Disassembly of End Bell and Brush Holder Plate

screw. Remove short screw (28) and washer (32)

(87). Remove nut and guide and pull plunger and

from each brish hlder and remove two grounded

a t t a c h e d parts from lever housing.

b r u s h holders, spacer plates (31) and non-metallic

(11) Using retaining ring pliers, remove

plates (30).

retaining ring (80), retainer (79), lever spring (78).

(8) Separate plate assembly (33), insulation

retainer ring (77), bellows (76) and flat washer

plate (34), and support plate (35).

(75) from plunger (74).

Cleaning.

(12) Remove retaining ring (80) and remove

( 1 ) Clean all metal nonelectrical parts in an

l e v e r shaft (89) and lever (90). Remove seals (88)

approved cleaning solvent and dry with compressed

and (91) from shaft.

air.

( 1 3 ) Disassemble lever housing only if parts

( 2 ) Clean field coils thoroughly with a clean

require replacement. Remove oil seal and press out

c l o t h dampened with an approved cleaning solvent.

sleeve bearing in lever housing. R e m o v e p i p e p l u g

careful

not

damage

protective

insulation

(85) and wick (86).

coating. Dry thoroughly with compressed air.

(14) Remove hex nut and lockwasher

(3)

Remove

loose

particles

from

armature

s e c u r i n g connector to solenoid switch (72). Remove

w i t h compressed air and wipe with a clean cloth

f o u r assembled washer screws ( 7 3 ) securing relay

dampened in an approved cleaning solvent. Clean

t o frame and slide relay out of connector.

commutator lightly with No. 00 sandpaper and

(15)

Remove

hex

nut

(1),

lockwasher

(2).

remove all traces of dust with low-pressure com-

connector (3), hex nut (1), flat washer (4), two non-

pressed air.

metallic washers (5) and bushing (6).

(4) Clean solenoid relay, insulation plates.

( 1 6 ) Do not remove field coil assembly unless

a nd n o n - m e t a l l i c w a s h e r s w i t h a c l e a n cloth

inspection indicates coils are defective. Remove two

d a m p e n e d with an approved cleaning S o l v e n t a n d

pole shoes screws (14) from each of the six pole

dry with corn pressed air.

shoes (11). Remove field coil assembly (9), ter-

(5) Clean brushes with a dry, clean cloth only.

m i n a l screw and bushing. Unsolder terminal screw

D o not permit solvent to contact brushes.

from coil assembly.

f. lnspection and Repair.

(17)

Remove

commutator

end

insulator

and

(1) I n s p e c t h o u s i n g s a n d f r a m e s f o r c r a c k s

t w o insulators from drive end of frame.

a n d distribution. Inspect threads in tapped holes

d. Disassembly of End Bell and Brush Holder

for damage. Replace defective parts.

Plate.

( 2 ) Inspect sleeve bearings for wear, gouges,

(1)

Remove

nuts

(30)

and

(1),

and

lock-

and grooves. Replace bearing if defective. Check

washers (2), flat washer (4) and insulator (38)

f o r looseness in housing or end bell. Replace worn

from terminal stud. Remove three roundhead

or defective bearings, If new bearing is loose in

screws (21), lockwashers (20), and flat washers

b o r e . replace housing or end hell.

(19)

and

pull

plate

assembly

(18)

from

com-

( 3 ) Inspect wicks for tests, fraying, or wear.

mutator frame assembly (45).

Replace

wick

defective.

(2) Remove bushing (41), seal (42) and two

(4) Inspect armature for gounds with a test

flat washers (49) from terminal stud.

l i g h t by touching one probe to armature core and

(3) Disassemble end bell assembly only if

other to commutator risers. If test light glows, the

p a r t s require replacement. Remove pipe plug (46)

a r m a t u r e is grounded and must be replaced.

and wick (47), from end frame and bearing

(5) Inspect armature for short circuits using a

assembly.

growler fixture and a steel strip. Strip will vibrate

(4) If sleeve bearing (44) is worn, remove

against armature over a shorted area as the ar-

e x p a n s i o n plug (43) and press sleeve bearing from

mature is turned. Replace armature if a short

end frame.

circuit is found.

( 5 ) Remove screws (15) and lockwashers (16)

( 6 ) Turn down commutator if grooved or out

securing brush leads to brush holders. Lift each

of round. Undercut mica to a depth of 0.025 to

spring in turn and remove eight brushes (17).

0.032 inch below surface of commutator. Do not

(6) Remove, long brush holder bolt (27) and

w i d e n slots when undercutting mica.

l o c k washer (25) from each of two insulated brush

(7) Check field winding in frame for in-

holders (23). Remove two springs (24) from each

s u l a t i o n breakdown with an ohmmeter. Attach one

screw. Remove short screw (26) and lockwasher

probe of ohmmeter to frame and other to one of the

(25) from each insulated brush holder. Remove two

f i e l d winding terminals. The reading should not be

brush holders and spacer plates (22).

l e s s than one megohm. Replace defective coil.

( 7 ) Remove long brush holder screw (29) and

l o c k w a s h e r (32) from each of two grounded brush

worn teeth. Inspect clutch splines for wear and

holders (23). Remove two springs (24) from each

5-48