Lincoln Electric LT-7 Service Manual page 50

C-28
LT-7 MODIFICATION FOR TWINARC® WELDING (CONT.)
4. Horizontal Lap Welds (Tiny Twinarc)
Left and right lap welds are set up with the same
procedures and equipment used for single arc
horizontal fillets, except:
a. The fillet wheel yoke is replaced by the lap
wheel yoke (single grooved wheel) - part of
the K232 kit.
1. The lap wheel yoke mounts with the wheel
on the right of yoke for left laps (vice versa
for right laps.)
2. The lap wheel rides on the corner of the top
plate of the lap joint. See Figure C.37.
b. The rear fillet support wheel attachment is not
required. For left laps the left rear wheel should
be approximately 8" (2.4 m) from the seam, and
for right laps the right rear wheel should be 5"
(1.5 m) from the seam.
FIGURE C.38 - TINY TWINARC® FLAT FILLET FINAL ASSEMBLY
W h e e l A s b y . 4 5 ° F r o n t 4 5 ° S 1 6 0 2 5 S 1 5 2 7 9 W h e e l S u p p o r t
R e a r W i r e R e e l R e e l A s b y . D u a l W i r e M 1 3 3 9 6 B r a c k e t E x t e n d e r L 5 6 2 9
45° Front
Wheel Asby.
S16025
ASSEMBLY
Rear
Support
Wheel
S15279
45°
LT-7 TRACTOR
FIGURE C.37 - LAP WHEEL
Adjustable Arm
L e f t S i d e L a p W e l d
P l a t e B o t t o m P l a t e T o p G u i d e W h e e l Y o k e
A d j u s t a b l e A r m
Top
Guide Wheel
Plate
Bottom Plate
Left Side Lap Weld
Dual Wire
Reel Asby.
L5629
Wire Reel
Extender
Bracket
M13396
C-28
Yoke