3-10. AIR FILTER MAINTENANCE.
This task covers:
Tool Kit, General Mechanics
Cleaning Solvent (Item 11, Appendix E)
Cleaning solvent, Federal Specification P-D-680, is toxic and flammable. Use only in a well-
ventilated area. Avoid prolonged breathing of fumes. Keep solvent away from flames. Do not
use in excessive amounts. Avoid skin contact.
Heater unit shut down and cool.
Power cable disconnected from power source.
Using a common screwdriver loosen seven quarter-turn fasteners (5).
Remove access door (4).
Lift up air filter (1) and pull out from bottom to remove filter from lower track (3).
Lower air filter (1) in front of lower track (3) and top of filter is out of upper track.
Lift filter (1) out of heater unit.
Repeat steps (3 through 5) for other filter (2).