Lincoln Electric LT-7 User Manual
Page 2
LT-7 Tractor
www.lincolnelectric.com
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A CLOSER LOOK
REQUIRED OPTIONS
PERFORMANCE
• Solid-state control system precisely regulates procedures for
reliable starting and economical welding.
• Automatic compensation for input voltage and tractor loading
variations.
• Function lights built into the solid-state printed circuit boards aid
troubleshooting to minimize down time.
• Cross seam adjuster speeds setup and lets operator track
irregular joints while welding. Adjustment range is 3-1/8 in.
(79 mm) with clamp and 2-1/2 in. (63 mm) with handwheel.
• To perform a curved weld, the minimum diameter can be as small
as 10 ft. (3.0m) for an inside weld and 13 ft. (3.9m) for an outside
weld.
• To perform an inside circumferential weld, the minimum inside
diameter that can be welded is approximately 5 ft. (1.5m).
QUALITY AND RELIABILITY
• Three-year warranty on parts and labor.
• Manufactured under a quality system certified to ISO 9001
requirements.
• Rugged and durable design recognized throughout the industry
for its long life and years of trouble-free wire feeding.
FEATURES
• Quick, easy installation of optional guides for different joints.
• Reel holds 60 lb. (27.2 kg) solid wire coils.
• Flux hopper capacity of 15 lbs. (6.8 kg). Includes a manual flux
flow rate control valve and can be mounted at four locations to
the left or right.
• Continuous Vertical Adjustment: 1-1/2” (38 mm) handweel
variation for ESO (electrical stickout).
• Travel clutch operates from either side of the tractor.
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WELD POWER CABLES
CONTROL CABLES
Description
Order No.
Wire Feeder Control Cable
K1822-25 - 25 ft. (7.6m)
Wire Feeder Control Cable Extensions
K1797-25 - 25 ft. (7.6m)
K1797-50 - 50 ft. (15.2m)
Adapter Cable for Control Cable
K1798
to Terminal Strip Power Sources
Order No.
Description
K1842-10
Lug to Lug, 3/0, 600A, 60% duty cycle, 10 ft. (3.0m)
K1842-35
Lug to Lug, 3/0, 600A, 60% duty cycle, 35 ft. (10.6m)
K1842-60
Lug to Lug, 3/0, 600A, 60% duty cycle, 60 ft. (18.2m)
K1842-110
Lug to Lug, 4/0, 600A, 60% duty cycle, 110 ft. (33.5m)
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CONTACT NOZZLE ASSEMBLIES
Description/Diameter Wire
Order No.
Submerged Arc:
3/32” (2.4 mm)
K231-3/32
1/8” (3.2 mm)
K231-1/8
5/32” (4.0 mm)
K231-5/32
3/16” (4.8 mm)
K231-3/16
Positive:
3/32 - 1/8” (2.4 - 3.2 mm)
K148A
3/32 - 3/16” (2.4 - 4.8 mm)
K148B
Linc-Fill™ Attachments for Positive Contact Nozzle Asbly
Extension for K148
3/32” (2.4 mm)
K149-3/32
1/8” (3.2 mm)
K149-1/8
5/32” (4.0 mm)
K149-5/32