6-55 POWER UNIT
SELECTION OF MAIN BEARING
Whenever a bearing requires replacement, select a new bear-
ing according to following procedure.
(1) First check journal diameter.
As shown in figure, upper (flywheel side) crank web of No.1
cylinder has four (4) stamped code numerals.
The numerals (1 , 2 & 3) represent the journal diameters
shown below.
(2) Next, check bearing holder inside diameter without bear-
ing.
As shown in figure, the STBD side of cylinder block has four
(4) stamped codes letters.
The letters (A, B & C) represent the bearing holder inside
diameters shown below.
Numeral stamped Journal diameter
1
44.994 – 45.000 mm
(1.7714 – 1.7717 in.)
2
44.988 – 44.994 mm
(1.7712 – 1.7714 in.)
3
44.982 – 44.988 mm
(1.7709 – 1.7712 in.)
Code
Crank bearing holder inside
diameter ( w / o bearing )
A
49.000 – 49.006 mm
(1.9291 – 1.9294 in.)
B
49.006 – 49.012 mm
(1.9294 – 1.9296 in.)
C
49.012 – 49.018 mm
(1.9296 – 1.9298 in.)
Flywheel
side
No.2 Journal code
No.1 Journal code
No.3 Journal code
No.4 Journal code
Flywheel
side
No.1 Holder code
No.2 Holder code
No.3 Holder code
No.4 Holder code
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