Lincoln Electric K3269-1, Руководство оператора

Страница: 27 / 118

MAINTENANCE
D-2
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
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
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
5. Liner installation: See step 4 above.
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) .
4. Twist-lock is rotated to the locked posi-
tion, securing drive roll in place.
FIGURE D.4
5. Twist-lock is rotated to the unlocked
position, allowing drive roll removal.
FIGURE D.5
MAINTENANCE
D-3
6. Drive roll may be removed with pliers, as
shown in figure D.6. It may be helpful to
relieve the idle roll tension during this
step.
FIGURE D.6
7. Clean the drive roll’s groove or obtain a
new replacement drive roll (if needed).
8. Install the drive roll by reversing the
above steps 1 thru 7. Either side of the
drive roll may be face-up.
IDLE ROLL ASSEMBLY
REPLACEMENT
1. Replace if it is degraded from use; for
example, it is becoming galled with alu-
minum deposits.
2. Remove drive roll. (See Maintenance
Section)
3. Remove both idle roll assembly retaining
screws and washers.(See figure D.7)
FIGURE D.7
4. Using Needle nose pliers, slowly pull the
idle roll assembly out of the wire drive by
equally working both sides of the tabbed
idle roll spring.
5. Insert the new idle roll assembly into the
wire drive with the correct orientation,
(See figures D.8 and D.9).
Correct orientation. Note that lower spring is
not visible in bore of idle roll bearing at
arrow.
FIGURE D.8
Incorrect orientation. Note that lower spring
is visible in bore of idle roll bearing at arrow.
FIGURE D.9
6. Using Needle nose pliers, push the new
idle roll assembly into the wire drive until
it is fully seated.
7. Reinstall the retaining screws and wash-
ers. Do not use the screws to draw the
idle roll into place. Reinstall the drive roll
and wire into the wire drive.
GUN TUBE ASSEMBLY
REPLACEMENT
1. Replace if it is degraded from use; for
example, its insulating tube is breaking
down.
2. Remove liner assembly. (See
Maintenance Section)
3. Remove left side of handle. Loosen gun
tube nut with wrench. Nut has right-hand
threads. Use adjustable pliers on gun tube
mounting plate to prevent cable assembly
from rotating in gun handle. (See figure
D.10)
FIGURE D.10
A
B
C
B
A
C
Twist-lock
Locked position
Twist-lock
Unlocked position
Idle Roll
Tension
Retaining screws
and washers
RIGHT
WRONG