Hobart 750 - Manuals

Hobart 750 – Manual in PDF format online.

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Manual

Manual Hobart 750

Summary

Page 2 - From Hobart to You

Hobart Welders manufactures a full lineof welders and welding related equipment.For information on other quality Hobartproducts, contact your local Hobart distributorto receive the latest full line catalog orindividual catalog sheets. To locate your nearestdistributor or service agency call 1-877-Ho...

Page 3 - TABLE OF CONTENTS; WARNING

TABLE OF CONTENTS SECTION 1 – SAFETY PRECAUTIONS - READ BEFORE USING 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1. Symbol Usage 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2. Plasma Arc Cutting Haz...

Page 5 - SECTION 1 – SAFETY PRECAUTIONS - READ BEFORE USING; Symbol Usage; Plasma Arc Cutting Hazards; CUTTING can cause fire or explosion.

OM-279 Page 1 SECTION 1 – SAFETY PRECAUTIONS - READ BEFORE USING pom _nd_9/98 1-1. Symbol Usage Means Warning! Watch Out! There are possible hazardswith this procedure! The possible hazards are shown inthe adjoining symbols. Y Marks a special safety message. . Means “Note”; not safety related. This ...

Page 7 - Additional Symbols For Installation, Operation, And Maintenance

OM-279 Page 3 1-3. Additional Symbols For Installation, Operation, And Maintenance HOT PARTS can cause severe burns. D Do not touch hot parts bare handed. D Allow cooling period before working on torch. MOVING PARTS can cause injury. D Keep away from moving parts such as fans. D Keep all doors, pane...

Page 9 - SECTION 1 – CONSIGNES DE SÉCURITÉ – LIRE AVANT UTILISATION; Signification des symboles; Dangers liés au coupage à l’arc au plasma

OM-279 Page 5 SECTION 1 – CONSIGNES DE SÉCURITÉ – LIRE AVANT UTILISATION pom_nd_fre_9/98 1-1. Signification des symboles Signifie Mise en garde ! Soyez vigilant ! Cette procédureprésente des risques de danger ! Ceux-ci sont identifiéspar des symboles adjacents aux directives. Y Identifie un message ...

Page 10 - LE BRUIT peut endommager l’ouïe.

OM-279 Page 6 D Isoler la pince de masse quand pas mis à la pièce pour éviter lecontact avec tout objet métallique. Il y a DU COURANT CONTINU IMPORTANT dansles convertisseurs après la suppression de l’ali-mentation électrique. D Arrêter les convertisseurs, débrancher le courant électrique, et dé-cha...

Page 13 - SECTION 2 – INSTALLATION; Specifications

OM-279 Page 9 SECTION 2 – INSTALLATION 2-1. Specifications Model Amperes Input at Rated Load Output 60 Hz Type of Plasma Rated Rated Cutting Maximum Open- Circuit Model 200 V 230 V 460 V 575 V KVA KW Output Gas Output Cutting Capacity Circuit Voltage DC Single- Phase 42.30 (3.40*) 36.80 (2.95*) 18.4...

Page 15 - Connecting Gas/Air Supply; Electrical Service Guide

OM-279 Page 11 2-6. Connecting Gas/Air Supply 1 Unit Gas Fitting (Female 1/4NPT) 2 Quick Connect Gas Fitting 3 Standard Gas Fitting Obtain and install desired fitting. 4 Hose Obtain suitable hose according toinstalled fitting, and connect to fit-ting. Route hose to gas/air supply. Adjust gas/air pre...

Page 16 - Placing Jumper Links

OM-279 Page 12 2-8. Placing Jumper Links Check input voltage available atsite. 1 Jumper Link Label Move jumper links to match inputvoltage and label on unit. Ref. 801 455 S-094 120-B 230 Volts 460 Volts 575 Volts L1 L2 L3 L1 L2 L3 L1 L2 L3 3/8 in Tools Needed: 230 VOLTS 460 VOLTS 200 VOLTS S-083 566...

Page 17 - Connecting Input Power

OM-279 Page 13 L1 (U) 2-9. Connecting Input Power 1 Strain Relief Clamp Route input and grounding conduc-tors through clamp to terminalboard. 2 Input And GroundingConductors 3 Line Disconnect Device Select type and size of overcurrentprotection using Section 2-7. 7/16 in 1/2 in Tools Needed: 3 OR 2 ...

Page 18 - SECTION 3 – OPERATION; Front Panel Controls

OM-279 Page 14 SECTION 3 – OPERATION 3-1. Front Panel Controls 1 Pilot Arc Switch Use switch to control pilot arc. Place switch in Expanded Metal position forcontinuous pilot arc. Use while cutting ex-panded metals only. . The Expanded Metal position keeps thepilot arc in the circuit at all times. L...

Page 19 - Setting Gas/Air Pressure

OM-279 Page 15 3-2. Setting Gas/Air Pressure Place controls in positions shown toadjust air pressure. Only gas/air cir-cuit is activated when the Powerswitch is turned On with OutputControl in Gas/Air Set position. 1 Pressure Gauge 2 Pressure Adjustment Knob Lift knob and turn to adjust pres-sure. P...

Page 20 - Sequence Of Operation

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. Install & Connect Equipment EXAMPLE...

Page 21 - SECTION 4 – MAINTENANCE & TROUBLESHOOTING; Routine Maintenance

OM-279 Page 17 SECTION 4 – MAINTENANCE & TROUBLESHOOTING 4-1. Routine Maintenance Y Disconnect power before maintaining. . Maintain more oftenduring severe conditions. Each Use Check Torch Tip, Electrode, And Shield Cup Check Gas/Air Pressure Every Week Check Shield Cup Shutdown System 3 Months ...

Page 22 - Trouble Lights; Checking Shield Cup Shutdown System

OM-279 Page 18 4-2. Trouble Lights 1 Pressure Light Lights if gas/air pressure is below40 PSI (276 kPa). Turn power Off, and check for prop-er gas/air pressure (see Section3-2). 2 Cup Light Lights if shield cup is loose. Turn power Off, and check shieldcup connection (see torch Owner’sManual). Power...

Page 23 - Troubleshooting

OM-279 Page 19 4-4. Troubleshooting Trouble Remedy No pilot arc; difficulty in establishing anarc. Clean or replace worn consumables as necessary (see torch Owner’s Manual). Check for damaged torch or torch cable (see torch Owner’s Manual). Have Factory Authorized Service Agent check power switch S1...

Page 25 - SECTION 5 – ELECTRICAL DIAGRAMS

OM-279 Page 21 SECTION 5 – ELECTRICAL DIAGRAMS 193 215 Figure 5-1. Circuit Diagram For 200/230/460 Volt Models

Page 27 - Notes

Page 28 - SECTION 6 – PARTS LIST

OM-279 Page 24 SECTION 6 – PARTS LIST 801 499-J . Hardware is common andnot 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. Main Assembly

Page 32 - Hobart Welding Products; Please complete and retain with your personal records.; Contact your Distributor for:; Resources Available; For technical assistance:

PRINTED IN USA  2000 Hobart Welding Products. 1/00 Hobart Welding Products An Illinois Tool Works Company600 West Main StreetTroy, OH 45373 USA For Technical Assistance:Call1-800-332-3281For Literature Or Nearest Dealer:Call 1-877-Hobart1 Model Name Serial/Style Number Purchase Date (Date which equ...