Bearing Selection - TOHATSU BFT115A Service Manual

BEARING SELECTION

CONNECTING ROD BEARING
• When replacing the connecting rod bearing, check
the crank pin code letter and the connecting rod
code number, and select the correct bearing by
referring to the bearing selection table.
• If the code letters and/or numbers are not clear,
clean the areas with a cleaning solvent and check
again. Do not scrub with a stiff wire brush or scraper
to clean.
Check the connecting rod code numbers (1) and record
them.
• The connecting rod code numbers are for the No.1
and the subsequent number journals when viewed
from the cam chain side.
Connecting rod: 51.00 mm (2.008 in)
Code
number
1 or I
2 or II
3 or III
4 or IIII
Check the crank pin code letters and record them.
• The crank pin code letters are for the No.1 and the
subsequent number journals when viewed from
crankshaft pulley side.
Crank pin: 48.00 mm (1.8898 in)
Code
number
A
B
C
D
Tolerance ranges
±0.000 – +0.006 mm (±0.0000 – +0.0002 in)
+0.006 – +0.012 mm (+0.0002 – +0.0005 in)
+0.012 – +0.018 mm (+0.0005 – +0.0007 in)
+0.018 – +0.024 mm (+0.0007 – +0.0009 in)
Tolerance ranges
±0.000 – -0.006 mm (±0.0000 – -0.0002 in)
-0.006 – -0.012 mm (-0.0002 – -0.0005 in)
-0.012 – -0.018 mm (-0.0005 – -0.0007 in)
-0.018 – -0.024 mm (-0.0007 – -0.0009 in)
CYLINDER BLOCK
(1)
CRANK PIN CODE LOCATION:
No.1 No.2
No.3
No.4
CONNECTING
ROD
JOURNAL
(FLYWHEEL
SIDE)
No.3 No.4
No.2
No.1
CONNECTING
ROD
JOURNAL
(CAM CHAIN
SIDE)
15-43