4-27. REMOVE/INSTALL VACUUM-AIR PRESSURE SYSTEM
This task covers:
General Mechanics Tool Kit, Appendix B, Item 1
Teflon Tape, Appendix E, Item 46
General Safety Instructions
Before performing any maintenance actions on electrical equipment,
ensure all electrical power has been turned off. Death or serious
injury may occur from failure to do this.
Turn off electrical power. See figure 4-19.
Turn off vacuum-air pressure pump motor by pressing switch mounted on wall above
Unplug pump unit power cord from wall receptacle located in storage cabinet No. 4.
Open draincock on air surge tank and bleed air pressure from system.
Remove air surge tank. See figure 4-19.
Turn off vacuum-air pressure pump motor at switch mounted on wall above sink.
Unplug power cord from receptacle in cabinet No. 4.
Loosen three hose clamp screws on tees located on side and bottom of tank and
disconnect hoses and clamps.
Remove air surge tank strap mounting screw.
Remove two mounting screws, flat washers, lockwashers and nuts from air surge tank.
Remove tank from storage cabinet and place on working surface.
Remove T fittings, air surge tank strap and hose connections from side and bottom of
air surge tank.
Remove relief valve.
Remove drain cock from "T fitting.