Lincoln Electric LT-7 Service Manual page 49

C-27
LT-7 MODIFICATION FOR TWINARC® WELDING (CONT.)
3. Horizontal Fillet Welds (Tiny Twinarc)
a. The longer, 5 ft (1.5 m), kit wire guide tube
should be used in conjunction with the 4 ft
(1.2 m) tube to guide the wire off the right reel
for right side fillet-laps, and vice versa.
b. Install the kit stabilizer wheel attachment as
described in Butt Welds.
c. See the Setup for Horizontal Fillet Welding
for mounting instructions of the K232 Fillet /
Lap Guide.
d. Right side fillets are set up the same as sin-
gle wire right side fillets except for Step e-4
below.
e. Left side fillet-laps require the following mod-
ifications to the single wire setup procedure:
1. Remove the entire head assembly from
the clamp block on the cross seam
adjuster.
2. Reverse the mounting of the cross seam
adjuster on the LT-7 mast so it extends
toward the left with the clamp block hole
above the cross seam adjuster barrel.
Then re-install the head assembly. See
Figure C.33.
3. Bolt the kit head spring extender to the "L"
hole on the LT-7 head spring hook and
use the hole on the far end when installing
the head spring attachment. See Figure
C.34.
4. Remove the bearing roller from the rear
support wheel assembly (S15280) of the
K232 fillet kit. Transfer this roller to the
extended rear wheel support arm which is
part of the K277-1 or -2 horizontal fillet
kits.See Figure C.35.
NOTE: Step 4 is not necessary for right hand fil-
lets.
f. For left horizontal fillets install the Support Arm
assembly as shown in Figure C.35.
g. Adjust the head position with the cross seam
adjuster until the rear wheels are "toed"
approximately 1/2º to 1º into the vertical plate
as shown in Figure C.36.
ASSEMBLY
FIGURE C.33 - CROSS SEAM ADJ.
A d j u s t e r F R O N T V I E W B l o c k C l a m p F R O N T V I E W
C r o s s S e a m
Cross Seam
Adjuster
FIGURE C.34 - SPRING ExTENDER
S p r i n g E x t e n d e r
" R " " R "
" L " " L "
FIGURE C.35 - ExTENDED SUPPORT ARM
W h e e l R e a r
R o l l e r L e f t A s s e m b l y S u p p o r t A r m
Roller
FIGURE C.36 - HEAD ADJUSTMENT
R o l l e r R e a r S u p p o r t W h e e l P l a t e V e r t i c a l F i l l e t G u i d e
1 / 2 t o 1 ° D i r e c t i o n T r a v e l
Rear
Support
Roller
LT-7 TRACTOR
Clamp
Block
FRONT VIEW FRONT VIEW
"L" "L"
"R" "R"
Spring Extender
Support Arm
Assembly
Left
Rear
Wheel
1/2 to 1°
Travel
Direction
C-27
Vertical
Plate
Fillet Guide
Wheel