tool for stud change
▶ To avoid damage, insert the accessory tool fully into the stud holder.
▶ To avoid damage, do not use any tool other than the recommended torque screwdriver.
Replace the shielding ring and/or stud holder if worn. → page 34
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