SERVICE
DATA
/
STANDARDS
AND
LIMITS
•
BCGB
ENGINE/GENERATOR
Component
Specified
Value
I
Standard
Repair
Limit
Component
Specified
Value
I
Standard
Repair
limit
inches(mm)
inches(mm)
inches(mm)
inches(mm)
PISTON
AND
CONNECTING
ROD
CRANKSHAFT,
BEARING
Piston
Pin
Press-in
temperature
Crankshaft
End
Play
..........
0.0020
-
0.0098
(0.05
-
0.25)
.................
.
·
........................................
ordinary
temperature
Connecting
Rod
Center
length
·
.............................
.4.0138
4.0178
(101.95
-
102.05)
Crankshaft
Journal
O.D
...
1.5740
-1.5748
(39.98
-
40.0)
Crankshaft
Pin
0.D
.........
1.4165
-1.4173
(35.98
-
36.00)
Parallelism
between
Big
End
and
Small
End
Cylindericity
of
Journal
and
Pin
·
...............................................
0.004
(0.05)
·
....................................
Less
than
0.0002
(0.005)
Connecting
Rod
Twist...
...................
O.OO4
(0.1)
Concentricity
of
Journal
and
Pin
Connecting
Rod
Big
End
to
Crankshaft
Side
Clearance
·
....................................
Less
than
0.0006
(0.015)
..................................
0.0039
-
0.0098
(0.10
-
0.25)
..........
0.16
(0.4)
Oil
Clearance
of
Journal
·
...............................
0.0008
-
0.0018
(0.021
-
0.045)
......
0.0039
(0.1)
Oil
Clearance
of
Pin
........
0.0009
-
0.0020
(0.022
-
0.052)
Undersize
rework
dimension
of
Journal
0.25
U.S
..................
1.5644
-
1.5650
(39.735
-
39.750)
0.50
U.S
..................
1.5545
-1.5551
(39.485
-
39.500)
0.75
U.S
.................
1.5447
-1.54539
(39.235
-
39.250)
Undersize
rework
of
dimension
of
pin
0.25
U.S
..................
1.4069
-
1.4075
(35.735
-
39.750)
0.50
U.S
..................
1.3970
-
1\3976
(35.485
-
35.500)
0.75
U.S
..................
1.3872
-
1.3878
(35.235
-
35.250)
Engines
&
Generators
53
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