Westerbeke 6.5 MCG Service Manual page 26

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.
SIDERAIL
~
/1
FRONT+
~
/)
12 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 spx;ocket 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.
WBRICATE 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
N0.3
N0.2
I----
N0.-1
CRANKSHAFT PIN DIAMETER
Identification marks
(1) //\
(2)
8
(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
0
I
II
Big End Inner Diameter
1.5354 ·1.5356in (39.000 • 39.005mm)
1.5356 ·1.53601n (39.005 • 39.015mm)
1.5360
·1.53~21n
{39.015 • 39.020mm)
CONNECTING ROD BEARING THICKNESS
Identification Color
Brown
Blue
Bearing Thickness
0.0586 • 0.0588in (1.488 ·1.493mm)
0.0588- 0.0590in (1.493 ·1.498mm)
0.0590- 0.05921o (1.498 -1.503mm)
CONNECTING ROD BEARING SELECTION TABLE
Crankshaft Pin
Identification Marks
IDENTIFICATIO
MARK
(1) //\
(2)
8
(3)
[
CONNEGnNG ROD
Connecting Rod Bearing
ldentlfacatlon Marks
I
n
m
I
li
m
I
1I
m
STOPPER'
NOTCH
Brown
Brown
Brown
Blue
Blue
Blue
IDENTIRCATION
COLOR
Engines & Generators
24
CYLINDER
NUMBER