1
Woodruff key
22
Brush
2
Armature
23
Lockwasher
3
Field coil
24
Screw
4
Field coil
25
Brush arm spacer
5
Pole shoe
26
Brush arm
6
Field frame
27
Brush spring
7
Lockwasher
28
Screw
8
Screw
29
Lockwasher
9
Terminal stud
30
Inner bearing retainer plate
10
Stud bushing
31
Drive-end bearing
11
Washer
32
Outer bearing retainer plate
12
Lockwasher
33
Drive-end frame
13
Nut, hex, No. 12-24 (4 req)
34
Spacing collar
14
Band cover
35
Fan
15
Pole shoe screw
36
Pulley
16
Cover plate screw
37
Washer
17
Lockwasher
38
Shaft nut
18
End cover plate
39
Through-bolt
19
Cover plate gasket
40
Washer
20
Commutator-end bearing
41
Lockwasher
21
Commutator-end frame
42
Screw
Figure 78. -Continued.
removing the screws (24) and lockwashers (23). Detach the commutator-end frame by removing the two through-bolts
(39) and washers (40). Tap with a soft hammer to loosen, if necessary. Detach the field frame (6), using a soft hammer, if
necessary. Separate the armature (2) and drive-end frame (33) by placing the armature in soft jaws of a vise. Take off
the shaft nut (38) and washer (37). Remove the pulley (36) with a gear and bearing puller (par. 179) and slide off the
drive-end frame. Remove the woodruff key (1). Remove the screws (42) and lockwashers (41), and separate the fan (35)
from the pulley. Remove the spacing collar (34). Take out the three screws (28) and lockwashers (29), and remove the
inner bearing retainer plate (30). Press out the drive-end bearing (31) with the outer bearing retainer plate (32). Use an
arbor press (par. 179) for this purpose supporting the inner bearing race where possible. The field frame, including
lockwasher (7), screw (8), terminal stud and lead (9), stud bushing (10), washer (11), lockwashers (12), the lower hex nut
(13), pole shoe screws (15), pole shoes (5), and the field coils (3 and 4), cannot be disassembled. The field coils are
varnished and baked in place and are not serviced separately. If the coils are defective, replace the complete frame and
field assembly. Lift the ends of the brush springs (27) over the stops. The brush arms (26), brush springs, and brush arm
spacers (25) will slide off the pins. Lift out the brushes (22). Remove the cover plate screws (16) and lockwashers (17),
and
183
