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LINER REMOVAL AND REPLACEMENT
CAUTION
NOTE: Changing the liner for a different wire size requires replacement of the gas diffuser per Table D.1 to properly secure the different liner.
LINER REMOVAL, INSTALLATION AND TRIMMING INSTRUCTIONS FOR MAGNUM 250L
NOTE: The variation in cable lengths prevents the interchangeability of liners between guns. Once a liner has been cut for a particular gun, it should not be installed in another gun unless it can meet the liner cutoff length requirement. Liners are shipped with the jacket of the liner extended the proper amount.
7.Screw the gas diffuser onto the end of the gun tube and securely tighten. Be sure the gas diffuser is correct for the liner being used. (See table and dif- fuser stencil.)
8.Tighten the set screw in the side of the gas diffuser against the cable liner using a 5/64" (2.0 mm) Allen wrench.
CAUTION
This screw should only be gently tightened. Overtightening will split or collapse the liner and cause poor wire feeding.
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| FIG D.1 |
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| TABLE D.1 |
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| SET SCREW |
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| BRASS CABLE CONNECTOR | |||
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| Fixed | Adjustable |
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| (31.8mm) |
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| Nozzle | Nozzle |
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| LINER |
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| TRIM | ||
| Replacement |
| Size Stencilled | Gas Diffuser | Gas Diffuser |
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| LENGTH |
Diameter of | Liner Part |
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Electrodes Used | Number |
| Liner Bushing | (and Stencil) | (and Stencil) |
| SET SCREW |
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| .030 (0.8 mm) |
| GAS DIFFUSER |
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| .045 (1.2 mm) | NOZZLE INSULATOR (IF USED) |
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| GAS NOZZLE |
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3/64" Aluminum |
| 3/64" (1.2 mm) |
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(1.2 mm) |
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1.Remove the gas nozzle and nozzle insulator, if used, to locate the set screw in the gas diffuser which is used to hold the old liner in place. Loosen the set screw with a 5/64" (2.0 mm) Allen wrench.
2.Remove the gas diffuser from the gun tube.
3.Lay the gun and cable out straight on a flat surface. Loosen the set screw located in the brass connec- tor at the feeder end of the cable and pull the liner out of the cable.
4.Insert a new untrimmed liner into the connector end of the cable. Be sure the liner bushing is sten- cilled appropriately for the wire size bing used.
5.Fully seat the liner bushing into the connector. tighten the set screw on the brass cable connector. the gas diffuser, at this time, should not be installed onto the end of the gun tube.
6.With the gas diffusor still removed from the gun tube, be sure the cable is straight, and then trim the liner to the length shown in Figure D.1. Remove any burrs from the end of the liner.
GUN HANDLE
DISASSEMBLY
The internal parts of the gun handle may be inspected or serviced if necessary.
The gun handle consists of two halves that are held together with a collar on each end. To open up the handle, turn the collars approximately 60 degrees counterclockwise (the same direction as removing a right hand thread) until the collar reaches a stop. Then pull the collar off the gun handle. If the collars are diffi- cult to turn, position the gun handle against a corner, place a screwdriver against the tab on the collar and give the screwdriver a sharp blow to turn the collar past an internal locking rib.
Counterclockwise
PM 255
