Instruction/ maintenance manual of the product 750 Hobart
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AirForce 750 Processes Description Air Plasma Cutting and Gouging Air Plasma Cutter OM-279 180 060P August 2001.
Hobart W elders manufactures a full line of welders and welding related equipment. For information on other quality Hobart products, contact your local Hobart distributor to receive the latest full line catalog or individual catalog sheets. T o locate your nearest distributor or service agency call 1-877-Hobart1.
T ABLE OF CONTENTS SECTION 1 – SAFETY PRECAUTIONS - READ BEFORE USING 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1. Symbol Usage 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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OM-279 Page 1 SECTION 1 – SAFETY PRECAUTIONS - READ BEFORE USING pom _nd_9/98 1-1. Symbol Usage Means W arning! W atch Out! There are possible hazards with this procedure! The possible hazards are shown in the adjoining symbols. Y Marks a special safety message.
OM-279 Page 2 D On inverter power sources, failed parts can ex- plode or cause other parts to explode when power is applied. Always wear a face shield and long sleeves when servicing inverters. EXPLODING P ARTS can injure. Sparks and hot metal blow out from the cutting arc.
OM-279 Page 3 1-3. Additional Symbols For Installation, Operation, And Maintenance HOT P ARTS can cause severe burns. D Do not touch hot parts bare handed. D Allow cooling period before working on torch. MOVING P ARTS can cause injury . D Keep away from moving parts such as fans.
OM-279 Page 4 1-4. Principal Safety Standards Safety in Welding and Cutting , ANSI Standard Z49.1, from American W elding Society , 550 N.W . LeJeune Rd, Miami FL 33126 Safety and Health Standards , OSHA 29 CFR 1910, from Superinten- dent o f Documents, U.
OM-279 Page 5 SECTION 1 – CONSIGNES DE S É CURIT É – LIRE A V ANT UTILISA TION pom_nd_fre_9/98 1-1. Signification des symboles Signifie Mise en garde ! Soyez vigilant ! Cette proc é dure pr é sente des risques de danger ! Ceux-ci sont identifi é s par des symboles adjacents aux directives.
OM-279 Page 6 D Isoler la pince de masse quand pas mis à la pi è ce pour é viter le contact avec tout objet m é tallique. Il y a DU COURANT CONTINU IMPORT ANT dans les convertisseurs apr è s la suppression de l ’ ali- mentation é lectrique.
OM-279 Page 7 Les bouteilles de gaz contiennent du gaz sous haute pression. Si une bouteille est endommag é e, elle peut exploser . Puisque les bouteilles de gaz font habituellement partie d ’ un processus de travail des m é taux, assurez – vous de les manipuler correctement.
OM-279 Page 8 1-4. Principales normes de s é curit é Safety in W elding and Cutting, norme ANSI Z49.1, de l ’ American W el - ding Society , 550 N.W . Lejeune Rd, Miami FL 33126 Safety and Health Sandards, OSHA 29 CFR 1910, du Superintendent of Documents, U.
OM-279 Page 9 SECTION 2 – INST ALLA TION 2-1. Specifications Model Amperes Input at Rated Load Output 60 Hz T ype of Plasma Rated Rated Cutting Maximum Open- Circuit Model 200 V 230 V 460 V 575 V KV A KW Output Gas Output Cutting Capacity Circuit V oltage DC Single- Phase 42.
OM-279 Page 10 2-4. Cutting Speed The cutting speed curve shows the recommended maximum cutting speed capabilities of the power source and torch for mild steel of various thickness. Y Exceeding recommended cutting speeds will cause rapid erosion of the tip and electrode.
OM-279 Page 1 1 2-6. Connecting Gas/Air Supply 1 Unit Gas Fitting (Female 1/4 NPT) 2 Quick Connect Gas Fitting 3 Standard Gas Fitting Obtain and install desired fitting. 4 Hose Obtain suitable hose according to installed fitting, and connect to fit- ting.
OM-279 Page 12 2-8. Placing Jumper Links Check input voltage available at site. 1 Jumper Link Label Move jumper links to match input voltage and label on unit. Ref. 801 455 S-094 120-B 230 V olts 460 V olts 575 V olts L1 L2 L3 L1 L2 L3 L1 L2 L3 3/8 in T ools Nee d e d : 230 VOL TS 460 VOL TS 200 VOL TS S-083 566-C LL LL LL 1 Do not overtighten.
OM-279 Page 13 L1 (U) 2-9. Connecting Input Power 1 Strain Relief Clamp Route input and grounding conduc- tors through clamp to terminal board. 2 Input And Grounding Conductors 3 Line Disconnect Device Select type and size of overcurrent protection using Section 2-7.
OM-279 Page 14 SECTION 3 – OPERA TION 3-1. Front Panel Controls 1 Pilot Arc Switch Use switch to control pilot arc. Place switch in Expanded Metal position for continuous pilot arc. Use while cutting ex- panded metals only . . The Expanded Metal position keeps the pilot arc in the circuit at all times.
OM-279 Page 15 3-2. Setting Gas/Air Pressure Place controls in positions shown to adjust air pressure. Only gas/air cir- cuit is activated when the Power switch is turned On with Output Control in Gas/Air Set position. 1 Pressure Gauge 2 Pressure Adjustment Knob Lift knob and turn to adjust pres- sure.
OM-279 Page 16 3-3. Sequence Of Operation Put On Personal Safety Equipment After cutting arc starts, slowly start moving torch across metal. Adjust torch speed so sparks go thru metal and out bottom of cut. Pause briefly at end of cut before releasing trigger .
OM-279 Page 17 SECTION 4 – MAINTENANCE & TROUBLESHOOTING 4-1. Routine Maintenance Y Disconnect power before maintaining. . Maintain more often during severe conditions.
OM-279 Page 18 4-2. T rouble Lights 1 Pressure Light Lights if gas/air pressure is below 40 PSI (276 kPa). Tur n power Of f, and check for prop- er gas/air pressure (see Section 3-2). 2 Cup Light Lights if shield cup is loose. T urn power Of f, and check shield cup connection (see torch Owner ’ s Manual).
OM-279 Page 19 4-4. T roubleshooting T rouble Remedy No pilot arc; dif ficulty in establishing an arc. Clean or replace worn consumables as necessary (see torch Owner ’ s Manual). Check for damaged torch or torch cable (see torch Owner ’ s Manual).
OM-279 Page 20 T rouble Remedy Fan motor FM does not run; Power light and Ready light both On. Have Factory Authorized Service Agent check fan motor connections. Check input power , and check for proper input connections (see Sections 2-7 and 2-9). Trouble lights not working.
OM-279 Page 21 SECTION 5 – ELECTRICAL DIAGRAMS 193 215 Figure 5-1. Circuit Diagram For 200/230/460 V olt Models.
OM-279 Page 22 194 148 Figure 5-2. Circuit Diagram For 230/460/575 V olt Models.
OM-279 Page 23 Notes.
OM-279 Page 24 SECTION 6 – P ARTS LIST 801 499-J . Hardware is common and not available unless listed. 1 2 3 4 5 6 7 8 9 10 15 11 12 16 8 18 19 20 21 22 23 24 25 26 27 28 29 30 25 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 17 11 12 13 14 50 51 52 Figure 6-1.
OM-279 Page 25 Description Part No. Dia. Mkgs. Item No. Figure 6-1. Main Assembly Quantity 1 178 158 P ANEL, side LH 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
OM-279 Page 26 Description Part No. Dia. Mkgs. Item No. Figure 6-1. Main Assembly (Continued) Quantity 45 P ANEL, front (consisting of) 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Warranty Questions? Call 1-877-HOBART1 for your local Hobart distributor. hobart retail 4/00 Service Y o u always get the fast, reliable response you need. Most replacement parts can be in your hands in 24 hours. Support Need fast answers to the tough welding questions? Contact your distributor or call 1-800-332-3281.
PRINTED IN USA 2000 Hobart Welding Products. 1/00 Hoba rt We lding Pr oducts An I l li noi s T ool W orks Company 600 West M ain Street Troy , OH 45373 US A For Technical Assi stance: Call1-800-33.
An important point after buying a device Hobart 750 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Hobart 750 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Hobart 750 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Hobart 750 you will learn all the available features of the product, as well as information on its operation. The information that you get Hobart 750 will certainly help you make a decision on the purchase.
If you already are a holder of Hobart 750, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Hobart 750.
However, one of the most important roles played by the user manual is to help in solving problems with Hobart 750. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Hobart 750 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
