FORM: OM-1 568 March 1988 Effective With Millerfi Style No. JJ-23 MODEL MTTF-251 2W MTTF-2525W FILE COPY RETURN TO FOLDER OWNERS IMPORTANT MANUAL Read and understand the entire contents of this manual. special emphasis on the safety material throughout the manual, before installing, operating, or maintaining this equipment. This unit and these instructions are for use only by persons trained and experienced in the safe operation of welding equipment.
. LIMITED WARRANTY EFFECTIVE: FEBRUARY 16. 1988 supersedes This warranty all previous MILLER warranties and LIMITED WARRANTY warrants to - Miller Electric tions hereof, Subject to the terms Mfg. Co., Appleton, its Distributor/Dealer that all new is and condi- Wisconsin and unused Equipment furnished by Miller is free from defect in workmanship and material as of the time and place of delivery by Miller.
SECTION 1 UNSAFE PROCEDURES OR PRAC- WARNING: TICES - can cause personal injury serious death. or SAFETY RULES PROTECT EYES AND 1 -3. SKIN FROM ARC RAYS; PROTECT EARS FROM NOISE Read, understand, and follow ALL of these safeLy rules before installing, operating, or servicing this equipment. Be sure that all end users of this equipment, the Arc rays from the welding process produce intense heat and strong ultraviolet rays that can burn eyes and skin.
1 6. PROVIDE S ITU ATIO N S PROTECTION - FOR SPECIAL 1 -8. ADDITIONAL SAFETY INFORMATION information on safe practices for setting up operating electric welding and cutting equipment and on good working habits, ask your welding equip ment supplier. The following publications, which are available from the American Welding Society, 550 For Do not weld or cut containers or materials which have held or been in contact with hazardous substances unless they are properly cleaned and a. inspected.
SECTION 2 INTRODUCTION - Ampere Rating Model Duty Cycle Size DCEN; ACHF 250 Amperes With Argon Torch Cooling Length Body Method 12.5 ft. Length: (3.8 m) 9.5 in. (241.0 mm) Handle Diameter: 0.75 in. (19.0 mm) Cable Capacity MTTF-2512 .020 thru 5/32 in. (0.5 thru 4.0 mm) MTTF-2525 25 ft. Figure 2 - 5.0 1. 1. DUTY CYCLE The duty cycle of a welding torch is the percentage of a ten minute period that a torch can be operated at a given load.
SECTION 3 - Flex Loc Head INSTALLATION Short Backc.p Handle 0-ring / 1 Cup Tungsten Electrode r Notches indicate left-hand Hose threaded coolant fitting 0 RequIred Consumable. and Accessories Welding Equipment Supplier Power Cable/Coolant-Out Hose Obtaln from Power Cable Adapter Figure ELECTRIC SHOCK WARNING: can 3 - 1. Torch kill. Components 5. Do not touch live electrical parts. Shut down we/ding power source and disconnect employing lockout/tagging pro installing torch.
3 -3. COOLANT REQUIREMENTS freezing conditions may be encountered, mix coolant according to the manufacturers recommenda tions for the ambient temperature encountered. Where INCORRECT COOLANT LEVEL system and torch. Maintain correct coolant level at all times. CAUTION can _______ damage TA-120 998 cooant This torch is rated at a 1 qt./min (0.94 I/mm) coolant flow rate. Changes in flow rate may effect operating temperature of torch. Maintain proper flow rate at all times. Figure 3 - 2.
Regulator! Flowmeter Torch Coolant Return Coolant Out Coolant In 4 Work Clamp Gas Cylinder TA-120 870 Figure 3 - SECTION ELECTRIC SHOCK WARNING 4. GTAW Torch Connection 4 - SEQUENCE OF OPERATION kill. can With 5. Set power 6. Wear Do not touch live electrical parts. covers and in handle place open gas while ARC RAYS, SPARKS, AND HOT SURFACES can burn eyes and skin; NOISE can damage hearing. Wear correct eye, ear, and body protection.
SECTION 5 - MAINTENANCE 1. INSPECTION AND UPKEEP Usage and shop conditions will determine frequency and type of maintenance required. Perform inspections, once a Inspect cables for breaks in insulation, and week. all connections 5 - WARNING ELECTRIC SHOCK can kill; HOT SURFACES can cause severe burns. Do not touch live electrical parts. Shut down welding power source before working on torch from welding power source before inspecting, maintaining, or servicing.
Table 5 Electrode Diameter - 1. Tungsten Size Chart Amperage Range Tungsten Electrode Straight Polarity .020 5-20 15-80 70-150 1/16 3/32 1/8 5/32 - Gas Type Electrode Positive! Reverse Polarity Negative/ (Green Band) .040 Polarity DC-Argon DC-Argon Pure - * ~ 10-20 15-30 25-40 40-55 125-225 225-360 360-450 AC-Argon Using High Frequency .
Item No. Miller Stock No. Figure Miller Model No. A Complete 7 5 5 118 526 115256 116 203 116260 tll.
Orif ce Cup 1/4 5/16 3/8 7/16 3/16 1/4 5/16 20 -425 375- 0 4C532 1 6378 7C532 1 6384 4CB532 1 63 0 1/8 (3.2) 150-325 2 0-350 4C415 1 637 7C418 1 638 4CB415 1 6359 3/32 (2.41 10 -235 150.250 4C3 2 1 6376 7C3 2 1 6382 4CB3 2 1 6358 1/16 (1.6) 50.150 70-150 4C1 6 1 6375 7C1 6 1 6381 4CB1 6 1 8357 .040 (1.0) 10.80 15.80 4C40 1 6374 7C40 1 6380 4CB40 1 6356 .020 (0.5) 5-20 5-20 4C20 1 637 7C20 1 6379 4CB20 1)53 5 3/8 1/4 5/16 3/8 7/16 1/2 5/8 Ran., Cal er 7C.SX ~) 0 ,.SUOATFRNED Adeptr. Bode CB.
CROSS REFERENCE TO COMPETITIVE MODEL MILLER STOCK NO. MILLER MODEL NO. COMPETITI VE NO.
