Miller GA-40C Owner’s Manual
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Miller GA-40C is a welding gun designed for Gas Metal-Arc Welding, featuring a curved head tube, air cooling, and a 400 Ampere rating with CO2. It connects to the wire drive assembly with a guide positioned close to the drive rolls for maximum wire column strength, eliminating waves. The gun switch can be repositioned on top of the gun handle. Its duty cycle is 60% using CO2 shielding gas, meaning it can operate 6 minutes out of every 10. Exceeding the rated amperage with CO2 or failing to reduce amperage/duty cycle when using mixed shielding gas can damage the gun.
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July 1985 IMPORTANT Read and understand the FORM: OM-1535 entire Effective With contents of both this manual and the power source manual used with this unit, with special emphasis the safety material throughout both manuals, before installing, operating, or maintaining this equipment. This unit and these instructions are for use only by persons trained and experienced in the Style No. JA-21 on safe operation of welding equipment. MODEL GA-40C Do not allow untrained persons to install, operate, or maintain this unit. Contact your distributor if you do not fully understand these instructions. F11LE COPY RETURN TO FOLDER OWNERS MANUAL MILLER ELECTRIC MFG. Co. 718 S. BOUNDS ST, P.O. Box 1079 APPLETON, WI 54912 USA ADDITIONAL COPY PRICE 35 CENTS NWSA CODE NO. 4579 PRINTED IN U.S.A. LIMITED WARRANTY EFFECTIVE: FEBRUARY 25. 1985 This warranty supersedes all previous MILLER warranties and is ex clusive with no other guarantees or warranties expressed or implied. LIMITED WARRANTY tions hereof, 4 warrants to - Miller Electric Subject to the terms Mfg. Co., Appleton, its Distributor/Dealer that all new and condiWisconsin and unused Equipment furnished by Miller is free from defect in workmanship and material as of the time and place of delivery by Miller. No warranty is made by Miller with respect to engines, trade accessories or other items manufactured by others. Such engines, trade accessories and other items are sold subject to the warranties of their respective manufacturers, if any All engines are warranted by their manufacturer for one year from date of original purchase, except Tecumseh engines which . have a two year warranty. as specified below, Millers warranty does not apply components having normal useful life of less than one Ii) year, such as spot welder tips, relay and contactor points, MILLERMATIC parts that come in contact with the welding Except In the case of Millers breach of warranty or any other duty with respect to the quality of any goods, the exclusive remedies therefore shall be, at Millers option (1) repair or (2) replacement the reasonable cost of or, where authorized in writing by Miller in appropriate cases, (3) repair or replacement at an authorized Miller service station (4) payment of or or credit for the purchase price (less reasonable depreciation based upon actual use) upon risk and expense. MILLERs return of the goods at Customers ? option of repair or replacement will be F.O.B., Factory, at Appleton, Wisconsin, or F.O.B., at a MILLER authorized service facility, therefore, no compensation for transportation costs of any kind will be allowed. Upon receipt of notice of apparent defect or failure, Miller shall instruct the claimant on the warranty claim procedures to be followed. to ,j) r~ wire not including nozzles result from defect in workmanship Miller shall be within the ment or material. honor warranty claims in the event of failure resulting from required to Equipment following periods to the original user: ranted ~ and nozzle insulators where failure does from the date of delivery on war- ANY EXPRESS WARRANTY NOT PROVIDED HEREIN AND ANY IMPLIED WARRANTY, GUARANTY OR REPRESENTATION AS TO PERFORMANCE, AND ANY REMEDY FOR BREACH OF CONTRACT WHICH, BUT FOR THIS PROVISION, ARISE BY IMPLICATION, OPERATION OF LAW, MIGHT a defect CUSTOM OF TRADE OR COURSE OF DEALING, INCLUDING ~, of Equip- ANY IMPLIED WARRANTY OF MERCHANTABILITY OR OF ~ FITNESS FOR PARTICULAR PURPOSE, WiTH RESPECT TO ANY AND ALL EQUIPMENT FURNISHED BY MILLER IS EX 1: ~rn:I1dr:~n=errsr:~:r:nd ~ .~. ~ welding guns, feeder/guns and plasma torches... 90 days 4. All other Millermatic Feeders 1 year 5. Replacement or repair parts, exclusive of labor.. 60 days 3. A~ 6. Batteries 6 months provided that Miller is notified in writing within k~ thirty (30) days of the date of such failure. ~ CLUDED AND DISCLAIMED BY MILLER. EXCEPT AS EXPRESSLY PROVIDED BY MILLER IN ARE PRODUCTS INTENDED FOR ULTIMATE PURCHASE BY COMMERCIAL/INDUSTRIAL USERS AND FOR OPERATION BY PERSONS TRAINED AND EXPERIENCED IN THE USE AND MAINTENANCE OF WELDING EQUIPMENT AND NOT FOR CONSUMERS OR CONSUMER USE. MILLERS WARRANTIES DO NOT EXTEND EXTEND MILLERS WARRANTIES ANY CONSUMER. WRITING, MILLER SECTION 1 INTRODUCTION - Cable Ampere Rating 60% Duty Cycle Wire dcrp Diameter And . Cooling Length Method Net Ship Air 8-1/4 lbs. (3.8 kg) 9-3/4 lbs. Air 11-3/4 lbs. (5.3~ kg) 13-1/4 lbs. (6 kg) 10 ft. ~ 400 Amperes With C02 .035 thru 5/64 in. (0.9 thru 2.0 mm) (3 m) 15 ft. Hard (4.6 m) Figure 1 1 - 1. (4.4 kg) Specifications CAUTION 1. GENERAL INFORMATION AND SAFETY - Weight Hose statements include installation, operating, practices which if not carefully followed could result in minor personal injury or damage to this equipment. ___________ and maintenance A. General Information presented in this manual, and on various labels, tags, and plates on the unit pertains to equip design, installation, operation, maintenance, and troubleshooting which should be read, understood, and followed for the safe and effective use of this equip ment ment. B. installation, operation, maintenance, and troubleshooting of arc welding equipment require prac tices and procedures which ensure personal safety and the safety of others. Therefore, this equipment is to be installed, operated, and maintained only by qualified persons in accordance with this manual and all ap plicable codes such as, but not limited to, those listed at the end of Section 1 Safety Rules For Operation Of - Arc or A third signal word, IMPORTANT highlights instruc ______________, tions which need special emphasis to obtain the most efficient operation of this equipment. 1 2. RECEIVING-HANDLING Prior to installing this equipment, clean all packing material from around the unit and carefully inspect for any damage that may have occurred during shipment. Any claims for loss or damage that may have occurred in transit must be filed by the purchaser wIth the carrier. A copy of the bill of lading will be furnished by the manufacturer on re quest if occasion to file claim arises. - Safety The procedures Welding Power Source Owners in the welding power When requesting information concerning this equip ment, it is essential that Model Description and Serial (or Style) Numbers of the equipment be supplied. source Manual. 1 3. DESCRIPTION This gun is specifically for use with the Gas Metal-Arc Welding process. The alpha numeric designation refers to the following: - Safety instructions specifically pertaining to this unit ap pear throughout this manual highlighted by the signal words WARNING and CAUTION which identify ___________ different levels of hazard. G A statements include installation, operating, C - Gun - Air Cooled - 40 WARNING - - - Ampere Rating: 400 Amperes Curved Head Tube and maintenance procedures or practices which if not carefully followed could result in serious personal injury or loss of life. SECTION 2 WARNING ELECTRIC SHOCK can - kill. IMPORTANT the gun Do not touch five electrical parts. Disconnect INSTALLATION input power and employ procedures before instalfing 1. lockout/tagging Lockout/tagging procedures consist of padlocking line disconnect switch in open position, removing fuses from fuse box, or shutting off and red-tagging circuit breaker or other disconnecting device. - 1. GUN/FEEDER TION (Figure 4-1) CONNECTOR guide is provided as part of gun/feeder connector securing knob the wire drive assembly. IMPORTANT The outlet guide should be positioned possible to the drive rolls without touching them. This gives the wire maximum column strength _____________ as close thus 2 Loosen the on gun. The outlet assembly. as ellminating waves. INSTALLA 2. Insert the gun/feeder connector into the wire drive assembly. OM-1 535 Page 1 3. the Tighten gun/feeder securing connector 4. Separate 5. Rotate head tube 1800. Ensure that machined are lined up with hole for setscrew and gun cavities. two knob. 2 2. GUN SWITCH CONNECTION (Figure 4-1) Align the key on the gun switch connector with the keyway on the Switch Control receptacle; insert the connector and rotate the threaded collar clockwise. - halves of gun handle. depressions in head tube - ii~i~iit~i~ Ensure that the switch leads do not become twisted when the head tube is rotated. 2 -3. REPOSITIONING 4-1) GUN SWITCH (Figure The gun is shipped with the gun switch position Figure 4-1. The gun switch can be repositioned on top of the gun handle by following the procedure outlined in Steps 1-9. ed - as 1. Loosen head tube setscrew in gun handle. 2. Remove liner setscrew. 3. Remove halves pin and locking ring holding handle together. SECTION 3 3 - 1. DUTY CYCLE - The duty cycle of - Replace liner 7. Join handle halves a welding 60% duty cycle using C02 shielding gas. This means that the gun can be operated six minutes out of every ten with the CO2 gas shielding. The remaining four minutes the gun should be idle to permit proper cooling. ~ EXCEEDING THE RATED AMPERAGE WITH CO2 OR FAILING TO REDUCE THE WELDING AMPERAGE OR DUTY CYCLE WHEN USING A MIXED SHIELDING GAS can result in damage to the gun. Do not exceed rated amperage when using CO2. Operate at 30% duty cycle when using mixed shielding Ensure that proper electrical connections have been made to the welding power source and the wire feeder. 2. Ensure that the proper shielding gas is connected to the shielding gas valve. 3. Ensure that the welding wire has been properly threaded and that correct initial tensions have been set on the drive rolls (refer to the ap propriate Owners Turn on the Manual). shielding gas supply. Place the wire feed control(s) in the required position for the welding setup. 6. Place the controls on the welding power source, required position for the welding setup (refer to welding power source Owners in the Manual). 7. of handle. Energize the welding power source and the wire feeder (refer to the respective Owners Manuals). OM-1 535 Page 2 together and rotate locking ring. 8. pin through handle halves and switch lever. Ensure that switch spring is properly posi tioned in handle. 9. Tighten head tube Insert setscrew. kill. ELECTRIC SHOCK can WELDING WIRE can cause puncture wounds. Do not touch five electrical parts. Do not point gun toward any part of the body, or other personnel, or any conducting surface when threading welding wire. The welding wire and all metal parts in contact with it are energized when gun trigger is depressed. When installing new equipment, or prolonged shutdown, allow shielding gas to flow continuously for at least one minute prior to welding to purge the shielding gas line. To avoid wasting wire while purging, loosen pressure adjustment knob on drive assembly, and pivot free from cover. IMPORTANT ______________ after 8. Press 9. Close drive roll cover and adjust tension (see ap propriate Owners Manual). 10. Actuate the gun switch to run the wire out beyond the end of the gas nozzle. Cut the wire Purge button on the wire feeder (if ap plicable) or the gun switch to purge the gas line. off 5. opposite side gases. 3 -2. GAS METAL-ARC WELDING 4. setscrew in SEQUENCE OF OPERATION gun is the percentage of a ten minute period that a gun can be operated at a given load. This gun is rated at 1. 6. illustrated in so (6.4 11. it sticks out approximately 1/4 to 3/8 in. 9.5 mm) from the nozzle. to Set the Wire Speed control slightly in anticipated wire speed. excess of RAYS, SPARKS, AND HOT burn eyes and skin; NOISE can WARNING ARC _________ SURFACES can damage hearing. Wear correct eye, ear, and body protection. AND GASES can seriously harm your FUMES health. enough ventilation to keep fumes and gases breathing zone. See Section 1 Safety Rules For Operation Of Arc Welding Power Source in welding power source Owners Manual for basic welding safety information. Use from the - ELECTRIC SHOCK can kill. Do not touch live electrical parts. Do not touch welding wire or welding. 14. After the controls on the welding power source and the wire feeder (if applicable) have been ad justed for normal operation, welding power (and wire feeder) will function source any metal part in contact with it while Welding wire automatically whenever the gun switch is depressed. Releasing the switch will extinguish and all metal parts in contact with it carry weld current when the gun switch is depressed. the 12. Hold the end of the gas nozzle approximately 1/2 in. (12.7 mm) from the workpiece. 13. 3 adjustment 1/4 turn at a stops. Do not overtighten. pressure page time until and cause wire feed and gas flow to stop. 3. SHUTFING DOWN - Press the gun switch. Gas will start to flow, wire will start to feed, and the arc will be established. If wire slippage is noticed, tighten drive roll arc 1. Stop welding. 2. Turn off 3. Turn off the welding power source and wire feeder. slip shielding gas at the source. L~~U~E CONCENTRATION HIGH SHIELDING GAS can harm health or kill. Shut off gas S SECTION 4 WARNING: ELECTRIC SHOCK can or HOT SURFACES 2. Al/ow Cut off any portion of the electrode wire which extends beyond end of contact tube. internally Remove contact tube and replace with tube. 3. servicing. can cause severe burns. cooling period before servicing. 1. INSPECTION - new con- tact Replace nozzle and 4. 4 not in use. MAINTENANCE kill. Do not touch five electrical parts. Disconnect gun from wire feeder before inspecting - supply when OF AND UPKEEP - shop conditions will determine frequency maintenance required. and and type of resume operation. Usage 4 3. CHANGING WIRE SIZES - WARNING ELECTRIC SHOCK (Figure 4-1) can kill. _________ Inspect gun for broken areas, cracks and loose parts; tighten, repair and replace as required. 1. Carefully 2. remove any weld spatter or foreign matter which may accumulate around the nozzle orifice. 3. Remove any accumulation around the switch. 4. Repair or replace as required all hose and cabl ing; give particular attention to frayed and crack ed insulation and areas where it enters equip ment. Remove grease and grime from components; moisture from electrical parts and cables. 5. CAUTION: TICLES can FLYING DIRT AND METAL Do not touch live electrical parts. Shut down welding power source and disconnect from line power employing lockout/tagging pro cedures before internally inspecting or servicing. Lockout/tagging procedures consist of padlocking line disconnect switch in open position, removing fuses from fuse box, or shutting off and red-tagging circuit breaker or other disconnecting device. When changing the gun from .035 or .045 in. (0.9 or 1.1 mm) wire to 1/16 or 5/64 in. (1.6 or 2.0 mm) wire vice versa, it is necessary to change the contact tube, adapter, liner, and wire guides. (For inlel wire guide installation, refer to the appropriate welding power source or wire feeder Owners Manual.) or contact tube 1. Remove nozzle. 2. Cut off any portion of the electrode wire which extends beyond end of contact tube. 3. Remove contact tube. 4. Retract wire onto wire spool (see wire feeder Owners Manual). 5. Disconnect gun 6. Remove outlet wire 7. Loosen liner setscrew. PAR injure personnel and damage equip- ment. Point gun liner only in a safe direction away from personnel and equipment when cleaning with S compressed air. 6. 4 - Blow out gun casing or liner with compressed air whenever the wire or liner is removed. 2. CONTACT TUBE REPLACEMENT (Figure 4-1) 1. assembly from wire feeder. guide. Remove nozzle. OM-1535 Page 3 8. Remove contact tube adapter (if applicable). 14. Insert new liner into of gun assembly (if 9. Lay cable assembly out flat and straight (no coils in the cable/conduit). Pull out liner from 10. gun/feeder assembly (if applicable). gun CAUTION FLYING connector end gun/feeder applicable). DIRT connector end of AND METAL outlet wire guide. 15. Install 16. Cut liner off so it sticks out 1/4 in. (6.4 mm) from the end of the head tube (if applicable). 17. Install new contact tube 18. Install new contact tube. new PAR adapter. ________ TICLES can injure personnel and damage equip ment. Point gun liner only in a safe direction away from personnel and equipment when cleaning with compressed air. 11. Blow out gun casing whenever the wire 12. 13. liner with compressed air liner is removed. or or Loosen collar setscrew and 0-ring from Slide the new ing so remove 0-ring onto the end of against 19. Tighten liner setscrew in gun handle liner in place (if applicable). 20. Replace nozzle. 21. Make gun connections 2-1 and 2-2. 22. Thread to lock the collar and existing liner (if applicable). liner. Position collar trudes CAUTION OVERTIGHTENING LINER SETSCREW will damage liner. Do not overtighten liner setscrew. _________ sleeving on the the liner sleev new as instructed in Sections size electrode wire. that 1-1/8 in. (28.6 mm) of the liner pro beyond collar, and secure collar with setscrew (if applicable). Nozzle Contact Tube Head Tube. Contact Tube Adaptor Leaf Switch Switch Spring Handle. Bottom Half Monocoil Liner Outlet Wire Guide Handle. Top Half Collar 0-Ring Gun/Feeder Connector Strain Relief TC-044 406-A Figure 4 OM-1535 Page4 - 1. Gun Components L~~U~L ELECTRIC SHOCK can kill; WELDING WIRE can cause puncture wounds; ENERGIZED WELDING WIRE may cause arcing when touching conductive objects. 13. Do not touch live electrical parts. point gun toward any part of the body, other personnei. or any conductive surface when 14. With switch spring properly positioned in through handle (see Figure 4-1), insert pin handle halves and gun switch. Tighten the head tube guii gun setscrew. Do not threading welding wire. Use cold wire JOG button, if available, to thread wire. The welding wire and all metal parts in contact energized when the gun switch is pressed. are CAUTION: OVERTIGHTENING LINER SETSCREW will damage liner. Do not overtighten finer setscrew. with it Replace liner 15. 4 Resume operation. contact tube 4. CHANGING THE HEAD TUBE - tighten. Replace nozzle locking nut, insulator, adapter, and nozzle. 16. 23. setscrew and (Figure 4-1) 4 - 5. INSTALLING REPLACEMENT LINER (Figure 4-2) 1. Disconnect gun 2. Remove the nozzle, contact tube adapter, in sulator, and nozzle retaining nut from head tube. 3. Remove liner setscrew. 4. Loosen head tube setscrew. 5. Remove pin and locking handle halves together. 6. Separate the gun handle halves. 7. Remove head tube from cable connector. 8. Remove 9. Install acrylic glass tubing assembly from wire feeder. WARNING ELECTRIC SHOCK can kill. _________ ring holding the gun acrylic glass tubing from head tube. on new head tube. Do not touch five electrical parts. Disconnect input power to we/ding power source and employ lockout/tagging procedures before internally inspecting or servicing. Lockout/tagging procedures consist of padlocking line disconnect switch in open position, removing fuses from fuse box, or shutting off and red-tagging circuit breaker or other disconnecting device. 1. Remove nozzle. 2. Cut off any portion of the electrode wire which extends beyond end of contact tube. 3. Remove contact tube. Retract wire onto wire 4. Owners 10. Install new head tube IMPORTANT If ______________ on cable connector. replacing an 800 head tube with a straight head tube, cut the existing 5. Disconnect gun assembly from wire feeder. 6. Remove outlet wire liner off so it sticks out 1/4 in. (6.4 mm) from the end of the head tube. 7. Loosen liner setscrew. If 8. Remove contact tube 600 head tube replacing head tube, gun/feeder a or a 600 straight head tube with an 800 the outlet wire guide from the or a remove connector and remove and install the finer as the finer. Prepare instructed in Section 4-3, Steps 11-14. Reinstall the outlet wire guide. Cut the liner off so it sticks out 1/4 in. (6.4 mm) from the end of the head tube. 11. spool (see wire feeder Manual). Position cable/conduit and head tube in bottom half of gun handle with acrylic glass tube on top of the leaf switch and the cable strain relief fitted into the appropriate groove. IMPORTANT Ensure that the leaf switch is properly positioned in bottom haff of gun handle as illustrated in Figure 4-1, and the machined depression in the head Lay cable assembly 9. guide. adapter. out flat and straight (no coils in the cable/conduit). 10. Pulloutthelinerfrom of gun CAUTION TICLES can gun/feeder connector end assembly. FLYING DIRT AND METAL PAR- injure personnel and damage equip ment. Point gun liner only in a safe direction away from personnel and equipment when cleaning with compressed air. ______________ 11. 12. Join the gun handle halves the locking ring. together and rotate Blow Out gun casing whenever the wire tube is lined up with hole for the head tube setscrew. 12. or or liner with compressed air liner is removed. Loosen collar setscrew and remove collar anid from the existing liner if applicable. 0-ring OM-1535 Fage5 13. Slide the 0-ring onto the end of sleeving on the liner. Position collar against the liner sleev ing so that 1-1/8 in. (28.6 mm) of the liner pro trudes beyond collar, and secure collar with new 14. Do not setscrew if applicable. 16. Insert liner into the gun/feeder connector 17. new end of the gun 15. CAUTION OVERTIGHTENING LINER SETSCREW will damage liner. ________ Tighten setscrew. liner setscrew. Cut liner off so it sticks out 1/4 in. (6.3 mm) from the end of the head tube. assembly. Install appropriate outlet wire overtighten finer 18. guide. Reinstall appropriate contact tube adapter, tube, and nozzle. con tact 19. Thread welding wire and resume operation. Nozzle 6~Contact Tube Tube Adapter Liner Setscrew Outlet Collar ~ 0-Ring ~ ~ Wire Guide Gun/Feeder Connector TC083 963 Figure OM-1535 Page6 4 - 2. Liner Replacement November 1984 FORM: OM-1535 Effective With Style No. JA-21 PARTS LIST 1 2 37 5 36 9 10 11 21 20 11 18 19 Includes Items thru 30 ~~ fl-i 27 TC-049 927-B Figure OM-l53SPagol A - Exploded View Of GA-40C Gun Item Part No. No. Figure A Description Quantity Exploded View Of GA-40C Gun 1 047 957 2 054 183 2 2 054 157 047 566 2 047 565 3 094 985 3 094 987 4 094986 047603 081 957 SWITCH, leaf 601 869 NUT, hex -jam 5/16-18 089 400 HANDLE, gun 1 049 737 1 5 6 7 8 9 10 NOZZLE, screw type 5/8 orifice x 2-3/4 TUBE, contact .035 wire TUBE, contact .045 wire TUBE, contact 1/16 wire TUBE, contact 5/64 wire ADAPTER, tube contact .035-.045 wire ADAPTER, tube contact 1/16-5/64 wire INSULATOR, nozzle NOZZLE, retaining nut - - SCREW, set - socket hd 5 /16-18 059294 13 SPRING, 0.21 ODx5/8 long 049313 TRIGGER, gun 047867 TUBING, glass acrylic No. 9 x 1/2 049872 CORD, power (consisting of) 14 079878 15 23 24 079535 TERMINAL, male 048834 CLAMP, cable 604525 CORD, No. 182/c (orderbyft) 081 909 SPLICE, parallel 20-16 wire 091 602 STRAIN RELIEF 047 574 CONNECTOR, cable feeder end 079 974 0-RING, 1/2 lDxO.103 047 555 GUIDE, wire outlet .045 wire 047 556 GUIDE, wire outlet 1/16-5/64 wire 049312 RING, locking 081 959 SCREW, set hollow lock 6-32 x 3/32 25 049 876 26 27 047 564 11 12 16 17 18 19 20 21 22 22 28 29 30 HOUSING PLUG & PINS (consisting of) - - - t083 891 079 975 049 307 27 081 959 t083 897 28 29 079 975 047 557 30 081 959 31 049 298 32 32 33 34 35 36 047 572 047 573 37 046115 059 293 602173 047 575 049 854 NUT, connecting cable FITTING, hose gas LINER, monocoil .045 wire (consisting of) - - .O-RING,3/l6IDxO.103 COLLAR, locking SCREW, set hollow lock 6-32 x 3/32 LINER, monocoil .0-RING,3/l6IDxO.103 COLLAR, locking SCREW, set hollow lock 6/32 x 3/32 STRAIN RELIEF, extension CABLE/CONDUIT, 10 ftor CABLE/CONDUIT, l5ft RIVET, solid flared hd 7/32 dia x 1-1/4 long SCREW, set socket hd 10-32 x 1/4 CONNECTOR, cable gun end TUBING, glass acrylic 1/2 x 1-1/4 TUBE, head6O - - - - 2 2 2 2 1 1 1 1 1 1 1 1 1 1 1 4 1 2ft 2 1 1 2 1 1 3 2 2 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Optional Equipment 047 959 045 638 NOZZLE, NOZZLE, 046 776 046 775 NOZZLE, spot NOZZLE, spot screw screw - - type 1/2 orifice x 2-3/4 type 13/16 orifice x 2-3/4 flat 1-1/16 ID x 3-19/32 inside corner 1-1/16 ID x 3-19/32 OM-1 535 Page 2 Item Part No. No. Figure Description Exploded View Of GA-40C Gun (Contd.) A 046 774 NOZZLE, spot outside corner 1-1 / 16 ID 071 019 TUBE, head 45 degree 072 819 TUBE, head 45 degree 044 005 NOZZLE, spot fIat 1-1/2 ID x 3.593 054 202 TUBE, contact .030-.035 wire 1-5/16 - x 3-19/32 - 054 201 TUBE, contact .045 wire 1-5/16 047 576 TUBE, contact 1/16 wire x 1-7/16 047 577 TUBE, contact 5/64 wire 1-7/16 044 006 TUBE, contact .052 wire 1-5/16 057 730 TUBE, contact .052 wire 1-7/16 046 001 TUBE, head 80 046 002 TUBE, head straight 180 045 887 HEAT SHIELD/HANGING BRACKET tFor all gun lengths. BE SURE TO PROVIDE MODEL AND STYLE NUMBERS WHEN ORDERING REPLACEMENT PARTS. OM-1535 Page 3 Quantity
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Frequently Answers and Questions
What is the purpose of the GA-40C welding gun?
The GA-40C welding gun is specifically designed for use in the Gas Metal-Arc Welding process.
What does the alpha-numeric designation 'GA-40C' stand for?
GA refers to 'Gun - Air Cooled', while 40C indicates a 400 Ampere rating with a Curved Head Tube.
What safety precautions should be taken when using the GA-40C welding gun?
Always disconnect input power and employ lockout/tagging procedures before installing or servicing the gun. Avoid touching live electrical parts to prevent electric shock.
How do I connect the gun/feeder connector to the wire drive assembly?
Loosen the securing knob on the gun, insert the gun/feeder connector into the wire drive assembly, and tighten the securing knob.
How do I reposition the gun switch?
Loosen the head tube setscrew, remove the liner setscrew, separate the gun handle halves, reposition the gun switch, and reassemble the gun.
What is the duty cycle of the GA-40C welding gun?
The GA-40C has a 60% duty cycle using C02 shielding gas, meaning it can operate for six minutes out of every ten with proper cooling intervals.