Thermadyne CE CutMaster 75, Service Manual

Page: 41 / 80

Manual 0-2869 5-9 SERVICE
E. Input Power Cable Replacement
1. Remove the cover per subsection 5.04-A.
2. Locate and label the input power cable connec-
tions and disconnect the cable.
3. Unthread the retaining nut on the Input Cable
Strain Relief on the inside of the Rear Panel and
remove the Input Power Cable from the unit.
4. Install the replacement Input Power Cable by re-
versing the above steps. The Input Power Cable
ground wire requires a ring terminal.
F. Rear Panel Replacement
WARNING
Disconnect primary input power and the gas sup-
ply at the source and bleed down the system before
performing this procedure.
1. Remove the cover per subsection 5.04-A.
2. Remove the primary input power cable per sec-
tion 5.07-C.
3. CE Units only: Detach the ground cable, if in-
stalled, from the grounding stud on the Rear Panel.
Transfer the grounding stud and additional hard-
ware from the original panel to the replacement.
4. Remove the Regulator/Filter Assembly per sec-
tion 5.07-A.
5. Remove two bolts at the bottom corners of the Rear
Panel.
6. Remove one nut on a stud on the inside of the Rear
Panel, at the rear edge of the center chassis.
7. Replace the Rear Panel by reversing the above
steps.
8. If not already done, attach the data tag(s), provided
with the replacement Rear Panel. Position these
as on the original Rear Panel.
5.08 Right Side Internal Component
Parts Replacement
Refer to Section 6.07 Right Side Internal Component Parts
List and overall detailed drawing.
WARNING
Disconnect primary power from the source before
opening or disassembling the power supply.
A. Pressure Switch/Solenoid Assembly
Replacement
The Pressure Switch and Solenoid Valve are one Assembly.
Disconnect primary input power and bleed down the sys-
tem.
1. Remove the cover per subsection 5.04-A.
2. Disconnect the following wires:
a. Wires #10 and #11 from the Pressure Switch
Assembly.
b. Wires #8 and #9 from the Solenoid Assembly.
3. Push the clip on the front of the Heatsink Shroud
to the left to release the Solenoid Assembly. Dis-
lodge the Solenoid from underneath the clip on
the top of the Heatsink Shroud.
Dislodge Solenoid
Assembly
Push Clip
to the left to
release Solenoid
Assembly
A-02854
4. Release the hose from the Adapter Fitting on the
input side of the Solenoid Assembly. Hold a
wrench or similar tool against the locking ring on
the Fitting, then pull on the hose to release it.
5. Release the hose from the Adapter Fitting on the
output side of the Pressure Switch.