TM 9-4120-411-14
(24) Support power box assembly then remove eight nuts (52), lock washers (53), flat washers (54), screws
(55), flat washers (56), and power box assembly. Discard lock washers. Close power box assembly cover
(4) and turn three latches (3) to secure.
(1) Turn to release three latches (3) and open power box assembly cover (4). Pull bracket (57) out from unit
then carefully place power box assembly on bracket and align mounting holes. Support power box
assembly then install eight flat washers (56), screws (55), flat washers (54), lock washers (53), and nuts
(52) to secure.
(2) Connect power box assembly ground strap (51) to frame with flat washer (50), new lock washer (49), and
screw (48).
(3) Insert the three cables that go to reversing valve (44) (L1), (FDECU-2 ONLY) crankcase heater (45) (HR1),
and compressor high temperature cutout (47) (S6). Connect wire leads from cables going to reversing
valve (L1) and crankcase heater (HR1) with five crimp nuts (46) per paragraph 4.16 using tags and wiring
(4) Remove locking nut (40). With sealing washer (43) in place, install cable (41) with strain relief fitting (42)
into compressor and secure with locking nut.
(5) Install three wire leads onto compressor input power terminals using tags and wiring diagram figure 4-14.
Secure using three flat washers (39), new lock washers (38) and screws (37). Remove tags.
(6) Install two wire leads onto compressor high temperature cutout (S6) using tags and wiring diagram
(7) Place wire leads onto compressor ground stud using tags and wiring diagram figure 4-14. Secure using flat
washer (36), new lock washer (35) and nut (34). Remove tags.
(8) Remove locking nut (30). With sealing washer (33) in place, install cable (31) with strain relief fitting (32)
into inside blower motor and secure with locking nut.
(9) Connect the ground wire lead at the insid e blower motor connections point using flat washer (29), lock
washer (28), and screw (27). Connect the remaining wire leads with three crimp nuts (26) per
(10) Install new cap (19) onto outside blower motor cable lead contacts (20) using wiring diagram figure 4-14.
(11) Install flat washer (25), ground lead (24), flat washer (23), new lock washer (22), and nut (21).
(12) Connect cap (19) with contacts (20) using tags and wiring diagram figure 4-14. Remove tag.
(13) Secure outside blower motor cable with three tiedown straps (18). Cut to remove excess tiedown strap
material.
(14) Loosen compression nuts (16) then slide strain relief fittings (14) off cables (13). Feed cables through
lanyard (17) then slide strain relief fittings onto cables far enough to leave one inch of the cables extending
from the strain relief fittings and tighten compression nuts.
(15) Remove locking nuts (12). With sealing washers (15) in place, install cables (13) with strain relief fittings
(14) into volute assembly (58) and secure with locking nut.
(16) Install two new caps (10) onto heater cable lead contacts (11) using tags and wiring diagram figure 4-14.
Remove tags.
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