TM 5-4310-371-14
4-7. MOTOR REPLACEMENT.
WARNING
Disconnect compressor unit from main power supply before servicing, replacing
or repairing parts of equipment, to avoid personal injury.
a.Remove belt guard front and V belts as described in paragraph 4-4.
b. Remove motor cable by removi ng junction box cover. Untap and remove screws and nuts from wire lugs as
shown in figure 4-3. This step must be performed by a qualified electrician.
c. Remove motor pulley and motor pulley key from motor shaft by turning motor pulley set screw counter clockwise
as shown in figure 4-4.
d. Remove motor mounting nuts, lockwashers, and bolts as shown in figure 4-4.
e. Lift motor from air receiver mounting bracket. (Figure 4-4)
f. Install motor on to air receiver mounting bracket. (Figure 4-4)
g. Install motor mounting bolts, lockwashers and nuts, figure 4-4, but do not tighten.
h. Install motor pulley and motor pulley key on to motor shaft (figure 4-4) and tighten with set screw. Be sure motor
pulley is aligned with flywheel to avoid excessive V belt wear or breakage.
j. Install motor cable by connecting wire lugs with screws and nuts together and tapping same as shown in figure
k. Install V belts and belt guard as described in paragraph 4-3.
4-8. PRESSURE SWITCH ADJUSTMENT.
WARNING
Use extreme caution during the following procedures as pressure switch carries
electrical charge which will cause personal injury.
WARNING
Use extreme caution during the following procedures, as adjusting of pressure
switch will cause unit to start up to pressurize air receiver.
4-10
