Thermadyne CE CutMaster 75, Service Manual

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Manual 0-2869 5-7 SERVICE
F. EMI Filter Replacement (CE Units only)
1. Label the input power cable connections and the
cable connections to the main input contactor.
2. Disconnect all wire and cable connections to the
EMI Filter.
3. Remove the hardware securing the EMI Filter. This
hardware passes upward through the base of the
power supply.
4. Put the replacement EMI Filter in position and se-
cure it with the hardware removed in Step 3.
5. Connect the input power cables and the cable con-
nections to the main input contactor.
6. Reinstall the Power Supply cover.
7. Test the Power Supply for proper operation.
5.07 Rear Panel Parts Replacement
Refer to subsection 6.02 for parts list and overall detailed
drawing.
WARNING
Disconnect primary power from the source before
opening or disassembling the power supply.
A. Filter/Regulator Assembly Replacement
WARNING
Disconnect the gas supply at the source and bleed
down the system before attempting this procedure.
1. Disconnect the gas input hose from the Filter/
Regulator Assembly on the Rear Panel of the unit.
2. Remove the four bolts securing the Regulator
Mounting Bracket to the Rear Panel.
3. Disconnect the black gas tube from the Filter/
Regulator Assembly Adapter Fitting. Hold a
wrench or similar tool against the
locking ring on
the Fitting and pull on the tube to release it.
4. Remove the nut securing the Filter/Regulator As-
sembly to the Regulator Mounting Bracket. Re-
move the Filter-Regulator Assembly from the
Mounting Bracket.
5. Install the replacement Filter/Regulator Assem-
bly by reversing the steps above. When connect-
ing the gas tube to the Adapter Fitting, simply in-
sert the hose into the fitting until fully seated. It
will automatically lock.
B. Standard Filter Element Replacement
WARNING
Disconnect the gas supply at the source and bleed
down the system before attempting this procedure.
1. Remove power from the power supply; turn off
the gas supply and bleed down the system.
2. Unscrew the bowl on the bottom of the Regula-
tor/Filter Assembly. The filter element will be
visible and still attached to the main body of the
Regulator/Filter Assembly.
3. Grasp the filter element and unscrew it from the
Regulator/Filter body. The filter element will
come off with a spool and some additional pieces.
4. Note the correct assembly of the filter/spool then
remove the filter from the spool. Either clean or
replace the filter element.
5. The filter element and spool, with the baffle ring
in place (teeth facing downward) can be screwed
back into the Regulator body by compressing the
spring on the spool. Tighten firmly by hand.
6. Reinstall the bowl.
7. Turn on the air supply.
Art # A-02995
Regulator/Filter
Assembly
Spool
Bowl
Spring
Filter
Element
No. 9-4414
Baffle
Ring