–10–
E
INSPECTION AND REPAIR
ENG
5. Select:
S
Main journal bearing (J
1
J
4
)
S
Crank pin bearing (P
1
P
2
)
Selection of bearings:
Example 1: Main journal bearing
F
If “J
1
” on the crankcase is “6” and “1” on the
crankweb, then the bearing size for “J
1
” is:
Bearing size of J
1
:
Crankcase J
1
– Crankweb J
1
=
6 – 1 = 5 (Yellow)
BEARING COLOR CODE
1
Blue
2
Black
3
Brown
4
Green
5
Yellow
6
Pink
7
Red
Example 2: Crank pin bearing
F
If “P
1
” on the connecting rod is “4” and “2” on
the crankweb, then the bearing size for “P
1
”
is:
Bearing size of P
1
:
Connecting rod P
1
– Crankweb P
1
=
4 – 2 = 2 (Black)
BEARING COLOR CODE
1
Blue
2
Black
3
Brown
4
Green
5
Yellow
6
Pink