Tweco Tri-Arc Serie - Manual (Page 15)

4-1
SECTION 4: INSTALLATION
4.01 Tri-Arc ® Series Torch Head Assembly
Install the upper and lower head assemblies into the Tri-Arc torch body by following
these instructions:
1. Remove the front insulators from the body and upper arm of the assembly by using
a straight blade screw driver.
2. Apply pressure to the torch lever lifting the upper arm away from the body to allow
the heads to easily be inserted into the body and upper arm. Once both heads are in
place, release the lever to hold the head assemblies in place.
3. Place the wave washer supplied with the head assemblies over the torch head screw
and thread the screw into the threaded stem on each head. Make sure this connection
is tight.
4. Replace the front insulators in place and re-tighten the screws to hold the insulators
in place.
PART NO. DESCRIPTION
94-378-267 Head Upper & Lower 1/2" (12.7mm) General Purpose
94-378-270 Head Upper & Lower 5/8" (15.9mm) General Purpose
94-378-273 Head Upper & Lower 3/4" (19.05mm) General Purpose
94-378-343 Head Upper & Lower 1" (25.4mm) General Purpose
94-378-286 Head Upper & Lower 1/2" (12.7mm) Padwashing
94-378-289 Head Upper & Lower 5/8" (15.9mm) Padwashing
94-378-283 Head Upper & Lower 3/4" (19.05mm) Padwashing
94-378-298 Head Upper & Lower Defect Removal
Table 4-1: Head assembly options (sold separetely)