TM 5-2420-230-24-2
B3.9 and B5.9 Series Engines
Bearings, Connecting Rod (001-005)
Section 1 - Cylinder Block - Group 01
Page 1-9
Use an outside diameter ball-tipped micrometer to mea-
sure the connecting rod bearing thickness.
Connecting Rod Bearing Dimensions
mm
in
Standard
1.955
MIN
0.0770
1.968
MAX
0.0775
0.25 mm Oversize
2.080
MIN
0.0819
2.093
MAX
0.0824
0.50 mm Oversize
2.205
MIN
0.0868
2.218
MAX
0.0873
0.75 mm Oversize
2.330
MIN
0.0917
2.343
MAX
0.0922
1.00 mm Oversize
2.455
MIN
0.0967
2.468
MAX
0.0972
NOTE: Connecting rod bearings are identified with the part
number and size stamped on the back.
Determine the size of the removed rod bearing, and obtain
a set of the same size.
NOTE: Oversize service rod bearings are available for use
with crankshafts that have been machined undersize.
Crankshafts that are machined undersize on the connect-
ing rod or main bearing journals are marked on the front
counterweight. If the crankshaft is marked, check the bear-
ing shell part number to make sure the correct bearing size
is used.
NOTE: Bearing shells are identified by steel-stamped char-
acters on the back of the bearings to indicate either stan-
dard (STD) or oversize (OS).
Install (001-005-026)
NOTE: Used bearings must be installed in the same lo-
cation from which they were removed.
Use clean lubricating engine oil to coat the inside diameter
of the bearing shell.
L-687
