Firepower, a Thermadyne Company FIREPOWER FP-82 - Manual (Page 41)

Manual 0-2871 5-9 REPAIRS & REPLACEMENT PROCEDURES
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.
6. Install the replacement Pressure Switch/Solenoid
Assembly by reversing steps 2-5. Once installed,
the Solenoid Assembly should fit securely on the
Heatsink Shroud. It should not be moveable.
7. Re-install the power supply cover.
B. CD PC Board Assembly Replacement
Follow the antistatic procedures in subsection 5.02.
1. Remove the cover per subsection 5.04-A.
2. Label, then disconnect the wiring connections to
the CD PC Board Assembly.
3. Remove the bolt securing the PC Board to the
standoffs.
4. Slide the PC Board upward to release it from its
bottom supports.
5. Install the replacement CD PC Board Assembly by
reversing the above steps.
C. Fan Replacement (M1, M2)
1. Remove the cover per subsection 5.04-A.
2. Label, then carefully remove the wiring connec-
tors from the terminals on the Fans.
3. Disconnect the Work Cable from terminal E61 on
the Power Output Board.
4. Remove one bolt from the Front Panel of the Power
Supply, near the Control Panel. Pull the Front
Panel slightly away from the Power Supply.
5. Remove one nut from a stud at the bottom of the
Fan Shroud.
6. Lift the Fan Shroud and pull it out of the Power
Supply.
7. Remove two bolts per Fan. Set the Fan(s) aside.
8. Install the replacement Fan Assembly as follows:
a. Fasten Fan(s) in position with the wiring con-
nectors at the bottom of the Fan(s).
NOTE
Only two screws are needed to attach the Fan to
the Fan Shroud. They can be installed in any two
holes provided they are opposite each other. For
grounding purposes, one of those screws must be
installed with a star washer.
b. Place the Fan Shroud in position in the Power
Supply.