INSTRUCTIONS for
C-66-1400 CUTTING TORCHES
These INSTRUCTIONS are for experienced operators. If you are not fully familiar with the principles of operation and safe practices for oxy-fuel gas equipment, we urge you to read ESAB booklet “Precautions and Safe
Practices for Welding, Cutting and Heating,” Form 2035. Do NOT permit untrained persons to operate this
equipment. DO NOT attempt to operate this equipment until you have read and fully understand these instructions. If you do not fully understand these instructions, contact your supplier for further information.
The cutting torches covered by these instructions are listed by Underwriter’s Laboratories only when using
parts manufactured to ESAB Welding & Cutting Products specifications on file with Underwriter’s Laboratories, Inc., and when they are used in the gas service for which they are designed and listed. The use of other
parts that cause damage or failure to the equipment will void the manufacturer’s warranty.
F-12-254-D
May, 2001
OPERATING INSTRUCTIONS
The C-66-1400 torch is an enhanced version of the wellestablished OXWELD C-66 torch. It is equipped with a
“C” size oxygen inlet and designed for use with the larger
OXWELD 1400 series cutting nozzles.
The C-66-1400 can be used with any fuel gas EXCEPT acetylene. Use of acetylene can cause a flashback which can cause serious burns and damage
the torch.
Be sure gas flow is sufficient for nozzle size.
Adjust regulators for proper psig pressures.
Adjust throttle valves properly.
Keep torch in good repair.
DO NOT throttle back gases to use large nozzle on
thin material.
CONNECTING
1. To obtain the best performance from the torch, ½in. oxygen hose with standard “C” size fittings, such
as P/N 2120399 (50-ft.) must be used. Attach ½-in.
oxygen hose to the oxygen regulator; attach 3/8-in
fuel gas hose, such as P/N 2060397 (50-ft.) to the
fuel gas regulator.
Note: 3/8-in. oxygen hose with “B” size connectors
may be used but torch performance will be reduced. To use 3/8-in. oxygen hose order P/N
18X19 “C” to “B” adaptor.
2. Using Regulation Panel (recommended) – Attach
supply hoses to outlets of regulation panel and to
torch inlets.
3. Using regulators – Attach oxygen and fuel gas regulators to the supply station outlets; attach supply
hoses to regulators and to torch inlets.
4. Attach nozzle to torch head and tighten connection
nut with a wrench.
5. Check throttle valve packing nuts for tightness.
ADJUSTING GAS PRESSURES
Fuel Gas: If fuel gas is supplied from a station outlet
without a regulator, merely open the station valve. If fuel
gas is being supplied through a station or cylinder regulator, open the fuel gas valve on the torch, turn in the
pressure-adjusting screw on the regulator until the regulator delivery-pressure gauge indicates the desired pressure (see chart on page 4).
Oxygen: Open the cutting oxygen valve by depressing
its valve lever fully. Turn in the pressure-adjusting screw
until the regulator delivery gauge registers the desired
pressure (see cutting chart on page 4). Then release
the cutting oxygen lever.
Be sure this information reaches the operator.
You can get extra copies through your supplier.
SAFETY PRECAUTIONS
These Safety Precautions are for your protection. They summarize precautionary information from the references listed
in Additional Safety Information section. Before performing any
installation or operating procedures, be sure to read and follow the safety precautions listed below as well as all other
manuals, material safety data sheets, labels, etc. Failure to observe Safety Precautions can result in injury or death.
PROTECT YOURSELF AND OTHERS - Some
welding, cutting and gouging processes are
noisy and require ear protection. Hot metal can
cause skin burns and heat rays may injure
eyes. Training in the proper use of the processes and equipment is essential to prevent
accidents. Also:
1. Always wear safety glasses with side shields in any work area,
even if welding helmets, face shields, or goggles are also required.
2. Wear flameproof gauntlet type gloves, heavy long-sleeve shirt,
cuffless trousers, high-topped shoes, and a welding helmet or
cap for hair protection, to protect against hot sparks and hot
metal. A flameproof apron may also be desirable as protection
against radiated heat and sparks.
3. Hot sparks or metal can lodge in rolled up sleeves, trousers
cuffs, or pockets. Sleeves and collars should be kept buttoned,
and open pockets eliminated from the front of clothing.
4. Protect other personnel from hot sparks with a suitable nonflammable partition or curtains.
5. Use goggles over safety glasses when chipping slag or grinding. Chipped slag may be hot and can travel considerable distances. Bystanders should also wear goggles over safety
glasses.
FIRES AND EXPLOSIONS - Heat from a flame
can act as an ignition source. Hot slag or sparks
can also cause fires or explosions. Therefore:
1. Remove all combustible materials well away from the work
area or completely cover the materials with a protective nonflammable covering. Combustible materials include wood,
cloth, sawdust, liquid and gas fuels, solvents, paints and coatings, paper, etc.
2. Hot sparks or hot metal can fall through cracks or crevices in
floors or wall openings and cause a hidden smoldering fire on
the floor below. Make certain that such openings are protected
from hot sparks and metal.
3. Do not weld, cut, or perform any other hot work on materials,
containers, or piping until it has been completely cleaned so
that no substances on the material can produce flammable or
toxic vapors. Do not do hot work on closed containers. They
may explode.
4. Have fire extinguishing equipment handy for instant use, such
as a garden hose, a pail of water or sand, or portable fire
extinguisher. Be sure you are trained in its use.
5. After completing operations, inspect the work area to be sure
that there are no hot sparks or hot metal which could cause a
later fire. Use fire watchers when necessary.
6. For additional information, refer to NFPA Standard 51B, “Fire
Prevention in Use of Cutting and Welding Processes”, which
is available from the National Fire Protection Association,
Batterymarch Park, Quincy, MA 02269.
FUMES AND GASES - Fumes and gases, particularly in confined spaces, can cause discomfort or injury. Do not breathe fumes or
gases from welding or cutting, Therefore:
1. Always provide adequate ventilation in the work area by natural or mechanical ventilation means. Do not weld, cut, or gouge
on materials such as galvanized steel, stainless steel, copper,
zinc, lead, beryllium, or cadmium unless positive mechanical
ventilation is provided. Do not breathe fumes and gases from
these materials.
2. If you develop momentary eye, nose, or throat irritation while
operating, this is an indication that ventilation is not adequate.
Stop work at once and take necessary steps to improve ventilation in the work area. Do not continue to operate if physical
discomfort persists.
3. Refer to ANSI/ASC Standard Z49.1 listed below for specific
ventilation recommendations.
4. WARNING: This product, when used for welding or
1. Always have qualified personnel perform the installation,
troubleshooting, and maintenance work. Do not operate or
repair any equipment unless you are qualified to do so.
2. Keep all oxy-fuel equipment free of grease or oil. Grease, oil,
and other similar combustible materials, when ignited, can burn
violently in the presence of oxygen.
3. Do not abuse any equipment or accessories. Keep equipment
away from heat and wet conditions, oil or grease, corrosive
atmospheres and inclement weather.
4. Keep all safety devices in position and in good repair.
5. Use equipment for its intended purpose. Do not modify it in
any manner.
1. Use the proper gas for the process and use the proper pressure reducing regulator designed to operate from the compressed gas cylinder. Do not use adaptors to mount the regulator on the cylinder. Maintain hoses and fittings in good condition. Follow manufacturer’s operating instructions for mounting the regulator to the gas cylinder.
2. Always secure cylinders in an upright position by chain or strap
to suitable hand trucks, benches, walls, post, or racks. Never
secure cylinders to work tables or fixtures where they may
become part of an electrical circuit.
3. When not in use, keep cylinder valves closed. Have the valve
protection cap in place on top of the cylinder if no regulators is
installed. Secure and move cylinders by using suitable hand
trucks. Avoid rough handling of cylinders.
4. Locate cylinders away from heat, sparks, or flame of a welding, cutting, or gouging operation. Never strike an arc on a
cylinder.
5. For additional information, refer to CGA Standard P-1, “Precautions for Safe Handling of Compressed Gases in Cylinders:, which is available from the Compressed Gas Association, 1235 Jefferson Davis Highway, Arlington, VA 22202.
The following publications, which are available from the American
Welding Society, 550 N.W. LeJuene Road, Miami, FL 33126, are
recommended to you:
1. ANSI/AWS Z49.1 - “Safety in Welding and Cutting”.
2. AWS F4.1 - “Recommended Safe Practices for the Preparation for Welding and Cutting of Containers and Piping That
Have Held Hazardous Substances”/
3. AWS SP - “Safe Practices” - Reprint, Welding Handbook.
cutting, produces fumes or gases which
contain chemicals known to the State of
California to cause birth defects and, in
some cases, cancer. (California Health &
Safety Code §25249.5 et seq.)
EQUIPMENT MAINTENANCE - Faulty or improperly maintained equipment, such as torches, hoses
and regulators, can result in poor work, but even
more important, it can cause injury or death
through fires. Therefore:
GAS CYLINDER HANDLING - Gas cylinders, if mishandled, can rupture or explode violently. Sudden
rupture of a cylinder, valve or relief device can injure or kill you. Therefore:
ADDITIONAL SAFETY INFORMATION - For more
information on safe practices for oxy-fuel welding
and cutting equipment, ask your distributor for a
copy of “Precautions and Safe Practices for Gas
Welding, Cutting, and Heating”, Form 2035. Gas
apparatus safety guidelines are also available on
video cassettes from your distributor.
MEANING OF SYMBOLS - As used throughout
this manual: Means Attention! Be Alert! Your
safety is involved.
Means immediate hazards which, if not avoided,
will result in immediate, serious personal in-
jury or loss of life.
Means potential hazards which could result in
personal injury or loss of life.
Means hazards which could result in minor
personal injury.
2
SP-GA 10/98
Note: The gas pressures given in the cutting chart on
page 4 are measured at the torch inlet connections with gases flowing. Since Pressure drop
through the hose can vary appreciably due to
nozzle size flow requirements, length and condition of hose, the use of test gauge adaptors
(P/N 21X48 for oxygen and P/N 639422 for fuel
gas) connected between hose and torch connection is recommended. The test gauges can
be removed after the regulator pressures have
been determined.
TESTING FOR LEAKS
Every cutting outfit should be thoroughly tested for leaks
after it is first hooked up, and at regular intervals thereafter. After all connections have been made, make sure
all valves on the torch handle are closed. Then adjust
regulators, or open station valves, to apply 60 psi oxygen and up to 10 psi fuel gas pressure on the hoses.
Using Leak Test Solution (P/N 998771), or any other
solution suitable for oxygen service, check for leaks at
the gas supply valves, the gas supply-to-regulator connections, the regulator-to-hose connections, and the
hose-to-torch connections. If bubbling at any point indicates leakage, close the appropriate supply valve, open
the corresponding torch valve to remove all pressure
from the line, and finally release the regulator pressure
adjusting screw by turning it counter-clockwise; then
break the leaky connection, wipe metal seating surfaces
with a clean dry cloth, and examine them for nicks and
scratches. Remake the connection(s) and re-test. Do
not try to light the torch until you are satisfied that all
connections are gas-tight.
After lighting the torch and adjusting the flames, use leak
test solution to check for leakage at all torch valves and
at the nozzle nut.
LIGHTING AND FLAME ADJUSTMENT
1. Open the preheat oxygen valve one turn or less.
2. Open the fuel gas valve wide (two turns) and light
the gas at the nozzle with a friction lighter. DO NOT
USE A MATCH. Use of a match can seriously burn
your hand.
3. Then open the cutting oxygen valve and adjust
flames with preheat valve. Flames are hottest when
inner cones are shortest. Do not throttle the fuel gas
valve unless flames blow off or burn away from end
of nozzle.
NOTE: Because of the several factors involved (injec-
tor, nozzle size, gas pressures) the adjustment
procedures given above do not apply in all situations. However, this is a good rule-of-thumb if
you want preheat flames at maximum effectiveness. You should usually be able to keep one
preheat valve wide open if regulator pressure
has been set correctly for the nozzle in use.
SHUTTING OFF
Release the cutting oxygen lever. Then close the fuel
gas valve, and finally the preheat oxygen valve.
If operations are to be stopped for half-hour or more, all
pressure should be released from the torch, hoses, and
regulators by doing the following:
1. Close each supply or station valve.
2. Open torch valves.
3. After relieving the gases, back out the pressure-adjusting screw of each regulator and close the torch
valves.
OPERATING PRECAUTIONS
Flow: There must be proper flow of gases for safe op-
eration and full performance. This requires the following
three conditions: (1) the regulators that determine the
inlet pressure to the hoses must be set to the correct
pressure; (2) the hoses and their connectors must have
adequate capacity for the job (hoses that are too long,
too small or have connectors with small passageways
can cause problems); and (3) the throttle valves on the
torch must be adjusted with the procedure shown in these
instructions.
Note: Items (1) and (2) can be checked by measuring
the gas pressures at the torch with gases flowing.
Gauge adaptors are available for this purpose (see
"Adjusting Gas Pressures".
Backfire: Improper operation of the torch may cause
the flames to go out with a loud “pop”. Such a backfire
may be caused by contact of nozzle with the work, spatter from the work, by the use of improper gas pressures,
or by leakage at the cutting nozzle seats due to nicks on
seats or to a loose nozzle nut.
Flashback: Under certain circumstances, the flame may
not “pop” out (backfire) but instead burn back inside the
torch with a shrill hissing or squeal. This is called a “flashback”. A flashback should never occur if (1) the equipment is in good condition; (2) preheat ports on cutting
nozzles are cleaned frequently; (3) operating pressure
are correct; (4) throttle valves are adjusted properly.
Should a flashback occur, IMMEDIATELY shut off the
torch. Allow it to cool for at least a minute. Then check
your nozzle, gas pressure, re-adjust regulators if necessary, and relight the torch. If flashback recurs, send the
torch to ESAB Remanufacturing Center, 411 S. Ebenezer
Road, Florence, SC 29501 for repair.
3
OPERATING DATA, CLEANING DATA, & PART NUMBERS
GENERAL NOTES:
1. Pressures given are measured at the torch with gases flowing; therefore pressure drop through the hoses should
be considered when setting pressures at the regulators.
2. The table shows average values based on typical conditions. The type and quality of steel, its surface condition,
the purity of the oxygen, etc. will always have a bearing on the end results.
3. Use ½-in. size hose for oxygen and 3/8-in. hose for fuel gas.
OXWELD 1427 Series Natural Gas Nozzles - Non-Metric Dimensions
Nozzle Steel Gas Pressure, psig Cutting Cleaning Gas Consumption, cfh
Size Part No. In. Oxygen Oxygen Gas In./min. Preheat Cutting Oxygen Oxygen Gas
12 5470099 12 75-85 8-10 16-19 4-5 55 31 800-900 100-115 65-75
14 5470144 14 60-70 7-9 8-11 3.5-4.5 54 28 950-1100 115-140 75-95
16 5470100 16 55-65 9-12 11-15 3-4.5 53 20 1150-1330 145-175 95-115
20 5460192 20 45-55 13-18 17-23 2.5-4 52 8 1450-1700 170-225 125-150
24 5460162 24 40-50 21-25 28-33 2-3.5 51 C 1850-2200 225-285 170-190
28 5460193 28 30-40 28-33 39-45 2-3.5 50 K 1950-2400 315-350 210-235
Thickness, Cutting Preheat Natural Speed, Drill Size Cutting Preheat Natural
OXWELD 1427 Series Natural Gas Nozzles - Metric Dimensions
Nozzle Steel Gas Pressure, bars Cutting Cleaning Gas Consumption, m3/hr
Size Part No. mm Oxygen Oxygen Gas mm/min. Preheat Cutting Oxygen Oxygen Gas
12 5470099 300 5.3-6.0 0.6-0.7 1.1-1.3 100-125 55 31 22.7-25.5 2.8-3.3 1.8-2.1
14 5470144 350 4.2-4.9 0.5-0.6 0.6-0.8 90-115 54 28 26.9-31.2 3.3-4.0 2.1-2.7
16 5470100 400 3.9-4.6 0.6-0.8 0.8-1.1 75-115 53 20 32.6-37.7 4.1-5.0 2.7-3.3
20 5460192 500 3.2-3.9 0.9-1.3 1.2-2.3 65-100 52 8 41.1-48.0 4.8-6.4 3.5-4.2
24 5460162 600 2.8-3.5 1.5-1.8 2.0-2.3 50-90 51 C 52.4-62.3 7.2-8.1 4.8-5.4
28 5460193 700 2.1-2.8 2.0-2.8 2.7-3.2 50-90 50 K 55.2-68.0 8.9-9.9 5.9-6.7
Thickness, Cutting Preheat Natural Speed, Drill Size Cutting Preheat Natural
4
MAINTENANCE INSTRUCTIONS
For all repairs other than those covered below, send the
apparatus to the nearest ESAB distributor or to ESAB
Remanufacturing Center, 411 S. Ebenezer Road, Florence, SC 29501. Improperly repaired apparatus is hazardous.
Preheat Valves: Leakage around either throttle valve
can usually be corrected by tightening packing nut
slightly. If this does not stop the leakage, replace the
valve assembly.
If either preheat valve fails to shut off completely, remove the valve assembly from the torch. With clean
cloth, wipe the ball in the end of the stem. Then reinsert
valve assembly and tighten it several times with maximum force. If this not eliminate leakage, try a new valve
stem assembly. If then the valve does not shut off completely, send the torch to a repair station for reseating of
the body.
3. Pull stem out of guide. Replace it with new part unless the molded rubber seat appears to be in excellent condition.
4. Remove the internal O-ring (85W10) from the guide
and insert a new O-ring. Replace the external Oring (86W70) if it shows distinct signs of wear.
5. Reassemble by placing retaining washer and spring
in guide, then placing stem through spring and Oring in guide.
6. Screw valve assembly into body. Before reassembling cutting lever, connect torch to oxygen source,
apply at least 60 psi pressure, and check for leakage through valve, around stem, and around the
guide.
7. Reassemble cutting lever to torch.
Injector: To remove the injector for inspection or replacement, first unscrew the injector chamber plug and remove the injector spring. Then run a long No. 10-32 machine screw into the threads in the end of the injector
and withdraw the injector by pulling on the screw.
After installing a new throttle valve assembly, tighten the
packing nut until the valve can be turned with great difficulty, and set the unit aside, for three of four hours at
least, to set the packing. Then back off the packing nut
until the valve turns readily.
Cutting Valve: If leakage develops around the cutting
valve stem or between the cutting valve guide and the
torch body, or if the cutting valve fails to shut off completely, proceed as follows:
1. Remove cutting valve lever by merely driving out
the fulcrum spiral-pin, using a drill or piece of rod (7/
32-in. dia. or smaller).
2. Unscrew cutting valve guide and lift out entire valve
assembly: guide (with external and internal O-rings)
valve stem, spring, and O-ring retaining washer.
Before reinstalling a previously-used injector, be sure
that the O-rings at each end of the injector assembly
are in good condition. Replace them if necessary. Also
be sure the injector chamber plug is fitted with an O-ring
in good condition.
Cleaning Cutting Nozzles: Cutting nozzle orifices
should be cleaned by hand using OXWELD tip cleaners, whenever a flame distortion is noticed. Maintaining
clean orifices is highly recommended for reducing any
incidence of flashbacks. If you do not have tip cleaners,
twist drills of the correct sizes (see table on pg. 4) may
be used. Insert the drill carefully, and push it back and
forth. DO NOT TWIST THE DRILL.
5
GUIDE - 638243
“O”-RING - 86W70
“O”-RING - 85W10
WASHER - 638241
SPRING - 29Z97
STEM - 638891
*OXY CONNECTION
20124
SB
SS
999082*
F.G. CONNECTION
STEM
(2) 54A87
ASSEMBLY
PIN
62399001
50Z38
51Z31
INSERT
50Z37
THUMBPIECE
PIN
62320009
No. 52 (.0635) DRILL
DRILL AT ASSEMBLY
LATCH
638981
LEVER ASSEMBLY
SS
SB
MIXER TUBE - 999898*
OXY. TUBE - 26Z03*
SB
See Table & Notes
*BODY - 638978
SB
61325849
(2) SCREW - No. 6-32 x 1/4"
HANDLE - 20141
819062
BUSHING
COUPLING - 150Z35*
134Z55
86W85
40A39
86W04
PLUG
“O”-RING
SPRING
“O”-RING
48-in. - 180-deg. Head ......................................... Part No. 718322
60-in. - 75-deg. Head ............................................ Part No. 718323
C-66-1400 Cutting Torches Assemblies
60-in. - 180-deg. Head ......................................... Part No. 718324
72-in. - 75-deg. Head ............................................ Part No. 718325
72-in. - 180-deg. Head ......................................... Part No. 718326
OXY. TUBE EXT.*
MIXER TUBE EXT.*
BRACKET - 718308*
HEAD (180°) - 972778*
1"—20 Tap - 49228100
(indicated by *) should be replaced only by an authorized ESAB distributor repair facility or
by ESAB Remanufacturing Center, 411 S. Ebenezer Rd., Florence, SC 29501.
tension must be cut back 7/8" if using the 180-degree head.
Long and must be cut to proper length.
NOTES:
1. “SB” and “SS” indicate silver brazed and soft solder joints. Parts that are silver brazed
2. Brackets 718308, are equally spaced between head and coupling. Also, oxygen tube ex-
3. Oxy. Tube Ext. - Order 04027232, Mixer Tube Ext. - Order 04027250. Tubes are 12 ft.
ACCESSORIES: Nozzle Reseating Tool - 5230151
1" — 20 UNEF
6
SB
SB
NUT
33A34
187W01 “O”-RING
HEAD (75°) - 160Z27*
2117834
HEAD (90°)
INJECTOR ASSEMBLY - 01Y58
(Not Shown)
32-in. - 75-deg. Head ............................................ Part No. 718317
32-in. - 180-deg. Head ......................................... Part No. 718318
42-in. - 75-deg. Head ............................................ Part No. 718319
42-in. - 180-deg. Head ......................................... Part No. 718320
48-in. - 75-deg. Head ............................................ Part No. 718321
For other available lengths of
C-66-1400 Torches contact your
salesman or ESAB distributor.
7
ESAB Welding & Cutting Products, Florence, SC Welding Equipment
COMMUNICATION GUIDE - CUSTOMER SERVICES
A. CUSTOMER SERVICE QUESTIONS:
Order Entry Product Availability Pricing Delivery
Order Changes Saleable Goods Returns Shipping Information
Telephone: (800)362-7080 / Fax: (800) 634-7548
Telephone: (800)783-5360 / Fax: (800) 783-5362
Telephone: (800) 235-4012/ Fax: (888) 586-4670
B. ENGINEERING SERVICE: Telephone: (843) 664-4416 / Fax : (800) 446-5693
Welding Equipment Troubleshooting Hours: 7:30 AM to 5:00 PM EST
Warranty Returns Authorized Repair Stations
C. TECHNICAL SERVICE: Telephone: (800) ESAB-123/ Fax: (843) 664-4452
Part Numbers Technical Applications Hours: 8:00 AM to 5:00 PM EST
Performance Features Technical Specifications Equipment Recommendations
D. LITERATURE REQUESTS: Telephone: (843) 664-5562 / Fax: (843) 664-5548
E. WELDING EQUIPMENT REPAIRS: Telephone: (843) 664-4487 / Fax: (843) 664-5557
Repair Estimates Repair Status Hours: 7:30 AM to 3:30 PM EST
F. WELDING EQUIPMENT TRAINING:
Telephone: (843)664-4428 / Fax: (843) 679-5864
Training School Information and Registrations Hours: 7:30 AM to 4:00 PM EST
G. WELDING PROCESS ASSISTANCE:
Telephone: (800) ESAB-123 / Fax: (843) 664-4454 Hours: 7:30 AM to 4:00 PM EST
H. TECHNICAL ASST. CONSUMABLES:
Telephone : (800) 933-7070 Hours: 7:30 AM to 5:00 PM EST
Eastern Distribution Center
Central Distribution Center
Western Distribution Center
Hours: 7:30 AM to 4:00 PM EST
IF YOU DO NOT KNOW WHOM TO CALL
Telephone: (800) ESAB-123/ Fax: (843) 664-4452/ Web:http://www.esab.com
F-12-254-D 05/2001 Printed in U.S.A.
Hours: 7:30 AM to 5:00 PM EST
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