Westerbeke BCGB Service Manual page 31

PISTONS AND CONNECTING RODS
Installing the Piston Assembly
Apply an ample amount of oil to the outside surfaces of the
piston and the piston rings. Position the piston rings and oil
ring (side rail spacer) end gaps as shown.
SIDE RAIL
~ ~
1
!/
~
FRONT
+
~
/)
iI2 SPACER
~
-:;::::>
""SIDE RAIL
Insert the piston and connecting rod assembly into the
cylinder, working from the arrow mark on the piston top
toward the camshaft spcocket side.
FRONT
ARROW
MARK
Securely pressing the piston ring with the ring band, insert
the piston and connecting rod assembly into the cylinder.
Keep in mind that the piston ring may be damaged if hit too
strongly.
PISTON RING
BAND INSTALLER
LUBRICATE WITH OIL
Crankshaft/Bearing Assembly
When the bearings are to be replaced, select the appropriate
bearings for assembly according to the identification marks
for the crankshaft and the connecting rod.
CRANKSHAFT
NO.3
NO.2
NO;1
r-----NO.1 ARM
CRANKSHAFT PIN DIAMETER
Identification marks
(1)
/1\
(2)
G
(3)
C
Journal Diameter
1.4171 - 1.4173in (35.995 - 36.000mm)
1.4167 - 1.4171 in (35.985 - 38.995mm)
1.4165 -1.4167in (35.980 - 35.985mm)
CONNECTING ROD BIG END INNER DIAMETER
Identification Marks
o
I
II
Big End Inner Diameter
1.5354 -1.5356in (39.000 - 39.005mm)
1.5356 -1.5360in (39.005 - 39.015mm)
1.5360 - 1.5362in (39.015 - 39.020mm)
CONNECTING ROD BEARING THICKNESS
Identification Color Bearing Thickness
Brown 0.0586 - 0.0588in (1.488 -1.493mm)
0.0588 - 0.0590in (1.493 -1.498mm)
Blue 0.0590 - 0.0592in (1.498 -1.503mm)
CONNECTING ROD BEARING SELECTION TABLE
Crankshaft Pin
Connecting Rod Bearing
Identification Marks Identification Marks
(1) //\
I Brown
n
Brown
m
(2)
G
I Brown
rr
lIT Blue
(3)
[ I
]I Blue
lIT Blue
0
IDENTIFICATION
COLOR
FRONT CAGE ~....., ,,_
IDENTIFICATION
MARK
CONNECTING ROD
STOPPER
NOTCH
Engines & Generators
24
CYLINDER
NUMBER