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OM-952 220 361A
June 2004
Processes
Flux Cored (FCAW) Welding
MIG (GMAW) Welding (Optional)
Description
Semi-Automatic, Air-Cooled
Flux Cored (FCAW) And MIG
(GMAW) Welding Gun
H-9A Gun
Visit our website at
www.HobartWelders.com
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From Hobart to You Thank you and congratulations on choosing Hobart. Now you can get the job done and get it done right. We know you don’t have time to do it any other way. This Owner’s Manual is designed to help you get the most out of your Hobart products. Please take time to read the Safety precautions. They will help you protect yourself against potential hazards on the worksite. We’ve made installation and operation quick and easy. With Hobart you can count on years of reliable service with
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TABLE OF CONTENTS SECTION 1 −SAFETY PRECAUTIONS FOR FCAW AND GMAW WELDING GUNS − READ BEFORE USING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1-1. Symbol Usage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1-2. FCAW And GMAW Gun Hazards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 E
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SECTION 1 −SAFETY PRECAUTIONS FOR FCAW AND GMAW WELDING GUNS − READ BEFORE USING SR7_8/03 1-1. Symbol Usage Marks a special safety message. Means Warning! Watch Out! There are possible hazards with this procedure! The possible hazards are shown in the adjoining symbols. Means NOTE; not safety related. This group of symbols means Warning! Watch Out! Possible ELECTRIC SHOCK and HOT PARTS hazards. Consult symbols and related instructions below for necessary actions to avoid the hazards. 1-2. FC
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EMF INFORMATION Considerations About Welding And The Effects Of Low Frequency Electric And NOTE Magnetic Fields The following is a quotation from the General Conclusions Section of To reduce magnetic fields in the workplace, use the following the U.S. Congress, Office of Technology Assessment, Biological procedures: Effects of Power Frequency Electric & Magnetic Fields − 1. Keep cables close together by twisting or taping them. Background Paper, OTA-BP-E-53 (Washington, DC: U.S. Government Print
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SECTION 2 − SAFETY INFORMATION Read all safety messages throughout this manual. Obey all safety messages to avoid injury. Learn the meaning of WARNING and CAUTION. 1 Safety Alert Symbol 1 2 2 2 Signal Word WARNING means possible death WARNING CAUTION 3 or serious injury can happen. ELECTRIC SHOCK can kill. MOVING PARTS can injure. CAUTION means possible minor • Do not touch live electrical parts. • Keep away from moving parts. injury or equipment damage can 4 •Disconnect input power before • Kee
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3-3. Installing Gun Into Welding Power Source Turn off welding power source. If existing gun requires removal, see Section 5-6. Open pressure assembly. Remove screws (3) from Insert gun cable through opening in front cover, and remove cover panel. Route weld cable, trigger leads, and from wire drive assembly. gas hose through opening in drive housing. Reinstall cable end into drive housing with retaining grooves Remove wrapper from Reinstall cover and inserted into the two retaining ribs. un
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3-4. Threading Welding Wire 1 Wire Spool 2 Welding Wire 3 Inlet Wire Guide 4 Pressure Adjustment Knob 5 Drive Roll 6 Gun Cable Lay gun cable out straight. 4 Tools Needed: 6 5 1 2 3 Hold wire tightly to keep it from unraveling. 6 in 4 in (150 mm) (102 mm) Open pressure assembly. Pull and hold wire; cut off end. Push wire thru guides into gun liner; continue to hold wire. Rotate pressure adjustment Tighten knob in a clockwise direction until drive roll is tight against the welding wire. Adjust
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SECTION 4 − OPERATION 4-1. Operating The Gun 1 Trigger Switch When pressed, energized wire feeds and shielding gas flows. 1 Ref. 803 495-A OM-952 Page 6
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SECTION 5 − MAINTENANCE & TROUBLESHOOTING 5-1. Replacing Gun Contact Tip Turn off welding power source. 1 Nozzle Remove nozzle. 2 Contact Tip 3 3 Tip Adapter 2 Cut off welding wire at contact tip. Tools Needed: Remove contact tip from tip adapter, 1 and install new contact tip. Reinstall nozzle. Ref. 803 496-B 5-2. Cleaning Gun Liner Turn off welding power source. 1 Nozzle 2 Contact Tip 3 Adapter Head 1 Tube 2 3 8 mm Remove nozzle. Cut off wire Open pressure assembly. Retract Hold wire tig
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5-3. Replacing Gun Liner Turn off welding power source. Tools Needed: Head 8 mm / 10 mm Tube 8 mm Remove nozzle. Cut off wire Open pressure assembly. Retract Hold wire tightly to keep it at contact tip, and remove wire from liner onto spool. from unraveling. Secure contact tip and tip adapter. end of wire at spool. 2 mm Remove screws (3) from Loosen liner setscrew Twist handle locking ring counterclockwise cover, and remove cover with allen wrench. 1/4 turn and slide it down cable. Separate
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5-3. Replacing Gun Liner (Continued) 13/16 in (21 mm) 8 mm When liner exits cable at gun handle, guide liner into head tube. Continue to push liner until it exits end of head tube. Insert retaining nut into adapter, and adjust liner stickout as shown. Tighten retaining nut. Reinstall cable end into drive housing with retaining grooves inserted into the two retaining ribs. Be sure to position gas hose up. Position liner in groove so that end is flush with back of groove, adjust if necessary 2 mm
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5-4. Replacing Liner O-Ring Turn off welding power source. Tools Needed: Head 8 mm / 10 mm Tube 8 mm Remove nozzle. Cut off wire Open pressure assembly. Retract Hold wire tightly to keep it at contact tip, and remove wire from liner onto spool. from unraveling. Secure contact tip and tip adapter. end of wire at spool. 2 mm Loosen liner setscrew Twist handle locking ring counterclockwise Remove screws (3) from with allen wrench. 1/4 turn and slide it down cable. Separate cover, and remove cov
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5-3. Replacing Liner O-Ring (Continued) 13/16 in (21 mm) 8 mm Push liner toward gun. If necessary, twist cable to ease installation. Guide liner into head tube. Continue to push liner until it exits end of Insert retaining nut into liner, and adjust liner stickout as head tube. shown. Tighten retaining nut. Reinstall cable end into drive housing with retaining grooves inserted into the two retaining ribs. Be sure to position gas hose up. Position liner in groove so that end is flush with back of
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5-5. Replacing Switch And/Or Head Tube Turn Off welding power source. Twist handle locking ring counterclockwise Slide trigger assembly forward 1/4 turn and slide it down cable. Separate and out of lower portion of handle. gun handle by lifting top rear portion up and Disconnect leads. Install new sliding forward over head tube. switch and connect leads (polarity is not important). Reassemble in reverse order. If replacing head tube, continue to end of figure. Reassemble gun by placing Remove
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5-6. Removing Gun From Welding Power Source Turn off welding power source. Head Tube 8 mm Remove nozzle. Cut off wire Open pressure assembly. Retract Hold wire tightly to keep it at contact tip, and remove wire from liner onto spool. from unraveling. Secure contact tip and tip adapter. end of wire at spool. Disconnect weld cable from weld terminal. Remove wrapper from Remove screws (3) from unit. cover, and remove cover from wire drive assembly. Disconnect trigger leads from RC3 and RC4 on P
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5-7. Routine Maintenance Turn Off welding power source before maintaining. Each Spool Of Wire Clean Blow Out Nozzle Gun And Check Casing Contact Tip 3 Months Replace Cracked Control Gas Parts Cord Hose Gun Cable 5-8. Troubleshooting Trouble Remedy Check contact tip. Check for kinks in gun cable. Wire does not feed; wire is not ener- g gized; ized; wire feeds unevenly wire feeds unevenly. Check contact tip. Check for kinks in gun cable. Blow out gun liner (see Section 5-2). Check for secure gu
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SECTION 6 − PARTS LIST 1 2 3 8 − See Table 6-1 4 7 5 4 9 6 4 803 840-A Figure 6-1. H-9A Gun Item Part No. No. Description Quantity 195 343 Figure 6-1. H-9A Gun . . . 1 . . . . . . . . . . . . . 169 715 . . NOZZLE, slip type .500 orf flush . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 . . . 2 . . . . . . . . . . . . . 169 716 . . ADAPTER, contact tip . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 . . . 3 . . . . . . . . . . . . . 21
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Notes Work like a Pro! Pros weld and cut safely. Read the safety rules at the beginning of this manual.
