4-118. AIR CONDITIONER REPLACEMENT (M373A2D).
This Task Covers:
Z 110-volt power disconnected from semitrailer.
Air conditioner cable assembly removed
Z Twenty-one rivets
Personnel Required: Two
General mechanic's tool kit
ZDrili bit set
Z Rivet gun
Open semitrailer front door and latch in place.
Loosen three hose clamps (8) and disconnect three condensate hoses (9).
Remove four screws (5), lockwashers (6), and flatwashers (7) securing air conditioner (4) to semitrailer floor,
Remove four nuts (11 ), lockwashers (12), and flatwashers (13) securing each angle bracket (3) to alinement
plate (2) in semitrailer ceiling. Discard Iockwashers.
Remove screw (17), Iockwasher (1 6), and flatwasher (15) from side of each angle bracket (3) and remove bolt
slide locks (14). Discard lockwashers.
Raise air conditioner (4) to clear drain coupling in floor at front of unit. Slide air conditioner forward out of door
opening, being careful to support it.
Use a fork lift and lift air conditioner (4) from semitrailer.
Remove 21 rivets (1) and alinement plate (2) from semitrailer ceiling. Discard rivets.
install alinement plate (2) in semitrailer ceiling using 21 new rivets (l).
Using a fork lift, carefully pi ace air conditioner (4) in semitrailer. There is about 3/4 in. (1.9 cm) clearance between
top of air conditioner and bottom of alinement plate (2).
Position air conditioner (4) on mounting channels (10).
Secure air conditioner (4) to floor with four screws (5), new Iockwashers (6), and flatwashers (7).
Place angle bracket (3) on each side of air conditioner (4). install each bolts slide lock (14) using screw (1 7), new
Iockwasher (16), and flatwasher (15). Tighten screws fingertight.