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Lincoln Electric LF-72/74 manual

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Table of contents for the manual

  • Page 1

    LF- 72/74 SVM171-A January , 2007 Safety Depends on Y ou Lincoln arc welding and cutting equipment is designed and built with safety in mind. However , your overall safety can be increased by pr oper installation ... and thoughtful operation on your part. DO NOT INST ALL, OPERA TE OR REP AIR THIS EQUIPMENT WITHOUT READ- ING THIS MANUAL AND THE SAFE[...]

  • Page 2

    Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC FOR ENGINE powered equipment. 1.a. T urn the engine off before troubleshooting and maintenance work unless the maintenance work requires it to be running. ____________________________________________________ 1.b. Operate engines in open, w[...]

  • Page 3

    Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC ARC RA YS can burn. 4.a. Use a shield with the proper filter and cover plates to protect your eyes from sparks and the rays of the arc when welding or observing open arc welding. Headshield and filter lens should conform to ANSI Z87. I sta[...]

  • Page 4

    Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC FOR ELECTRICALL Y powered equipment. 8.a. T urn of f input power using the disconnect switch at the fuse box before working on the equipment. 8.b. Install equipment in accordance with the U.S. National Electrical Code, all local codes and [...]

  • Page 5

    Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC PRÉCAUTIONS DE SÛRETÉ Pour votre propre protection lire et observer toutes les instructions et les précautions de sûreté specifiques qui parraissent dans ce manuel aussi bien que les précautions de sûreté générales suiv- antes: [...]

  • Page 6

    LF-72/74 MASTER T ABLE OF CONTENTS FOR ALL SECTIONS Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . i-iv Installation LF-72 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Section A Installation LF-74 . . . . . . . . . . . . . . . . . [...]

  • Page 7

    Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC LF-72/74 SINGLE/DUAL Section A-1 Section A-1 T ABLE OF CONTENTS - INST ALLA TION SECTION - Installation ..............................................................................................................Section A T echnical Spec[...]

  • Page 8

    LF-72/74 Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T OC Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC A-2 INST ALLA TION A-2 TECHNICAL SPECIFICA TIONS : LF-72 Wire Feeder SPEC.# TYPE WIRE FEED SPEED RANGE ∆ Dime[...]

  • Page 9

    A-3 A-3 LF-72/74 Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T OC Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC INST ALLA TION SAFETY PRECAUTION LOCA TION The LF-72 may be placed on a bench or mounted on top of a we[...]

  • Page 10

    INST ALLA TION LF-72/74 A-4 A-4 Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T OC Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC BENCH MOUNT The LF-72 mounts in a variety of configurations. As s hipped from the factor[...]

  • Page 11

    LF-72/74 INST ALLA TION A -5 A-5 Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T OC Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC SAFETY PRECAUTION ELECTRIC SHOCK can kill. • Only qualified personnel should perform [...]

  • Page 12

    LF-72/74 INST ALLA TION A-6 A-6 Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T OC Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC COAXIAL WELD CABLES C oaxial welding cables are specially designed welding cables for pu[...]

  • Page 13

    LF-72/74 INST ALLA TION A-7 A-7 Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T OC Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC ANALOG CONTROL CABLE CONTROL CABLE CONNECTIONS • All control cables can be connected e[...]

  • Page 14

    LF-72/74 NOTES A-8 A-8 Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T OC Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC ANALOG MILLER CONTROL CABLE ADAPTER K2335-1 This Lincoln Electric wire feeder may be mounted to a[...]

  • Page 15

    LF-72/74 INST ALLA TION A-9 A-9 Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T OC Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC WELDING GUN/WIRE FEEDER TRIGGER CONNECTOR Wire Feeder Pin Function A Gun T rigger B- C C[...]

  • Page 16

    LF-72/74 INST ALLA TION A-10 A-10 Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T OC Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC WELDING GUNS, TORCHES AND ACCES- SORIES GUN RECEIVER BUSHING The LF-72 wire feeder com[...]

  • Page 17

    LF-72/74 INST ALLA TION A-11 A-11 Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T OC Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC WIRE DRIVE CONFIGURA TION (See Figure A.5) C hanging the Gun Receiver Bushing ELECTRIC[...]

  • Page 18

    LF-72/74 INST ALLA TION A-12 A-12 Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T OC Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC PRESSURE ARM ADJUSTMENT ELECTRIC SHOCK can kill. • T urn the input power OFF at the [...]

  • Page 19

    LF-72/74 INST ALLA TION A-13 A-13 Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T OC Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC 3. Re-install the retaining collar . Make sure that the r elease bar snaps out and tha[...]

  • Page 20

    LF-72/74 INST ALLA TION A-14 A-14 Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T OC Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC WELD WIRE ROUTING The electrode supply may be either from reels, Readi- Reels, spools,[...]

  • Page 21

    LF-72/74 INST ALLA TION A-15 A-15 Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T OC Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC SHIELDING GAS CONNECTION C YLINDER may explode if damaged. • Keep cylinder upright a[...]

  • Page 22

    LF-72/74 INST ALLA TION A-16 A-16 Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T OC Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC INST ALLING ELECTRODE CONDUIT KITS ELECTRIC SHOCK can kill. • T urn the input power [...]

  • Page 23

    LF-72/74 INST ALLA TION A-17 A-17 Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T OC Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC ALUMINUM WIRE PREP ARA TIONS ELECTRIC SHOCK can kill. • T urn the input power OFF at[...]

  • Page 24

    LF-72/74 INST ALLA TION A-18 A-18 Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T OC Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC BENCH MODEL ST ANDARD DUTY BENCH MODEL HEA VY DUTY BASE MODEL[...]

  • Page 25

    LF-72/74 INST ALLA TION A-19 A-19 Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T OC Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC TYPICAL SYSTEM CONFIGURA TIONS The LF-72 is capable of welding with many different wel[...]

  • Page 26

    LF-72/74 NOTES A-20 A-20 Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T OC Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC[...]

  • Page 27

    Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC LF-72/74 SINGLE/DUAL Section B-1 Section B-1 T ABLE OF CONTENTS - OPERA TION SECTION - Operation ................................................................................................................Section B Safety Precautions .[...]

  • Page 28

    Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T OC Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC B-2 B-2 LF-72/74 OPERA TION COLD FEED POSITIVE OUTPUT NEGA TIVE OUTPUT PROTECTIVE GROUND W ARNING OR CAUTION DANGEROUS V[...]

  • Page 29

    LF-72/74 OPERA TION B-3 B-3 Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T OC Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC COMMON WELDING ABBREVIA TIONS WFS • Wire Feed Speed CV • Constant V oltage GMA W (MIG) ?[...]

  • Page 30

    OPERA TION LF-72/74 B-4 B-4 Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T OC Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC ITEM DESCRIPTION 1 Location for Optional Remote V oltage Control (See Accessory Section For [...]

  • Page 31

    Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T OC Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC OPERA TION B-5 B-5 LF-72/74 SINGLE/DUAL 1. REMOTE VOL T AGE CONTROL KIT The o ptional r emote voltage control kit adjust[...]

  • Page 32

    LF-72/74 OPERA TION B-6 B-6 Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T OC Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC T rigger Interlock T rigger Interlock operation provides for operator com- fort when making [...]

  • Page 33

    Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC LF-72/74 SINGLE/DUAL Section C-1 Section C-1 T ABLE OF CONTENTS - ACCESSORIES SECTION - Accessories ............................................................................................................Section C General Options / Acc[...]

  • Page 34

    LF-72/74 ACCESSORIES C-2 C-2 Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T OC Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC OPTIONAL KITS: K 2329-1 K2330-1 K2328-1 K2331-1 K2332-1 K1796-xx K1803-1 K1840-xx K1841-xx [...]

  • Page 35

    LF-72/74 ACCESSORIES C-3 C-3 Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T OC Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC OPTIONAL KITS: K1797-xx K2335-1 K1520-1 K1798 K910-1 K910-2 K1500-1 K1500-2 (standard on al[...]

  • Page 36

    LF-72/74 ACCESSORIES C-4 C-4 Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T OC Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC OPTIONAL KITS: K489-7 K466-2 K613-7 K1546-1 K1546-2 K435 K468 K363P K438 K1504-1 Gun Receiv[...]

  • Page 37

    LF-72/74 ACCESSORIES C-5 C-5 Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T OC Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC OPTIONAL KITS: K1634-1 K1634-2 K659-1 3000290 K586-1 K1524-3 K163 K1557-1 K1556-1 K1555-1 P[...]

  • Page 38

    LF-72/74 NOTES C-6 C-6 Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T OC Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC[...]

  • Page 39

    Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC LF-72/74 SINGLE/DUAL Section D-1 Section D-1 T ABLE OF CONTENTS - MAINTENANCE SECTION - Maintenance ...........................................................................................................Section D Safety Precautions ...[...]

  • Page 40

    D-2 D-2 LF-72/74 Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T OC Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC MAINTENANCE MAINTENANCE Safety Precautions ELECTRIC SHOCK can kill. • Do not touch electrically live [...]

  • Page 41

    MAINTENANCE D-3 D-3 Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T OC Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC LF-72/74 SINGLE/DUAL 4. Open the idle arm. 5. T urn power on to the LF-72. 6. Adjust the WFS knob to[...]

  • Page 42

    LF-72/74 MAINTENANCE D-4 D-4 Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T OC Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC 3 1 4 2 1. Center Assembly 2. Wire Drive Assembly 3. Wire Reel Stand LF-72 4. Wire Reel Sta[...]

  • Page 43

    Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC LF-72/74 Section AA-1 Section AA-1 T ABLE OF CONTENTS - INST ALLA TION SECTION - Installation ............................................................................................................Section AA T echnical Specifications [...]

  • Page 44

    LF-72/74 INST ALLA TION AA-2 AA-2 Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T OC Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC TECHNICAL SPECIFICA TIONS : LF-74 Wire Feeder SPEC.# TYPE WIRE FEED SPEED RANGE ITEMS [...]

  • Page 45

    LF-72/74 INST ALLA TION AA-3 AA-3 Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T OC Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC SAFETY PRECAUTION LOCA TION The LF-74 may be placed on a bench, mounted on top of a we[...]

  • Page 46

    LF-72/74 INST ALLA TION AA-4 AA-4 Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T OC Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC BENCH MOUNT The LF-74 mounts in a variety of configurations. As s hipped from the fact[...]

  • Page 47

    LF-72/74 INST ALLA TION AA-5 AA-5 Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T OC Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC SAFETY PRECAUTION ELECTRIC SHOCK can kill. • Only qualified personnel should perform[...]

  • Page 48

    LF-72/74 INST ALLA TION AA-6 AA-6 Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T OC Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC COAXIAL WELD CABLES Coaxial welding cables are specially designed welding cables for p[...]

  • Page 49

    LF-72/74 INST ALLA TION AA-7 AA-7 Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T OC Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC ANALOG CONTROL CABLE CONTROL CABLE CONNECTIONS K1797-xx The control cable connecting t[...]

  • Page 50

    LF-72/74 INST ALLA TION AA-8 AA-8 Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T OC Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC ANALOG MILLER CONTROL CABLE ADAPTER K2335-1 This Lincoln Electric wire feeder may be m[...]

  • Page 51

    LF-72/74 INST ALLA TION AA-9 AA-9 Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T OC Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC WELDING GUN/WIRE FEEDER TRIGGER CONNECTOR Wire Feeder Pin Function A Gun T rigger B- C[...]

  • Page 52

    LF-72/74 INST ALLA TION AA-10 AA-10 Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T OC Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC WELDING GUNS, TORCHES AND ACCES- SORIES GUN RECEIVER BUSHING The LF-74 wire feeder c[...]

  • Page 53

    LF-72/74 INST ALLA TION AA-11 AA-11 Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T OC Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC Gun Receiver For use With Bushing K1500-1 K466-1 Lincoln gun connectors; Innershield[...]

  • Page 54

    LF-72/74 INST ALLA TION AA-12 AA-12 Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T OC Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC ASSEMBL Y OF DRIVE ROLLS AND WIRE GUIDES ELECTRIC SHOCK can kill. • T urn the inpu[...]

  • Page 55

    PRESSURE ARM ADJUSTMENT ELECTRIC SHOCK can kill. • T urn the input power OFF at the welding power s ource before installation or changing drive rolls and/or guides. • Do not touch electrically live parts. • When inching with the gun trigger , electrode and drive mechanism are "hot" to work and ground and could remain energized sever[...]

  • Page 56

    LF-72/74 INST ALLA TION AA-14 AA-14 Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T OC Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC SHIELDING GAS CONNECTION C YLINDER may explode if damaged. • Keep cylinder upright[...]

  • Page 57

    LF-72/74 INST ALLA TION AA-15 AA-15 Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T OC Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC 3. Re-install the retaining collar . Make sure that the release bar snaps out and th[...]

  • Page 58

    LF-72/74 INST ALLA TION AA-16 AA-16 Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T OC Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC WELD WIRE ROUTING The electrode supply may be either from reels, Readi- Reels, spool[...]

  • Page 59

    LF-72/74 INST ALLA TION AA-17 AA-17 Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T OC Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC INST ALLING ELECTRODE CONDUIT KITS ELECTRIC SHOCK can kill. • T urn the input powe[...]

  • Page 60

    LF-72/74 INST ALLA TION AA-18 AA-18 Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T OC Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC ALUMINUM WIRE PREP ARA TIONS ELECTRIC SHOCK can kill. • T urn the input power OFF [...]

  • Page 61

    LF-72/74 INST ALLA TION AA-19 AA-19 Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T OC Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC BENCH MODEL WITH HEA VY DUTY WIRE ST AND (K2426-2) EXTRA T ORQUE BENCH MODEL WITH HE[...]

  • Page 62

    LF-72/74 INST ALLA TION AA-20 AA-20 Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T OC Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC 2B 2B 4A 4A 1C 1C 4B 4B 5 5 2A 2A COMMON EQUIPMENT SET -UPS FIGURE AA.14 GENERAL F A[...]

  • Page 63

    LF-72/74 INST ALLA TION AA-21 AA-21 Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T OC Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC Item 1A 1B 1C - 1D 2 3 4 5A 5B 6 7 8 9 10 1 1 K# K2426-1 K1797-xx See Welding Gun Li[...]

  • Page 64

    LF-72/74 INST ALLA TION AA-22 AA-22 Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T OC Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC Item 1 2 3A 3C 3D 4 5A 5C 6 7 7A 8 9 10 K# See Welding Gun Literature K2329-1 K2426-[...]

  • Page 65

    Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC POWER FEED 10M SINGLE/DUAL Section BB-1 Section BB-1 T ABLE OF CONTENTS - OPERA TION SECTION - Operation ..............................................................................................................Section BB Safety Precau[...]

  • Page 66

    LF-72/74 OPERA TION BB-2 BB-2 Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T OC Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC SAFETY PRECAUTIONS Read this entire section of operating instructions b efore operating th[...]

  • Page 67

    LF-72/74 OPERA TION BB-3 BB-3 Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T OC Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC G eneral Functional Description The LF-74 fulfills the need for an economical wire feed- e[...]

  • Page 68

    LF-72/74 OPERA TION BB-4 BB-4 Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T OC Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC ITEM DESCRIPTION 1 Wire Feed Speed Knob. 2 Location for Optional Remote V oltage Control ([...]

  • Page 69

    LF-72/74 OPERA TION BB-5 BB-5 Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T OC Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC 1. WIRE FEED SPEED KNOB T he large, calibrated wire feed speed knob makes for easy and acc[...]

  • Page 70

    LF-72/74 OPERA TION BB-6 BB-6 Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T OC Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC 6. 2 STEP - TRIGGER INTERLOCK SWITCH T he 2 Step - T rigger Interlock switch changes the f[...]

  • Page 71

    Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC POWER FEED 10M SINGLE/DUAL Section CC-1 Section CC-1 T ABLE OF CONTENTS - ACCESSORIES SECTION - Accessories .........................................................................................................Section CC General Options[...]

  • Page 72

    LF-72/74 ACCESSORIES CC-2 CC-2 Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T OC Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC OPTIONAL KITS: K2329-1 K2330-1 K2328-1 K2331-1 K2332-1 K1796-xx K1803-1 K1840-xx K1841-xx[...]

  • Page 73

    LF-72/74 ACCESSORIES CC-3 CC-3 Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T OC Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC OPTIONAL KITS: K1797-xx K2335-1 K1520-1 K1798 K910-1 K910-2 K1500-1 K1500-2 (standard on [...]

  • Page 74

    LF-72/74 ACCESSORIES CC-4 CC-4 Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T OC Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC OPTIONAL KITS: K489-7 K466-2 K613-7 K1546-1 K1546-2 K435 K468 K468-1 K363P K438 K1504-1 G[...]

  • Page 75

    LF-72/74 ACCESSORIES CC-5 CC-5 Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T OC Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC OPTIONAL KITS: K1634-1 K1634-2 K659-1 3000290 K586-1 K1524-3 K163 K1557-1 K1556-1 K1555-1[...]

  • Page 76

    LF-72/74 NOTES CC-6 CC-6 Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T OC Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC[...]

  • Page 77

    Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC POWER FEED 10M SINGLE/DUAL Section DD-1 Section DD-1 T ABLE OF CONTENTS - MAINTENANCE SECTION - Maintenance ........................................................................................................Section DD Safety Precautio[...]

  • Page 78

    LF-72/74 MAINTENANCE DD-2 DD-2 Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T OC Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC MAINTENANCE Safety Precautions ELECTRIC SHOCK can kill. • Do not touch electrically liv[...]

  • Page 79

    LF-72/74 MAINTENANCE DD-3 DD-3 Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T OC Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC FIGURE DD.1 FIGURE DD.2 J2 CONNECTOR[...]

  • Page 80

    LF-72/74 MAINTENANCE DD-4 DD-4 Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T OC Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC 3 1 4 2 1. Center Assembly 2. Wire Drive Assembly 3. Wire Reel Stand LF-72 4. Wire Reel S[...]

  • Page 81

    Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC LF-72/74 SINGLE/DUAL Section E-1 Section E-1 Theory of Operation ...............................................................................................Section E General Description .................................................[...]

  • Page 82

    F IGURE E.2 GENERAL DESCRIPTION & INPUT RECEPT ACLE, CONTROL BOARD AND OPERA TOR CONTROLS 14 PIN INPUT CABLE R ECEPTACLE 2 4/42 VAC CONTROL BOARD WIRE FEED SPEED POT. TRIGGER INTERLOCK 2-STEP C OLD FEED GAS PURGE OPTIONAL BURNBACK TIMER OPTIONAL REMOTE VOLTAGE C ONTROL GAS SOLENOID 3.75 AMP OVERLOAD PROTECTION WIRE DRIVE RECEPTACLE WIRE DRIVE M[...]

  • Page 83

    LF-72/74 THEOR Y OF OPERA TION DRIVE MOTOR, T ACH FEEDBACK AND GAS SOLENOID The leads to the drive motor , gas solenoid and the tach (hall effect device LF-74 and LF-72 above codes 11290) are br ought into the control box via the 14 pin receptacle. This 14 pin r eceptacle also houses the gun trigger leads and the voltage sense leads. When the gun t[...]

  • Page 84

    LF-72/74 NOTES E-4 E-4 Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T OC Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC[...]

  • Page 85

    Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC LF-72/74 SINGLE/DUAL Section F-1 Section F-1 T ABLE OF CONTENTS - TROUBLESHOOTING & REP AIR SECTION - T roubleshooting & Repair Section ........................................................................Section F How to Use T [...]

  • Page 86

    HOW TO USE TROUBLESHOOTING GUIDE Service and repair should be performed by only Lincoln Electric Factory T rained Personnel. Unauthorized repairs performed on this equipment may r esult in danger to the technician and machine operator and will invalidate your factory warranty . For your safety and to avoid Electrical Shock, please observe all safet[...]

  • Page 87

    LF-72/74 Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T OC Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC TROUBLESHOOTING & REP AIR F-3 F-3 Sometimes machine failures appear to be due to PC board failures. These p[...]

  • Page 88

    Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T OC Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC TROUBLESHOOTING & REP AIR F-4 F-4 PROBLEMS (SYMPTOMS) POSSIBLE AREAS OF MISADJUSTMENT(S) RECOMMENDED COURSE OF ACTIO[...]

  • Page 89

    The arc burns back to the tip. The gas continues to flow for a long time after the weld. 1. If timer kit is installed, reduce the amount of burnback time. 2. If the timer kit is installed, reduce the amount of post flow time. Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T OC Re t [...]

  • Page 90

    LF-72/74 TROUBLESHOOTING & REP AIR F-6 F-6 Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T OC Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC LF-72/74 Observe Safety Guidelines detailed in the beginning of this manu[...]

  • Page 91

    Service and repair should be performed by only Lincoln Electric factory trained personnel. Unauthorized repairs performed on this equipment may result in danger to the technician or machine operator and will invalidate your factory warranty . For your safety and to avoid electrical shock, please observe all safety notes and pre- cautions detailed t[...]

  • Page 92

    LF-72/74 F-8 F-8 Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T OC Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC TROUBLESHOOTING & REP AIR TEST PROCEDURE 1. Remove power from the LF72/LF74 wir e drive unit. 2. Us[...]

  • Page 93

    LF-72/74 F-9 F-9 Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T OC Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC TROUBLESHOOTING AND REP AIR Service and repair should be performed by only Lincoln Electric factory tra[...]

  • Page 94

    LF-72/74 F-10 F-10 Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T OC Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC TROUBLESHOOTING AND REP AIR GAS SOLENOID 552B 552 553 Off = 0 VDC OCV = 59 VDC On = 7.7 VDC Located o[...]

  • Page 95

    LF-72/74 F-11 F-11 Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T OC Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC TROUBLESHOOTING AND REP AIR Service and repair should be performed by only Lincoln Electric factory t[...]

  • Page 96

    LF-72/74 F-12 F-12 Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T OC Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC TROUBLESHOOTING AND REP AIR 552A 552B + - 580 42 41 DIODE BRIDGE TEST (continued) FIGURE F .4 – CON[...]

  • Page 97

    LF-72/74 F-13 F-13 Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T OC Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC TROUBLESHOOTING AND REP AIR Service and repair should be performed by only Lincoln Electric factory t[...]

  • Page 98

    LF-72/74 F-14 F-14 Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T OC Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC 577 576 575 0 VDC MIN. WFS 5 VDC MIN. WFS 10K/2W WIRE FEED SPEED CONTROL POTENTIOMETER TEST PROCEDURE[...]

  • Page 99

    LF-72/74 F-15 F-15 Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T OC Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC TROUBLESHOOTING AND REP AIR Service and repair should be performed by only Lincoln Electric factory t[...]

  • Page 100

    LF-72/74 F-16 F-16 Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T OC Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC REMOV AL PROCEDURE 1. Remove the input power ( 42V AC ) from the LN72/LN74 unit. 2. Using the 5/16 nu[...]

  • Page 101

    LF-72/74 F-17 F-17 Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T OC Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC TROUBLESHOOTING AND REP AIR Service and repair should be performed by only Lincoln Electric factory t[...]

  • Page 102

    LF-72/74 F-18 F-18 Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T OC Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC TROUBLESHOOTING AND REP AIR WIRE DRIVE MOT OR AND GEAR BOX REMOV AL AND REPLACEMENT PROCEDURE (Contin[...]

  • Page 103

    LF-72/74 F-19 F-19 Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T OC Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC TROUBLESHOOTING AND REP AIR WIRE DRIVE MOT OR AND GEAR BOX REMOV AL AND REPLACEMENT PROCEDURE (Contin[...]

  • Page 104

    LF-72/74 TROUBLESHOOTING AND REP AIR F-20 F-20 Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T OC Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC WIRE DRIVE MOT OR AND GEAR BOX REMOV AL AND REPLACEMENT PROCEDURE (Contin[...]

  • Page 105

    LF-72/74 TROUBLESHOOTING AND REP AIR F-21 F-21 Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T OC Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC RETEST AFTER REP AIR Retest a machine: • If it is rejected under test f[...]

  • Page 106

    LF-72/74 NOTES F-22 F-22 Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T OC Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T O C Re tur n t o Ma ste r T OC[...]

  • Page 107

    LF-72/74 Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T OC Re tur n to Ma st e r T OC Section G-1 Section G-1 T ABLE OF CONTENTS - ELECTRICAL DIAGRAMS SECTION - Electrical Diagrams........................................................................................................................Section G Wiring [...]

  • Page 108

    ELECTRICAL DIAGRAMS G-2 LF-72/74 WIRING DIAGRAM - ENTIRE MACHINE - CODE 1 1075, 1 1076, 1 1077 (L12146) LF-72 L12146 A CAVITY NUM BERING SEQU ENCE ( COMPONENT SIDE OF P.C. BOARD) J3 2 1 J5,J8 J9,J60 4 3 6 1 GENERAL INFORMATION ELECTRICAL SYMBOLS PER E 1537 C OLOR CODE B - BLACK R- R E D U - BLUE COMMON ANALOG P.C. BOARD A D C B E 554 556 TRIGGER CO[...]

  • Page 109

    ELECTRICAL DIAGRAMS G-3 LF-72/74 WIRING DIAGRAM - ENTIRE MACHINE - CODE 1 1209, 1 1210, 1 121 1,1 1227 (L12146-1) LF-72 L12146-1 A CAVITY NUM BERING SEQU ENCE (COMPONENT SIDE OF P.C. BOARD) J 3 2 1 J 5,J8 J9,J60 4 3 6 1 GENERAL INFORMATION ELECTRICAL SYMBOLS PER E 1537 COLOR CODE B - BLACK R- R E D U - BLUE COMMON ANALOG P.C. BOARD A D C B E 554 55[...]

  • Page 110

    ELECTRICAL DIAGRAMS G-4 LF-72/74 WIRING DIAGRAM - ENTIRE MACHINE - CODE 1 1290, 1 1291, 1 1292,1 1293 (L12146-2) LF-72 L12146-2 A C AVITY NUM BERING SEQUENCE (COMPONENT SIDE OF P.C. BOARD) J3 2 1 J5,J8 J 9,J60 4 3 6 1 COMMON ANALOG P.C. BOARD A D C B E 554 5 56 TRIGGER CONNECTOR J13 559 515 558 COLD FEED S1 F EED PLATE GENERAL INFORMATION ELECTRICA[...]

  • Page 111

    ELECTRICAL DIAGRAMS G-5 LF-72/74 WIRING DIAGRAM - ENTIRE MACHINE - CODE 1 1 195, 1 1 196, 1 1 197, (L12484) LF-74 L12484 A C AVITY NUM BERING SEQUENCE (COMPONENT SIDE OF P.C. BOARD) J3 2 1 J5,J8 J 9,J60 4 3 6 1 COMMON ANALOG P.C. BOARD A D C B E 554 5 56 TRIGGER CONNECTOR J13 559 515 558 COLD FEED S1 F EED PLATE GENERAL INFORMATION ELECTRICAL SYMBO[...]

  • Page 112

    Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re t ur n to Ma st e r T OC Re tu r n to Ma st e r T OC Re tur n to Ma st e r T OC Re tur n to Ma st e r T OC ELECTRICAL DIAGRAMS G-6 LF-72/74 SCHEMA TIC - ENTIRE MACHINE - CODE 1 1075, 1 1076, 1 1077 (G4617) LF-72 A D C B E 554 5[...]

  • Page 113

    ELECTRICAL DIAGRAMS G-7 LF-72/74 SCHEMA TIC - ENTIRE MACHINE - CODE 1 1209, 1 1210, 1 121 1,1 1227 (G4617-1) LF-72 A D C B E 554 556 TRIG GER C ONNECTOR J4 559 515 558 COLD F EED S1 FEED PLAT E T RIGGER I NPUT 67 556 J1-4 J1-5 J1-11 J1-12 J1-15 559 1 4 3 2 6 5 P 5 8 7 M OT OR / G EARBOX W B L5 515 558 589 587 554 551 550 551 550 576 577 575C 553 55[...]

  • Page 114

    ELECTRICAL DIAGRAMS G-8 LF-72/74 SCHEMA TIC - ENTIRE MACHINE - CODE 1 1290, 1 1291, 1 1292,1 1293 (G4617-2) LF-72 A D C B E 554 556 TRIG GER CONNECTOR J 13 559 515 558 C OLD FEED S1 FEED PLAT E TRIG GER INP UT 67 556 J1-4 J1-5 J1-11 J1-12 J1-15 559 1 4 3 2 6 5 P10 8 7 MOT OR / GEARBOX W B L5 515 558 589 587 554 A 550 551 550 576 577 575C 553 552 2 [...]

  • Page 115

    ELECTRICAL DIAGRAMS G-9 LF-72/74 SCHEMA TIC - ENTIRE MACHINE - CODE 1 1 195, 1 1 196, 1 1 197, (G4942) LF-74 A D C B E 554 556 T RIG GER C ONNECTOR J13 559 515 558 COLD F EED S1 FEED PLAT E T RIGGER I NPUT 67 556 J1-4 J1-5 J1-11 J1-12 J1-15 559 1 4 3 2 6 5 P 10 8 7 M OT OR / GEARBOX W B L5 515 558 589 587 554 A 550 551 550 576 577 575C 553 552 2 4 [...]

  • Page 116

    ELECTRICAL DIAGRAMS G-10 LF-72/74 SCHEMA TIC - COMMON ANALOG CONTROL PC BOARD - (G4559 SHEET 1) G-10 NOTE: This diagram is for reference only . It may not be accurate for all machines covered by this manual. Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re t ur n to Ma st e r[...]

  • Page 117

    ELECTRICAL DIAGRAMS G-11 LF-72/74 SCHEMA TIC - COMMON ANALOG CONTROL PC BOARD - (G4559 SHEET 2) G-11 NOTE: This diagram is for reference only . It may not be accurate for all machines covered by this manual. Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re t ur n to Ma st e r[...]

  • Page 118

    ELECTRICAL DIAGRAMS G-12 LF-72/74 SCHEMA TIC - COMMON ANALOG CONTROL PC BOARD - (G4559 SHEET 3) G-12 NOTE: This diagram is for reference only . It may not be accurate for all machines covered by this manual. Re t ur n to Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re tur n t o Se ct io n T O C Re t ur n to Ma st e r[...]

  • Page 119

    NOTE: Lincoln Electric assumes no responsibility for liablilities resulting from board level troubleshooting. PC Board repairs will invalidate your factory warranty . Individual Printed Circuit Board Components are not available from Lincoln Electric. This information is pro- vided for reference only . Lincoln Electric discourages board level troub[...]