Safety Precautions; Routine And Periodic Maintenance; Recommended Tools; Cleaning And Inspections - Marquette AUTOPRO 100 SG Manual Del Operador

MAINTENANCE

SAFETY PRECAUTIONS

WARNING
ELECTRIC SHOCK can kill.
• Only qualified personnel
should perform this main-
tenance.
• Turn the input power OFF at the dis-
connect switch or fuse box before
working on this equipment.
• Do not touch electrically hot parts.
-----------------------------------------------------
ROUTINE AND PERIODIC
MAINTENANCE

RECOMMENDED TOOLS

• #2 Phillips screw-driver
• Slotted screw-driver
• 5/16 inch nut driver
• Torque Wrench
• Adjustable-jaw pliers
• 7/16 inch open-end wrench (gas diffuser)
• 9/16 inch open-end wrench (gun tube nut)
• Welding pliers (optional)
• Wire cutter
• Wire stripper
• Needle nose pliers
• Terminal crimping tool
• Flashlight
• Hand-held electrical meter *
• 3.0 mm metric allen wrench (drive roll
screw)
• Tape measure or 6-inch scale
• Tachometer (optional)
*Note: Two meters are used for simultaneously
measuring drive motor's voltage and current.

CLEANING AND INSPECTIONS

• Vacuum out any aluminum shavings that may
have accumulated inside of the gun. ( See
Correcting Wire Shaving Issues in this section).
• Wipe off dust and debris.
• Check that the gun tube and its lock nut are
properly tightened to the cable connector.
• Replace any warning or product identification
decals that have become illegible.

P6 CONNECTOR PIN-OUT

TABLE D.1
Pin No. Function Gun Cable Lead Color
1 Trigger White
2 Trigger White
3 + Motor Red
4 - Motor Black
MASTER KEY
1 1
2 2
4 4
P6 CONNECTOR PINOUT

GAS DIFFUSER REPLACEMENT

This part may need to be replaced if it
has accumulated excessive spatter and
cannot be cleaned:
1. Remove gas nozzle and contact tip.
2. Carefully grasp gun tube with pliers
to prevent accidentally loosening gun
tube. Gas diffuser has right-hand
threads. Loosen gas diffuser with
wrench. (See Figure D.1)
FIGURE D.1
3. Install gas diffuser and thread into
place in gun tube. Tighten diffuser to
41 to 47 in.-lbs. with Torque Wrench.
D-1
LINER ASSEMBLY REPLACEMENT
OR CLEANING
1. Replacement liner assemblies are fac-
tory-made to the correct length. No cut-
ting is required. The same liner fits all
specified wire sizes and alloys:
2. Remove gas nozzle, contact tip, and
gas diffuser (see Gas Diffuser
Replacement in this Section). Remove
spool cover.
3. Liner removal: Grasp liner with Needle
3 3
nose pliers at point A. Gently work liner
toward cable connector until the liner is
loose in it. Be careful not to scrape
liner's gas-tight seal (point B) on con-
nector. Withdraw liner out of gun tube
(arrow C). (See figure D.2)
FIGURE D.2
C
3a. Clean out old liner by blowing out with
shop air or obtain a new replacement
liner.
4. Slide liner, seal-end first, into gun tube.
Grasp liner with pliers at
A. Gently push liner into connector.
B. Check that liner passes through slot
in wire feeder.
C. Stop pushing when liner is 1.00 to
1.25 inches from end of gun tube.
(See figure D.3)
FIGURE D.3
A
C
5. Liner installation: See step 4 above.
MAINTENANCE
6. Reinstall gas diffuser (see Figure D.1)
and thread into place. Allow the diffuser
to push the liner into its final position.
Tighten to 41 to 47 in.-lbs. with a torque
wrench.
7. Reinstall contact tip and gas nozzle.

DRIvE ROLL REPLACEMENT

1. The same drive roll fits all specified wire
sizes and alloys (See Table D.1).
2. Replace the drive roll if its feeding
groove has become worn or cannot be
cleaned of galled aluminum.
3. Drive roll removal: Remove wire from
the wire drive. Unlock drive roll by rotat-
ing twist-lock in either direction. (See
figure D.4 and figure D.5) .
B
4. Twist-lock is rotated to the locked posi-
tion, securing drive roll in place.
A
5. Twist-lock is rotated to the unlocked
position, allowing drive roll removal.
B
D-2
FIGURE D.4
Twist-lock
Locked position
FIGURE D.5
Twist-lock
Unlocked position