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Millerfi
December 1993
Form:
OM-1568B
Effective With
Style
No. KB-8
OWNERS
MANUAL
MTL-20 Torches
U
Read and follow these instructions and all
Give this manual
to
the
operator.
safety
blocks
carefully.
Have
only
trained and
qualified
persons
install,
operate,
or
service this unit.
Call your distributor if you do
not
understand
the directions.
For
help,
call your distributor
or:
MILLER Electric
Mfg.
Co.,
P.O. Box
1079,
Appleton,
WI 54912
414-734-9821
Water-Cooled Torches For GTAW
Welding
Rated At 250
Amperes
100%
Duty Cycle Using
Argon Shielding
Gas
.020 Thru 5/32 in
(0.5
Thru 4.0
mm) Tungsten
Size
Capacity
Includes 12-1/2 Or 25 ft
(3.8
Or
7.6
m)
Cable
Remote Contactor And Current Control Available
Tungsten
Electrode And Some Torch Parts Needed
cover
7/93
ST-141
476-A
'
1993
MILLER
Electric
MIg.
Co.
PRINTED IN
USA
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Related Manuals for Miller MTL-20 Torches
Summary of Contents for Miller MTL-20 Torches
- Page 1 Millerfi December 1993 Form: OM-1568B Effective With No. KB-8 Style OWNERS MANUAL MTL-20 Torches Water-Cooled Torches For GTAW Welding Rated At 250 Amperes 100% Duty Cycle Using Argon Shielding .020 Thru 5/32 in Thru 4.0 mm) Tungsten Size (0.5 Capacity Includes 12-1/2 Or 25 ft (3.8...
- Page 2 MILLERS TRUE BLU ETTM LIMITED WARRANTY Effective January 1, 1992 (Equipment with serial number newer) preface This limited sapersedes MILLER exclusive warranties warranty previous warranties with other expressed implied. gaarantees LIMITED WARRANTY Subject and conditions below, MILLER Electric Controls terms Remote original retail...
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Page 3: Emf Information
SAFETY PRECAUTIONS FOR GTAW TORCHES WARNING GTAW WELDING be hazardous. PROTECT YOURSELF AND OTHERS FROM POSSIBLE SERIOUS INJURY OR DEATH. KEEP CHILDREN AWAY. PACEMAKER WEARERS KEEP AWAY UNTIL CONSULTING YOUR DOCTOR. welding, jobs, certain hazards Welding is safe when precautions taken. -
Page 5: Safety Information
SECTION SAFETY INFORMATION modl,1 2193 Read all safety throughout this manual. messages Obey safety avoid injury. messages Learn the meaning WARNING and CAUTION. Safety Alert Symbol Signal Word WARNING possible death means CAUTION serious injury happen. __________ CAUTION possible minor means =fl~S~9I~,ngPOw&Of0r~11 injury... -
Page 6: Section 3-Installation
2-1. Duty Cycle CAUTION WELDING LONGER THAN RATED DUTY CYCLE torch and void damage warranty. not weld at rated load than shown below. longer wlwacnB.r 8/93 100% Duty Cycle At 250 Amperes Using Argon Definition Duty Cycle of 10 percentage minutes that torch weld rated load without... - Page 7 Flex-Lok Head 3-2. Adjusting CAUTION £~ TOOLS damage torch. torch flex-bk head. hand tools adjust Stem Head Hold stem turn head full turn. Turn head and stem to desired angle. Hold head until stem turn tight. Ret. ST-14~ 477-B 3-2. Adjusting Flex-Lok Head Figure...
- Page 8 Torch 3-3. Connecting READ SAFETY BLOCKS beginning of manual before proceeding. BUILDUP OF SHIELDING GAS harm health kill. Shut off shielding supply when not in use. 9/91 warnl.1 Turn Ott welding power source, and disconnect input power before installing torch. install high-frequency unit.
- Page 9 3-4. Coolant Guidelines WARNING ELECTRIC SHOCK MOVING INCORRECT COOLANT kill; will damage PARTS serious torch and injury. cooling system. can cause touch live electrical distilled parts. plain deionized water, high quality water. away from moving Keep parts. freezing mix of pure temperatures only Disconnect...
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Page 10: Maintenance And Troubleshooting
SECTION MAINTENANCE & TROUBLESHOOTING Iz$~J ~ READ SAFETY BLOCKS beginning of manual before proceeding. Turn Off all power before maintaining. Coolant Hose (Also Keep Hose Clean) Torch Cable 4-1. Maintenance Schedule Figure Table 4-1. Troubleshooting Before using trouble shooting table, check selection and preparation tungsten... -
Page 11: Tungsten Electrode
SECTION TUNGSTEN ELECTRODE mod2.1 3/93 NOTE ~ For additional in formation, yourdistributorfora handbook the Gas Tungsten Welding (GTA process. Wear clean gloves prevent contamination of electrode. tungsten Electrode Selecting Tungsten 5-1. Table 5-1. Tungsten Size Amperage Range Type, Polarity Electrode Argon Electrode Argon... - Page 12 5-2. Preparing Tungsten Electrode Tungsten Balled End Ball end of before tungsten welding by applying either an ac amperage slightly higher than what is recom 1-1/2 Times mendedforagiven electrode diam ______________________ Electrode Diameter Table 5.1), dc elec eter (see trode positive amperage.
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Page 13: Parts List
SECTION PARTS LIST 6-22. SB-141 Figure 6-1. Complete Torch Assembly Stock Model Item Description Quantity Figure 6-1. Complete Torch Assembly TUNGSTEN, electrode (consult welding supply distributor) your CUP, (see Figure 6-2) COLLET BODY, (see Figure 6-2) FL3L SERIES HEAD, (consisting of) 116 256 300HS HEAT... - Page 14 S - 0 7 6 7 7 / 1 6 R e v e r s e 4 C - X X X 7 C - X X X C o l l e t C o l l e t S h o r t 4 G L 5 3 2 1 1 9 9 1 0...
- Page 15 Table 6-1. Cross Reference To Competitive Model COMPETITIVE COMPETITIVE STOCK NO. MODEL NO. STOCK NO. MODEL NO. 119925 3CG16 116367 3C20 10N21 3AG4 119932 54N18 3C40 116368 10N22 119933 3AG5 54N17 116369 3C116 10N23 119 934 3AG6 54N16 116 370 3C332 10N24 3AG7...
- Page 17 OPTIONS AND ACCESSORIES For TOTAL TlG~ select system, of the each following items: welding source power torch .TIG (see kits listed below) .coolant (if using system water- cooled torch) FUSE BLOCK ASSEMBLY RFTC-H14 AMPERAGE AND CONTACTOR CONTROLS remote control. (For with water-cooled Torch handle with built-in...
- Page 18 OPTIONS AND ACCESSORIES GAS REGULATORS AF-150 (#127 662) TORCH CABLE COVERS HRF-2425 (#127 661) The AF-1 50 is flowgauge regulator Reinforced plastic cable covers which includes the 580 CGA inlet made of tear and flame resistant The HRF-2425 regulator/flowmeter with argon and material.
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