TM 5-4520-253-13
REMOVE/lNSTALL VENTILATING AIR MOTOR (CONT)
INSTALLATION:
1.
2.
3.
4.
5.
6.
7.
8.
9.
If motor cushion
motor wires.
Install fan blades
(32) was removed, slide onto ventilating air motor (9) from end opposite
(31) and secure with set screws (30). Motor shaft (33) is Provided with recesses
which must be aligned with ends of set screws before tightening. When set screws are seated in
recesses, fan blades are in proper position on motor shaft.
Install capacitor (11) in mounting bracket (25) and tighten screw (26).
Loosely connect halves of motor mount (18) on one side using screw (27), lock washer (28),
and nut (29).
Place motor (9) in gripping portion of motor mount (18) with fan blades (31) facing down. Insert
screw (19) through one terminal of ground strap (22), hole in mounting bracket (25), and holes
in halves of motor mount (18). Complete attachment using lock washer (20) and nut (21).
Tighten screws (19 and 27) enough to hold motor (9). Secure opposite end of ground strap (22)
using lock washer (24) and nut (23).
Install assembled motor (9) and motor mount (18) using four screws (15), lock washers (16), and
flat washers (17). Do not tighten screws.
Ventilating air motor fan blades must be centered in flanged
opening in exchanger housing bottom panel.
With screws (15) loose, motor (9) can be adjusted horizontally. Adjust motor until fan blades are
centered in opening in exchanger housing bottom panel. Make adjustment by eye. Tighten four
screws (15).
Adjust motor (9) vertically in
motor mount (18) until one-
third of depth of fan blades (31)
projects below flange of opening
in exchanger housing bottom
panel. Make measurement by
eye, Tighten screws (19 and
27).
4-56
