Westerbeke 5.0KW BCG-60Hz Service Manual page 74

TESTING THE BC ROTOR COLISEUM MODEL
COLISEUM MODEL
"COVER PLATE SCREWS
.~
COVER
PULLING
BOLTS
~
DIODE
POWER
ID
REMOVE THE COVER PLATE
1.
Remove the four cover plate screws.
TESTING FOR A WINDING SHORTED '
DCV~.A
TO GROUND
If
ACV~+t
f
IDA COM y.n.A
2. Insert two 8mm x 35mm-1.25 pitch bolts into the two left
and right vacant holes as shown.
CONTINUITY TEST
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3. Tighten these two bolts in sequence. This will pull the
cover plate off the generator, exposing the rotor assembly
with the bearing in place.
With the diode still removed from the isolated plate, test the
continuity between the winding/diode connection and the
4. When re-installing, place a small amount of petroleum
jelly on the rotor bearing "0" ring located in the cover
boss.
Position the cover onto the bearing and thread the allen
head screws back into place finger tight).
Tighten the screws in a cris-cross manner drawing the
end cover onto the bearing. When fully on, tighten the
screws securely.
Use a thin walled, deep well 7/16" (llmm) socket and . e
remove the diodes from the isolated plate. With the
winding~
generator case.
TESTING THE ROTOR FIELD WINDINGS
k
connection still attached to the diode test between the con- "-..
nection and'the metal of the rotor shaft as shown above,
I
~-
.........
check both sides.
I".. ..
"
GENERATOR
CASE /
II
I
ROTOR WINDING RESISTANCE
5.0 KW 3.9 TO 4.0 OHM
7.0 KW 2.1 TO 2,2 OHM
RW
TESTING ROTATING FIELD
FOR SHORT TO GROUND
POWER
mJ~IOA
mA
DCV.
'~.
. '
ACV
*
~
,]I--__
H--...I
02
TESTING THE DIODES
Refer to the following pages.
Engines & Generators
66