Victor ST411C 1A Acetylene Torch Manual

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400 SERIES HEAVY DUTY

STRAIGHT TORCH, TIP SERIES 1

PARTS, SERVICE

& REPAIR BULLETIN

ST411C-1A

VictorTechnologies.com

Issue Date: September 27, 2013

Manual No: 0056-3761 Revision: AA

2

Table of Contents

SECTION 1: GENERAL SAFETY INFORMATION ......................................2

1.01 Commonly Used Terms ...................................................2

SECTION 2: SPECIFICATIONS ................................................................3

2.01 ST411C-1A Victor Straight Torch ....................................3

2.02 Repair Parts List ..............................................................3

SECTION 3: SERVICE & REPAIR INSTRUCTIONS ...................................4

3.01 Recommended Tools & Supplies for Repair Procedures . 4

3.02 Cleaning Procedures .......................................................4

3.03 Handle for 400 Series Straight Torch ...............................4

3.04 Control Valve Repair Kit ...................................................5

3.05 Cutting Lever ................................................................... 5

3.06 High Pressure (H.P.) Oxy Valve Repair Kit .......................6

3.07 Check Valve Repair Kit .....................................................6

3.08 Fuel and Oxygen Inlet Connections..................................7

3.09 400 Series Head Repair Kit ..............................................7

3.10 Gas Feed Tubes ...............................................................8

SECTION 4: TEST PROCEDURES ...........................................................9

4.01 Recommended Tools & Supplies for Test Procedures .....9

4.02 Leak Testing the Torch .....................................................9

4.03 Flame Testing the Torch ...................................................9

SECTION 1: GENERAL SAFETY INFORMATION

Read and understand all safety and operating instructions provided before using this apparatus. RETAIN THESE INSTRUCTIONS IN A

READILY AVAILABLE LOCATION FOR FUTURE REFERENCE.

!

WARNING

DO NOT attempt to use this apparatus unless you are trained in its proper use or are under competent supervision. For your safety, practice

the safety and operating procedures described in this booklet every time you use the apparatus. Deviating from these procedures may result

in fire, explosion, property damage, and/or operator injury. If at any time the apparatus you are using does not perform in its usual manner, or

you have any difficulty in the use of the apparatus, STOP using it immediately. DO NOT use the apparatus until the problem has been corrected!

!

WARNING

Apparatus improperly operated, maintained or repaired can be dangerous. Some parts and accessories manufactured by others may fit

VICTOR apparatus but not conform to VICTOR’s exacting standards. For your own protection, specify and use ONLY VICTOR-made parts and

accessories with your VICTOR apparatus.

!

WARNING

Service or repair of apparatus should be performed only by a qualified repair technician capable of servicing gas apparatus in strict accordance

to applicable Part and Service bulletins for VICTOR manufactured products. Improper service repair, or modification of the product could result

in damage to the product or injury to the operator.

!

WARNING

WARNING: This product contains chemicals, including lead, known to the State of California to cause birth defects and other reproductive

harm. Wash hands after handling.

1.01 COMMONLY USED TERMS

BACKFIRE - The return of the flame into the torch, producing a popping sound. The flame will either extinguish or reignite at the tip.

SUSTAINED BACKFIRE - The return of the flame into the torch with continued burning within the torch. This condition may be accompanied

by a popping sound followed by a continuous hissing or whistling sound.

FLASHBACK - The return of the flame through the torch into the hose and even into the regulator. It may also reach the cylinder. This

condition could possibly cause an explosion in the system.

3

SECTION 2: SPECIFICATIONS

2.01 ST411C-1A VICTOR STRAIGHT TORCH

Cutting Tip Series 1

• Intuitive knobs: color coded, clearly marked lettering with increase/decrease label. Understandable in any language.

• Improved stainless lever provides increased comfort and reduced operator hand fatigue.

• Uses #000 - #8 cutting tips. One torch for all fuel gases (with proper tip).

• Inline stainless tubes for better visibility and reduced prole vs triangular design.

• Efcient universal head mixer reduces torch prole for better visibility. Optimized to use one cutting torch for all fuel gases.

1-7/8

2-1/2

21-1/8

3-1/4

All dimensions are approximate.

2.02 REPAIR PARTS LIST

Control Valve

Assemblies

400 Series Head 90˚

Gas Feed Tubes

Cutting Lever

High Pressure (H.P.) Oxy Valve

Tip

Nut

Inlet

Connection

Oxygen

Inlet

Connection

Fuel

Handle

Check

Valves

ST411C-1A

4

SECTION 3: SERVICE & REPAIR INSTRUCTIONS

3.01 RECOMMENDED TOOLS & SUPPLIES FOR REPAIR PROCEDURES

3/8”, 5/8”, 9/16”, and 11/16” Open-End Wrenches Vise

15/16” Box-End Wrench 45% Silver Solder

3/16” Drift Punch Silver Solder Flux

Small Hammer Loctite® #222 (Part Number 0028-0081)

1/4-20 Bolt Christo-Lube® 129 (Part Number 0034-0021)

Brazing Torch Hand Reamer RT-181

Pliers Fixture RT-148

Phillips Head Screwdriver Air Hose

NOTE

Disconnect the torch from any gas lines or other hardware before beginning any service or repair.

3.02 CLEANING PROCEDURES

Contact your local chemical supplier for recommended cleaning solvents applicable to the metals used in this product. Always use

cleaning solvents in accordance with the manufacturer’s instructions.

WARNING

DO NOT allow nonmetal components (seat, O-rings, dust seal, gaskets) to contact cleaning solvents! Cleaning solvents cause elastomeric

and plastic parts to swell and stress crack. If these parts require cleaning, use a mild soap solution, followed by a thorough rinsing in water.

Dry these parts completely before installing. REPLACE NONMETAL PARTS THAT HAVE COME IN CONTACT WITH OIL, GREASE OR ANY OTHER

PETROLEUM-BASED SUBSTANCE! Petroleum-based substances become dangerously flammable in the presence of oxygen.

3.03 HANDLE FOR 400 SERIES STRAIGHT TORCH

1

2

3

45

4

Figure 3-1

Item

No. Description Part number Qnty

Handle for 400 Series Straight Torch 0390-0096 1

1 Left Handle 0306-0296* 1

2 Right Handle 0306-0297* 1

3Long screw (self-threading) 1400-0250* 1

4Short screw (self-threading) 1400-0251* 2

5 Decal for ST411C-1A 1415-0847* 1

*Sold as part of kit only.

5

3.05 CUTTING LEVER

1

Figure 3-3

Item

No. Description Part number Qnty

1 Cutting Lever 0307-0004 1

Service

• Check the roll pin for wear.

• Make sure the cutting lever tabs are aligned with the groove

in the high pressure (H.P.) oxy valve stem.

Disassembly

Remove the handle before beginning this task (see Section 3.03).

1. Place xture RT-148 in a vise and place the torch in the

xture.

2. Use a drift punch to tap the roll pin out of the cutting lever

and the torch body. Inspect the roll pin and discard it if it is

deformed.

NOTE

The replacement roll pin part number is 1404-0002.

3. Slide the cutting lever forward.

Assembly

If the roll pin was discarded, acquire a replacement roll pin before

beginning this step.

1. Align the cutting lever tabs with the groove in the H.P. oxy

valve stem.

2. Insert the roll pin into the cutting lever and torch body. Gently

tap in the roll pin.

3. Make sure the cutting lever tabs are still properly aligned

with the groove in the H.P. oxy valve stem.

4. Remove the torch from RT-148 and reattach the handle.

Disassembly

1. Use a phillips head screwdriver to remove the three screws

from the handle.

2. Separate the left handle from the right handle and remove

them from the torch.

Assembly

1. Position the right and left handles in place over the gas feed

tubes. Ensure that the handles t over the tubes correctly.

2. Align the screw hole in each handle with the holes in the

torch and install both short, self-threading screws (see Figure

3-1).

3. Fasten the long, self-threading screw through the right

handle into the left handle.

4. Place the decal on the right handle as shown in Figure 3-1.

3.04 CONTROL VALVE REPAIR KIT

+

+

1

3

2

Figure 3-2

Item

No. Description Part number Qnty

Control Valve Repair Kit 0390-0086 2

1Valve Stem Assembly 0662-0102* 1

2Knob Decal (Red “F”) 1415-0864* 1

3Knob Decal (Green “O”) 1415-0863* 1

*Sold as part of kit only.

NOTE

This torch uses two control valves. Follow these steps to

service, disassemble, and assemble either control valve. The

control valve repair kit includes only one valve stem assembly.

Service

• Wipe with a dry cloth. Do not use any cleaning solvents.

• Check for leaks.

Disassembly

Remove the handle before beginning this task (see Section 3.03).

1. Place xture RT-148 in a vise and place the torch in the

xture.

2. Use a wrench to unscrew the control valve nut.

Assembly

1. Apply Christo-Lube® to the assembly threads.

2. Screw the control valve assembly into the torch body.

3. Use a wrench to tighten the control valve nut.

4. Place the correct decal on the knob (see Figure 3-2).

5. Remove the torch from RT-148 and reattach the handle.

6

1. Install the seat assembly bushing on the valve stem with

the open end facing up.

2. Install the spring on the valve stem until it is against the

bushing.

3. Install the washer followed by the small O-ring on the valve

stem.

4. Apply Christo-Lube® to the outside of the small O-ring and

along the valve stem.

5. Insert the seat assembly with the bushing, spring, washer,

and O-ring in through the valve cap.

6. Place the large O-ring around the outside of the valve cap

and apply Christo-Lube® to the large O-ring.

7. Screw the oxy valve assembly into the torch body and

wrench tighten. Confirm that the O-rings are seated

properly.

8. Reattach the cutting lever.

9. Remove the torch from RT-148 and reattach the handle.

10. Check for leaks.

3.07 CHECK VALVE REPAIR KIT

+

+

1

Figure 3-5

Item

No. Description Part number Qnty

Check Valve Repair Kit 0690-0027 1

1Check Valve 0652-0029 2

NOTE

Follow these steps to disassemble and assemble either

check valve.

Disassembly

1. Screw the 1/4-20 bolt into either check valve until it is nger

tight.

2. Place the shank of the bolt in the vise. The head of the bolt

must catch on the vise jaws, and the bolt must be able to

move freely.

3. Grab the torch rmly and pull the torch up. The head of the

bolt will catch on the vise jaws, and the check valve will pull

out of the torch.

4. Repeat steps 1 through 3 for the other check valve.

3.06 HIGH PRESSURE (H.P.) OXY VALVE REPAIR KIT

1

2

3

6

5

4

Figure 3-4

Item

No. Description Part number Qnty

H.P. Oxy Valve Repair Kit 0390-0043 1

1Seat Assembly 0320-0079 1

2Seat Assembly Bushing 0320-0108 1

3 Valve Spring 0320-0024 1

4Washer 1406-0006 1

5O-Ring (Small) 1407-0005 1

6O-Ring (Large) 1407-0016 1

CAUTION

Discard the used O-rings, seat assembly, seat assembly

bushing and washer. Replace them each time you reassemble

the torch.

Service

• Wipe with a dry cloth. Do not use any cleaning solvents.

• Check for leaks. Replacing O-rings requires disassembly.

Disassembly

Remove the handle and cutting lever before beginning this task

(see Sections 3.03 and 3.05).

1. Place xture RT-148 in a vise and place the torch in the

xture.

2. Use a wrench to loosen and unscrew the H.P. oxy valve

assembly from the torch body.

3. Remove the H.P. oxy valve assembly from the torch body.

Make sure the large O-ring is also removed.

Assembly

NOTE

Check the valve cap for wear. If the valve cap was discarded,

acquire a replacement valve cap before beginning these steps.

The replacement valve cap part number is 0320-0017.

7

Assembly

NOTE

This assembly requires a class “B” dual hose for oxygen and

fuel. The red hose connects to the fuel inlet connection. The

green hose connects to the oxygen inlet connection.

1. Press the check valve into the inlet connection.

2. Place the hose connection over the check valve and thread

it onto the inlet connection. Use a wrench to tighten the

hose connection onto the inlet connection until the check

valve is properly seated.

3. Remove the hose.

4. Repeat steps 1 through 3 for the other check valve.

3.08 FUEL AND OXYGEN INLET CONNECTIONS

+

+

1

2

Figure 3-6

Item

No. Description Part number Qnty

1 Inlet Connection Oxygen 0950-0099 1

2 Inlet Connection Fuel 0960-0073 1

NOTE

Follow these steps to disassemble and assemble either inlet

connection.

Disassembly

Remove the handle before beginning this task (see Section 3.03).

1. Place xture RT-148 in a vise and place the torch in the

xture.

2. Use a wrench to loosen and unscrew either inlet connection

from the torch.

3. Clean all debris from the inlet connection threads.

4. Repeat steps 2 and 3 for the other inlet connection.

Assembly

1. Apply a small amount of Loctite® to the beginning of the

inlet connection threads. Loctite® must completely cover

the beginning two threads of the inlet connection.

2. Screw the inlet connection onto the torch and wrench tighten.

3. Repeat steps 1 and 2 for the other inlet connection.

4. Remove the torch from RT-148 and reattach the handle.

5. Install the check valves (see Section 3.07, Assembly).

3.09 400 SERIES HEAD REPAIR KIT

CAUTION

Always wear gloves when handling heated parts.

1

2

Figure 3-7

Item

No. Description Part number Qnty

90° Victor Series 1 Head Repair Kit 0390-0085 1

1400 Series Head-90° Victor 0302-0247* 1

2 Mixer 0305-0519* 1

*Sold as part of kit only.

Service

• Remove the tip nut and tip and use an air hose to clear

any debris from the opening. Reattach the tip nut and tip.

NOTE

The 400 Series Head Repair Kit does not include the tip nut.

The tip nut part number is 0390-0088.

Disassembly

Remove the handle, control valves, cutting lever, H.P. oxy valve,

inlet connections, tip, and tip nut before beginning this task (see

Sections 3.03-3.06 and 3.08).

1. Place the torch body in a vise, positioned so that you have

full access to the 400 Series head.

2. Heat the gas feed tubes until the solder liquees. Use pliers

to remove the 400 Series head.

Assembly

1. Clean all solder and debris from the gas feed tubes.

2. Place the new 400 Series head on the gas feed tubes.

Conrm correct orientation to the 400 Series body.

3. Ensure that the center tube is pressed rmly against the

mixer of the head.

4. Solder the ttings and allow them to cool before beginning

the next step.

5. Use RT-181 to nish hand reaming the torch seat.

6. Remove all chips and debris from around the torch seat

area.

7. Reattach the tip nut, tip, inlet connections, H.P. oxy valve,

cutting lever, control valves, and handle.

8. Check for leaks and remove the torch from the vise.

8

3.10 GAS FEED TUBES

CAUTION

Always wear gloves when handling heated parts.

1 2

Figure 3-8

Item

No. Description Part number Qnty

Gas Feed Tubes 0390-0095 1

15/16” Tube 0303-0562* 2

23/8” Tube 0303-0564* 1

*Sold as part of kit only.

Service

• Check the tubes for leaks and wear.

Disassembly

Remove the handle, control valves, cutting lever, H.P. oxy valve, inlet connections, tip, tip nut, and 400 Series head before beginning

this task (see Sections 3.03-3.06 and 3.08-3.09).

1. Place the torch body in a vise, positioned so that you have full access to the gas feed tubes.

2. Heat the gas feed tubes until the solder liquees. Use pliers to remove all tubes.

3. Allow the torch body to cool before beginning assembly.

Assembly

1. Clean all solder and debris from the torch body.

2. Place a new 400 Series head in a vise, positioned so that the tube bores face up.

3. Insert the gas feed tubes into the 400 Series head, followed by the torch body. Conrm correct orientation to the 400 Series

head.

4. Ensure that the center tube is pressed rmly against the mixer of the head.

5. Solder the tting around the 400 Series head and repeat for the torch body side. Allow all parts to cool before beginning the

next step.

6. Complete steps 5 - 8 in Section 3.09, 400 Series Head Repair Kit, Assembly.

9

SECTION 4: TEST PROCEDURES

4.01 RECOMMENDED TOOLS & SUPPLIES FOR TEST PROCEDURES

Oil-free air or dry nitrogen supplies 2-1-101 Cutting tip

Oxygen and acetylene gas supplies 3/8”, 5/8”, 9/16”, and 11/16” Open-end wrenches

Small water tank 15/16” Box-end wrench

4.02 LEAK TESTING THE TORCH

1. Connect the torch to oil-free air or dry nitrogen supply lines with a matching type regulator.

2. Insert a plugged cutting tip into the torch.

3. Pressurize the hoses to 50+/-5 PSIG.

4. Completely submerse the torch in water.

5. Open the valve stem assemblies. Check for leaks around all external connections. Observe the valve stem assemblies. If bubbles

are escaping from around the valve stem assembly packing, tighten the packing nut until it takes 1-1/4 to 2 in-Ibs of torque to

adjust the valve stem assembly knobs.

6. Close the valve stem assembly knobs to a torque of 7-8 in-Ibs.

7. Remove the plugged cutting tip from the torch. Observe the torch head. If bubbles appear at the torch head, one or both of the

valve stem assemblies is leaking. Ream the valve seating surface using the RT-33 reseating tool. Repeat steps 2 through 7.

4.03 FLAME TESTING THE TORCH

1. Remove the torch from the water. Open the valve stem assemblies for 10 seconds. Once all the water has been removed from

the torch, disconnect the hoses from the oil-free air or dry nitrogen supply. Attach them to oxygen and acetylene gas supplies.

2. Install a 2-1-101 cutting tip in the head. Tighten the tip nut to 15-20 ft-Ibs of torque.

3. Adjust the oxygen to deliver 50+/-5 PSIG. Adjust the acetylene to deliver 7+/-2 PSIG.

4. Open the oxygen valve and purge the oxygen line for ve seconds. Then, close the oxygen valve. Open the fuel valve and purge

the fuel line for ve seconds.

5. Open the fuel valve stem assembly about 1/8 of a turn. Ignite the gas with a spark lighter. Continue opening the fuel valve until

the flame stops smoking.

6. Open the oxygen valve until a bright neutral flame appears.

7. Place the tip on a re brick at approximately 10° from the vertical (See Figure 4-1). Depress the cutting oxygen lever. Rock the

torch from side to side for 5-8 seconds. The torch will “pop” during this operation.

10˚

10˚

Fire Brick

Figure 4-1

10

!

WARNING

If you experience a backfire or backflash (flame disappears suddenly and/or a hissing sound IS heard when the flame is burning inside the

torch), IMMEDIATELY turn OFF first the oxygen valve and then the fuel valve. Allow the torch to cool before reusing it. If the trouble reoccurs,

disassemble the torch. Replace any damaged parts.

8. After testing is completed, release the cutting oxygen lever. Close the oxygen valve and the fuel valve.

9. Close the cylinder valve or gas supply.

10. Open the oxygen valve. Release the oxygen from the system. Once all the oxygen is released from the system, close the oxygen

valve.

11. Open the fuel valve. Release the fuel gas from the system. Once all the fuel gas is released from the system, close the fuel

valve.

12. Remove the hoses from the torch.

11

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