ENGINE
SPECIFICATIONS (Cont'd)
All
dimensions are given
in
inches. Respective metric dimensions are given in millimeters enclosed
by
parentheses.
Cylinders
Piston Ring Side Clearance, Oil Ri
ng
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
..
.0015-.0028
(0
,
040-0
,072 mm)
Compression Ring End Gap
(Normal)
....
. . .
...........
.
..
.
.......
.
........
.
..
. . . .
0138-
.0216
(0
,
35-0
,55 mm)
Slotted Oil Control Ring End Gap (Norma
l)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
..
.
0098-
.0157
(0
,25-0,40 mm!
Maximum Ring End Gap
(All) (Wear Limi
t)
. .
..
....
.
.. ..
..
..
..
.......
...................
...
.
...
...
079
(2
,0 mm
Piston Crown
Clearance (Measure with Lead Wire)
...
.. .. ..
.
..
. .
..
.
.............
.. .. .. ..
.
..
.
039-
.047
(1
,0-1 ,2
NOTE: The
cylinders
must
be
within
35
PSI
(241
kPa)
of
each
other
.
1.0
. of Bore
in
Connecting Rod for Wrist Pin Busing
..
..
. .
.....
.
...
.
..........
....
1.4961-1.4967 (38,
000-38
,
0161
1.0
. of Wrist .Pin Bushi':lg (Installed)
.........
.
.....
...
: . .
.....
.
....
.
..
.
...
.
.......
1.379-1 .
3811
(35,036-35,080
1.
0. of Bore
In
connecting Rod for Connecting Rod Beanng . . .
........
..
..
..
...
.
..
2.244-2.254 (57,0-57,019 mm
Connecting Rod Bearing Clearance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
..
.002-0043
(0
,
05-0
,108 mm
Connecting Rod Beanng Side Clearance (End Play) .
...
. .
....
. . .
... ...
.
..
.
.............
007-
.
011
(0
,
170-0
,
271
Connect!ng Rod Bear!ng C!earance (Maximum)
....
.
......
... ...
..
.... ....
.............
.
........
..
. .012
(0
,
3~
Connecting Rod Bearing Side Clearance (Maximum) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0236
(0
,6 mm
Camshaft, Crankshaft, Bearings
1.
0. of Camshaft Bushing
....
. . .
........
.
.......
...
.......
...
. .
...
.
..
.
.......
. . 1.8902-1 .8922 (48,01-48,064
Camshaft End Play
...
. .
..
..
.
....
.
....
.
..........
.
....
.
...
..
. .
........
.
...
.
.........
010-
.024 (0,25-0,6 mml
D!ameter
of Crankp!n, Standard
..
. . .
.....
. . .
...
.....
..
....
. . .
... ...
..
......
..
.
..
2.046-2.0468 (51,971-51 ,990
Diameter of
Crankpln, 1 st Undersi
ze
. .
..........
...
.
..
...
.
...
.. ..
.
..
.
...
.. ..
.
..
2.0263-3.0371 (51,471-51,490
Diameter of
Crankpln, 3rd Undersize
..
...
. . . .
.........
. .
..
. .
...
..
......
....
.
....
1.987-1.9877 (50,471-50,490
D!ameter
of Crankp!n, 2nd
Under~ize
.
............
. .
.. ..
.
............
.
.........
2.
0066-2
.0075 (50,971-50,
9901
Width of Crankpin . .
...
..
..
. . .
....
....
..
.
...
.............
.
..
. . .
......
....
.
.. ..
1.338-1.3401 (34,000-34,039
Diameter of Crankshaft Main Journals, Standard
...
.
..
. . .
..
.
...
....
.
.......
.
..
.
..
2.5185-2.5193 (63,971-63,99
Diameter of Crankshaft Main Journals, 1st Undersize
..
. . . .
...
.
..
.
...............
2.4888-2.4996 (63,471-63,490
Diameter of Crankshaft Main Journals, 2nd Undersize . . . .
..
......
.
..
. . .
......
.
..
. 2.4791-2.4799 (62,971-62,990
Diameter of Crankshaft Main Journals, 3rd Undersize .
..
..
.
.....
..
. .
.....
.. ..
. . . 2.4595-2.4602 (62,471-62,4900
Crankshaft Center Journal, Standard
.. ..
. .
.....
.
..
..
..
.
..
.
....................
. 2.3611-2.3618 (59,971-59,990
Crankshaft Center Journal, 1st Undersize .
...
...
....
..
...
.
..
. . .
..
. . . .
.........
. . 2.3414-2.3421
~59,471-59,490~
Crankshaft Center Journal, 2nd
Under~ize
. . .
..
.
......
.
....
...........
. . .
..
..
..
. 2.3217-2.3224 58,971-58,990
Crankshaft Center Journal, 3rd Undersize
..
.
...
.
....
.
.....
. . .
..
...............
..
2.302-2.3028 58,471-58,490
Maximum
Out-of-Round
Tolerance of Journals . . . .
....
.
...
...
.
......
.
.......
.
..
.
..
. .
....
. .
.....
.00275
(0
,07)
End
Play of Crankshaft .
...
. . .
...
.
..
. .
...
.
..
......
.
.......
.....
.
....
.
......
.
.......
. . . . 0078-.0157
(0
,
2-0,4)
Hardness of Journals (Minimum)
........
. .
..
.........
.
...
. . . . . .
....
.
....
... ...
..
...
...
...
.
......
. . . 50 HRC
Hardness of
Journals (Normal)
......
...
.
..........
......
..
. . . . .
......
..
......
.
..
. .
......
.
...
. .
..
55-61 HRC
Lubrication System
Oil Pressure Minimum at 2500 RPM
.......
.
.....
.
..
.
.....
....
.
.......
.
...
. . .
..
. . .
...
...
.
60-75
PSI
(4-5
bar
Oil Pressure Minimum at Low
Id
le . .
...
. . .
.......
......
...
.
....
. . . .
..
...
. .
..
.
...
..
...
. .
.. ..
7.25
PSI
(0,5
bar~
End
Clearance
in
Oil Pump Gear
...
. . . . .
.. ..
...
. .
..
...
.
..
...
.
...
.
.....
...
.
.. ..
..
..
......
. .
...
...
004
(,1
mm
Check
oil level every 8 hours of operation. (Check oil every 4 hours on new engine during the first 50 hours of operation.)
Oil level must be between the add and full marks on the dipstick. Use a good quality detergent motor oil that meets the
correct
API service classificati
on
CC or CD.
Use
oil of the correct SAE viscosity for expected temperature conditions.
Revised Sept.
90
-SA-4-
741,
742,743
& 7430S Bobcat Loader
Service Manual
To Next Page
Loading...