4-28. PURGE INTAKE DOOR DAMPER MOTOR.
This task consists of:
General Mechanics Tool Kit, (Appendix B, Section III, Item 1)
General Safety Instructions
Before performing any maintenance actions on electrical equipment, ensure all
electrical power has been turned off. Failure to comply with this warning may
result in serious injury or death.
Procedures for removing and replacing the opposite purge intake door damper
motor are identical to those outlined in the preceding paragraphs.
Remove Intake Door Damper Motor. See Figure 4-18.
Open purge intake door.
Remove two nuts (1) and washers (2) and lift purge door limit switch (3) with mounting bracket (4) attached, clear of
Remove four screws (6), lockwashers (7), washers (8), screen (5), and filter (9). Discard lockwashers.
At 2 x 4 electrical junction box mounted on ECU plenum, remove two screws and cover. Tag and disconnect
three electrical leads from damper motor. Attach a line to electrical leads to facilitate pulling electrical leads through
conduit during installation.
Disconnect electrical conduit (10) from motor (11).
Remove 14 screws (12) and washers (13) from damper enclosure (14) flange and remove enclosure with damper
frame (15), damper (16) and motor (11). Carefully pull motor leads from electrical junction box and through
electrical conduit (10) until electrical leads are clear and attached line is visible. Disconnect line.
Remove two screws (17), washers (18), lockwashers (19) and nuts (20) attaching motor linkage (21) to damper
blade (22). Discard lockwashers.
Remove two screws (23), lockwashers (24), and washers (25) attaching motor (11) to mounting plate (26) and
remove motor with linkage (21). Discard lockwashers.
Remove linkage (21) and remove from motor (11).