Westerbeke 8.0KW-60Hz Service Manual page 50

STARTER MOTOR
STARTER INSPECTION
Solenoid
Inspect the solenoid for continuity between terminals S and
M 'l'ld-between terminals S and body. No continuity should
qe found between S and M: Continuity should be found '
between S and the body and M and the 'body.
CONTINUITY CHECK
Inspecting The Armature
1. 'Check the armature with a growler tester. If it is short
circuited, replace the armature. Also check for insulation
between the commutator and its shaft. If poorly
insulated, replace the armature.
, ARMATURE
CHECK
2. Measure the commutator O.D. and the depth of undercut.
Repair or replace it if the service limit is exceeded. Also,
check the commutator outside surface for dirtiness and
roughness. If rough, polish the commutator with fine
crocus cloth.
COMMUTATOR 0.0.
COMMUTATOR OUTSIDE DIAMETER
STANDARD 1.26 In (32 mm)
, LIMIT 1.22 In (31 mm)
,CI •• eIJSeLOTH
Brush and Brush Holder
Insl~ec
1. Check the brushes. If worn out beyond the service lirui~
replace the brushes. ' ,
,BRUSH
i
--~I:RVICt
LIMIT
2. Check the brush spring tension. A weak or defective
spring will cause.excessive brush wear; replace the
springs if suspect. ' "','"
' I , ' " "
aRUSH fiEIGHt' ' ,,'", ",;
STANDARD 6.6 Ibl (3.0 kgl)
LIMIT 4,0 Ibl (l.B kgl)
SRUSH HOLDER
3. Check for insulation between the positive brush holder
and holder base. If piiorly insulllted, replace the holder
assembly, Also check the brush holders for proper staking.
Engines & Generators
44