a. Seal the inlet fitting with one finger.

b. Squeeze the aspirator bulb and immediately seal thebulb outlet with a finger of the other hand.

c. If the bulb inflates, check the filament gaskets andre-tighten the filaments.

d. Perform the "Flow Rate Checks" procedure.

20. Using the two screws, secure the white and orange wire lugsto the white base.

21. Mount the battery holder on the posts and secure it with fourscrews and lock washers.

22. Place the bottom section of the case on the instrument so itsthumbscrews (FIGURE 3-2) are positioned away from theinlet and outlet fittings.

Figure 3-4. Flashback Arrester Locations

Chapter 3, Maintenance

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