5400 CO2 Purge Solenoid Cleaning

Purpose: Remove and clean the CO2 Purge solenoid according to the following steps.

Required Equipment: Open end wrench set

Screwdriver set

Adjustable wrench

Reference: SOPMAN

1. Shut the machine down but do not turn it off.

2. Turn off the vacuum pump.

3. Pull out the bulkhead

4. Find the valve manifold. It is on the left side of the bulkhead in the middle. It has seven solenoids on it with two tubes coming from the front and two on the left side.

5. The purge solenoid is on the top left of the solenoid manifold and says, "Purge".

6. Remove the top left and bottom right corner screws.

7. When these are removed you should be able to remove the solenoid. (DO NOT try and disconnect the wiring.) Make sure not to lose the two O-rings between the manifold and the solenoid.

8. Take the other two screws off of the solenoid.

9. When pulling the gold base away from the black piece (the solenoid), be very careful not to lose the slide or the spring behind it.

10. Clean all pieces with isopropyl alcohol (rubbing alcohol). Make sure you take out the Allen screw out of the gold base and clean it.

11. When finished reassemble.

12. Turn on the vacuum pump.

13. Perform an analysis loop leak test.

14. Put the 5400 back into Run mode.