Procedure For Changing Drive And Idle Roll Sets; Wire Reel Loading - Readi Reels, Spools Or Coils; To Mount A 30 Lb. (14 Kg) Readi-Reel Package (Using The; Or 14 Lb (6 Kg) Innershield Coils - Lincoln Electric POWER MIG SVM170-A Service Manual

B-5
PROCEDURE FOR CHANGING
DRIVE AND IDLE ROLL SETS
1. Turn off the power source.
2. Release the pressure on the idle roll by swinging the
adjustable pressure arm down toward the back of
the machine. Lift the cast idle roll assembly and
allow it to sit in an upright position.
3. Remove the outside wire guide retaining plate by
loosening the two large knurled screws.
4. Twist the drive roll retaining mechanism to the
unlocked position as shown below and remove the
drive roll. (See Figure B.2)
FIGURE B.2
5. Remove the inside wire guide plate.
6. Replace the drive and idle rolls and inside wire
guide with a set marked for the new wire size.
NOTE: Be sure that the gun liner and contact tip are
also sized to match the selected wire size.
7. Manually feed the wire from the wire reel, over the
drive roll groove and through the wire guide and
then into the brass bushing of the gun and cable
assembly.
8. Replace the outside wire guide retaining plate by
tightening the two large knurled screws. Reposition
the adjustable pressure arm to its original position
to apply pressure. Adjust pressure as necessary.
WIRE REEL LOADING - READI
REELS, SPOOLS OR COILS

To Mount a 30 Lb. (14 kg) Readi-Reel Package (Using the

Molded Plastic K363-P Readi-Reel Adapter:)
1. Open the Wire Drive Compartment Door
2. Depress the Release Bar on the Retaining Collar
and remove it from the spindle.
3. Place the Optional Adapter on the spindle
4. Re-install the Retaining Collar. Make sure that the
Release Bar "pops up" and that the collar retainers
fully engage the retaining ring groove on the spindle.
OPERATION
5. Rotate the spindle and adapter so the retaining spring is
at the 12 o'clock position.
6. Position the Readi-Reel so that it will rotate in a direction
when feeding so as to be de- reeled from top of the coil.
7. Set one of the Readi-Reel inside cage wires on the slot in
the retaining spring tab.
8. Lower the Readi-Reel to depress the retaining spring and
align the other inside cage wires with the grooves in the
molded adapter.
9. Slide cage all the way onto the adapter until the retaining
spring "pops up" fully.
CHECK TO BE SURE THE RETAINING SPRING HAS
FULLY RETURNED TO THE LOCKING POSITION AND
HAS SECURELY LOCKED THE READI-REEL CAGE IN
PLACE. RETAINING SPRING MUST REST ON THE CAGE,
NOT THE WELDING ELECTRODE.
---------------------------------------------------------------
10. To remove Readi-Reel from Adapter, depress
retaining spring tab with thumb while pulling the
Readi-Reel cage from the molded adapter with
both hands. Do not remove adapter from spindle.
To Mount 10 to 44 Lb. (4.5-20 kg) Spools (12"/300
mm Diameter) or 14Lb.(6 Kg) Innershield Coils:
(For 13-14 lb. (6 Kg) Innershield coils, a K435 Coil
Adapter must be used).
(For 10 lb.(4.5 Kg) 8 inch(203mm) diameter spools, a
K468 spindle adapter must be used).
1. Open the Wire Drive Compartment Door
2. Depress the Release Bar on the Retaining Collar
and remove it from the spindle.
3. Place the spool on the spindle making certain the
spindle brake pin enters one of the holes in the back
side of the spool (Note: an arrow mark on the spin-
dle lines up with the brake holding pin to assist in lin-
ing up a hole). Be certain the wire comes off the reel
in a direction so as to de-reel from the top of the coil.
4. Re-install the Retaining Collar. Make sure that the
Release Bar "pops up" and that the collar retainers
fully engage the retaining ring groove on the spindle.
POWER MIG 255C
WARNING
ADAPTER
2 IN. O.D.
SPINDLE
RETAINING
SPRING
RETAINING
COLLAR
BRAKE
HOLDING
PIN
GROOVES
READI-REEL
INSIDE
CAGE
RELEASE
WIRES
BAR
B-5