Westerbeke BCGB Service Manual page 50

STARTER MOTOR
STARTER INSPECTION
Solenoid
Inspect the solenoid for continuity between terminals S and
M and between terminals S and body. No continuity should
be found between S an9 M. Continuity should be found
between S and the body and M and the body.
COmNUllY CHECK
Inspecting The Annature
1. Check the armature with a growler tester. If it's short
circuited. replace the armature. Also check for insulation
between the communicator and its shaft. If poorly
insulated, replace the armature.
ARMATURE'--H~
ARMATURE
CHECK
2. Measure the commutator 0.0. and the depth of undercut
Repair or replace it if the service limit is exce¢ed. Also
check the commutator outside surface for dirtiness and
roughness. If rough. polish the commutator with fine
crocus cloth.
, Brush and Brush Holder Inspection
1. Check the brushes. If worn out beyond the service limit,
replace the brushes.
Brush Height
, Standard 17 mm (0.669 in)
iiinit6 ,;;;"
(O.i36 in) ,
,---~""4~1
BRUSHES
2. Check the brush spring .tension. A weak or defective
spring will cause excessive brush wear; replace the springs
if suspect. .
BRUSH HOLDER
ASSEMBLY
~ QIo2'~_"""
3. Check for insulation between the positive brush holder
and holder base. If poorly insulated, replace the holder
assembly. Also check the brush holders for proper staking.
Commutar
O.D. Standard
Standard:
38.7 mm (1.523 in)
E'V>.~~,Service
limit:
-1.0 mm (-0.039
in)
COMMUTATOR 0.0.
j"""'WES7EllBEKE
I
Engines & Generators
43