4-29. ENVIRONMENTAL CONTROL UNIT INTAKE DAMPER/MOTOR.
This task consists of:
General Mechanics Tool Kit, (Appendix B, Section III, Item 1)
Electrical Wire Splice (3)
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 any of the ECU intake dampers and motors
are identical to those outlined in the following paragraph.
Remove ECU Intake Damper Motor. See Figure 4-19.
Loosen eight captive screws (1) and remove screen (2) and filter (3) from ECU intake.
Remove two screws (4) and cover (5) from electrical junction box (6) located on plenum (7). Tag and disconnect
motor leads. Attach line to leads to facilitate installation.
From plenum, remove eight screws (8), lockwashers (9), 16 washers (10), and eight nuts (11) that fasten damper
enclosure (12) to plenum (7). Discard lockwashers.
From electrical junction box (6), remove lock nut (13) from conduit (14) and carefully remove damper enclosure
(12) and motor (15) from plenum (7).
Loosen conduit nut and remove conduit (14) from motor (15). Disconnect line attached to motor leads.
Remove two screws (16), washers (17), lockwasher (18), and nuts (19) that attach motor linkage (20) to damper
blade (21). Discard lockwashers.
Remove two screws (22), lockwashers (23), washers (24) and separate motor (15) with linkage (20) from damper
motor mounting plate (25). Discard lockwashers.
Detach linkage (20) from motor (15).
Install ECU Intake Damper Motor. See Figure 4-19.
Attach linkage (20) to motor (15) and fasten motor in place on damper mounting plate (25) with two screws (22),
lockwashers (23), and washers (24).