REPLACEMENT PROCEDURES 5-8 Manual 0-2957
5.08 Right Side Internal 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 Assembly from underneath the clip on
the top of the Heatsink Shroud.
Heatsink
Shroud
Dislodge Solenoid
Assembly
Push Clip
to the left to
release Solenoid
Assembly
Art # A-03705
2
3
1
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 Solenoid Assembly.
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. Pilot PC Board Assembly Replacement
Follow the antistatic procedures in subsection 5.02.
1. Remove the power supply cover per subsection
5.04-A.
2. Label, then disconnect the wiring connections to
the Pilot PC Board Assembly.
a. J28 Connector
b. Wire connectors to terminals E58 and E62.
3. Remove the bolts securing the PC Board to the
standoffs.
4. Slide the PC Board upward to release it from its
bottom supports.
5. Install the replacement Pilot PC Board Assembly
by reversing the above steps.
6. Reinstall the Power Supply cover.
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 Sup-
ply.
5. Remove one nut from a stud at the bottom of the
Fan Assembly Panel.
6. Lift the Fan Assembly Panel and pull it out of the
Power Supply.
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