Lincoln Electric LT-7 Technical Specifications

The LT-7 Tractor is a self-propelled mechanized wire feeder, designed for the submerged arc process with track system capabilities. It is self-guiding and easy to operate – only one operator is usually required. It is designed to be used with a variety of Lincoln DC constant voltage and constant current power sources. The rugged, lightweight unit permits quick movement to the next joint. Its compact size fits through small openings and confined spaces. Butt and fillet welds can be made on heavy plate or steel as light as 12 gauge (2.5mm). The LT-7 Tractor is ideal for the following applications: ship and barge building, storage tank erection, bridge deck installation, beam, girder or column fabrication, and long seams on heavy weldments. Publication E9.70 12/03 www.lincolnelectric.com Processes Advantage Lincoln Order TECHNICAL SPECIFICATIONS Recommended General Options • LT-7 Tractor feeds 3/32 to 3/16” (2.4 to 4.8 mm) solid wires, from 100 - 400 inches per minute (2.5 - 10.2 m/min) wire feed speed. • Calibrated tractor drive adjusts travel speeds from 6 to 70 inches per minute (0.12 to 1.8 m/min). • Vertical head lift adjuster for adjusting electrical stickout from 1/2 in. to 5 in. (12.7 to 127.0 mm). • Weld angle is up to 50° from vertical on either side; drag angle is up to 30° from vertical. • Control box is conveniently located on the tractor (can be mounted either left or right), eliminating the need to return to the power source for routine procedure changes. • Exceptional tracking control and self-steering in most applications leave the operator free for quality control, joint cleaning and flux handling. • Welds butts, horizontal fillet and lap joints to the left or right side of the tractor frame for convenience. • Close mechanical alignment between wire and joint maximizes weld quality with no fixturing costs. • Three-year warranty on parts and labor. Recommended Power Sources AUTOMATIC WIRE FEEDERS 115 VAC K227-1 LT-7 Standard Model K395-1 LT-7 Track Model Wire Feeder Control Cable Extensions, Adapter Cable, Linc-Fill™ Attachments, Horizontal Fillet and Lap Adapter Kit, Flat Fillet Adapter Kit, Butt Seam Guide Kit, Track Conversion Kit, Tiny Twinarc® Adapter Kit, Track Section, Flux Screen, Magnetic Flux Screen Separator, Concentric Flux Cone Assembly Required Options Control Cable, Weld Power Cable, Contact Nozzle Assembly CV-655, DC-600, DC-655, DC-1000, DC-1500 Wire Feed Wire Size Range Dimensions Net Product Product Input Rated Output Speed Range Solid H x W x D Weight Name Number Power Current/Duty Cycle ipm (m/min) in. (mm) in. (mm) lbs. (kg) LT-7 K227-1 115 VAC 600A/100% 100 - 400 3/32 - 3/16” 27.5 x 33 x 14 120 Standard 50/60 Hz 1100A/100% (with (2.5 - 10.2) (2.4 - 4.8) (698 x 838 x 356) (54) LT-7 K395-1 water cooling) 130 Track (59) Track Model Shown

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. 4 5 6 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) 4 5 6 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

Adapter Kit Includes a rear guide wheel, head tension spring and front guide wheel assembly on an adjustable arm which rides in the joint to maintain alignment and electrode angle. Kit includes separate front guide wheel assemblies for fillet and lap joints. Welds to the left or right of the tractor’s center line. Order K232 Flat Fillet Adapter Kit Includes front and rear guide wheels for operating the tractor in 30° or 45° flat fillet joints. Order K229 Butt Seam Guide Kit Mount in place of the standard front wheel to ride in a V-groove or open 1/8 - 3/8” (3.2 - 9.5 mm) butt joint, keeping the wire in required alignment. Order K230 Track Conversion Kit Converts the LT-7 standard model for track guidance. Shown with K396 track section. Order K400 GENERAL OPTIONS Tiny Twinarc Adapter Kit Converts the LT-7 standard model to Tiny Twinarc using 5/64” (2.0 mm) electrode. These kits may also be used for horizontal fillets with the addition of the K232 Adapter Kit. Order K277-1 for Butt Seams Order K277-2 for Flat Fillets Track Section Each provides 70 in. (1.8m) of travel. To be used with the K395-1, LT-7 Track Model. Order K396 Flux Screen For submerged arc welding. Removes large particles from reused flux. Includes air-driven vibrator. Order K310 Magnetic Flux Screen Separator For submerged arc welding. Removes foreign magnetic particles from reused flux. Order K58 Concentric Flux Cone Assembly For use with the K148B, Positive Contact Nozzle Assembly. Gives concentric flux coverage around the electrode. Order K285 K396

K227-1 LT-7 TRACK MODEL K395-1 REQUIRED OPTIONS Control Cable See Page 2 Weld Power Cable See Page 2 Contact Nozzle Assembly See Page 2 RECOMMENDED GENERAL OPTIONS Wire Feeder Control Cable Extensions See Page 2 Adapter Cable See Page 2 Linc-Fill™ Attachments See Page 2 Horizontal Fillet and Lap Adapter Kit K232 Flat Fillet Adapter Kit K229 Butt Seam Guide Kit K230 Track Conversion Kit K400 Tiny Twinarc Adapter Kit, for Butt Seams K277-1 Tiny Twinarc Adapter Kit, for Flat Fillets K277-2 Track Section K396 Flux Screen K310 Magnetic Flux Screen Separator K58 Concentric Flux Cone Assembly K285 RECOMMENDED POWER SOURCES CV-655 see publication E4.40 DC-600 see publication E5.40 DC-655 see publication E5.46 DC-1000 see publication E5.50 DC-1500 see publication E5.60 TOTAL: THE LINCOLN ELECTRIC COMPANY 22801 St. Clair Ave., Cleveland, OH 44117-1199 • 216.481.8100 • www.lincolnelectric.com LT-7 TRACTOR ORDER FORM PRODUCT DESCRIPTION ORDER NUMBER QUANTITY PRICE C U S T O M E R A S S I S T A N C E P O L I C Y The business of The Lincoln Electric Company is manufacturing and selling high quality welding equipment, consumables, and cutting equipment. Our challenge is to meet the needs of our customers and to exceed their expectations. On occasion, purchasers may ask Lincoln Electric for advice or information about their use of our products. We respond to our customers based on the best information in our possession at that time. Lincoln Electric is not in a position to warrant or guarantee such advice, and assumes no liability, with respect to such information or advice. We expressly disclaim any warranty of any kind, including any warranty of fitness for any customer’s particular purpose, with respect to such information or advice. As a matter of practical consideration, we also cannot assume any responsibility for updating or correcting any such information or advice once it has been given, nor does the provision of information or advice create, expand or alter any warranty with respect to the sale of our products. Lincoln Electric is a responsive manufacturer, but the selection and use of specific products sold by Lincoln Electric is solely within the control of, and remains the sole responsibility of the customer. Many variables beyond the control of Lincoln Electric affect the results obtained in applying these types of fabrication methods and service requirements. Subject to Change – This information is accurate to the best of our knowledge at the time of printing. Please refer to www.lincolnelectric.com for any updated information.