Minimum flow .......................3.5 scfm
Original
Wear
Minimum reseal pressure 1, 950 psig
Component
dimensions
limits
Leakage rate ............... 3 cc. per min.
Min (In.)
Max
(In.) (In.)
(5) Gasoline engine.
SECOND STAGE CYLIN-
Make Military Standard ............ A08-3
DER AND PISTON
Type ....................... 4-cycle, gasoline,
ASSEMBLY
overhead valve, air-cooled
*Cylinder bore
0.9687
0.9688
Number of cylinders .........................1
Piston-to-cylinder Wall
Bore .................................... 2.250 in.
clearances
0.0002
0.0004 0.0003
Stroke .........................................2 in.
Wristpin hole
0.4366
0.4368 0.0002
Piston displacement............... 8 cu in.
Wristpin diameter
0.4363
0.4365 0.0001
Compression ratio.........................6:1
Piston head clearance 0.002
0.006
THIRD STAGE CYLIN-
Horsepower (at 3, 600 rpm) ..........1.5
DER AND SLEEVE
ASSEMBLY
b. Recommended Wrench Torque for Steel Nuts
*Cylinder bore
0.4050
0.4055
and Bolts.
Piston-to-cylinder
wall clearance
0.00020
0.00025 0.0002
National Fine
National Coarse
Wristpin hole
0.4366
0.4368 0.002
Wristpin diameter
0.4363
0.4365 0.0001
Thread
Thread
Piston head clearance 0.002
0.006
size
(pound-
size
(pound-
COMPRESSOR CON-
foot)
foot)
NECTING LINKS
8-32
1 to 2
8-32
1 to 2
AND MASTER ROD
10-32
1 to 2
10-24
1 to 2
Connecting link wristpin
1/4-28
5 to 8'
1/4-20
4 to 6
bearing hole
0.5615
0.5620 0.0002
5/16-24
10 to 15
5/16-18
8 to 12
Master rod connecting
3/8-24
18 to 27
3/8-15
15 to 22
link holes
0.4366
0.4368 0.0003
7/16-20
28 to 42
7/16-14
24 to 36
First stage wristpin
1/2-20
45 to 68
1/2-13
37 to 56
bearing hole
0.5590
0.5594 0.0002
9/16-18
64 to 97
9/16-12
56 to 83
Shaft bearing hole
1.8750
1.8754 0.0003
5/8-18
98 to 138
5/8-11
75 to 112
ENDBELL
3/4-16
158 to 242
3/4-10
137 to 200
Shaft seal bore diameter 1.499
1.500 0.0005
7/8-14
258 to 384
7/8-9
218 to 316
Bearing bore diameter 1.8502
1.8505 0.0001
1-14
400 to 600
1-8
316 to 484
COMPRESSOR SHAFT
Shaft seal diameter
c
Wear Limits.
(fan end)
0.934
0.940
0.002
Bearing diameter
Original
Wear
(fan end)
0.9842
0.9845 0.0001
Component
dimensions
limits
Master rod journal
diameter
.8724
1.8728 0.0003
Min (In.)
Max
(In.) (In.)
Bearing diameter (op-
FIRST STAGE CYLIN-
posite fan end)
.1809
1.1811 0.0001
DER AND PISTON
Shaft seal diameter
ASSEMBLY
(opposite fan end)
1.059
1.065
0.002
*Cylinder bore
2.1875
2.1876
RETAINER PLATE
Piston-to-cylinder wall
Thickness
0.092
0.094
0.002
clearance
0.0003
0.0005 0.0005
Retainer pinhole diameter 0.253
0.257
0.002
Wristpin hole
0.3754
0.3756 0.0002
OIL PUMP PISTON
Wristpin diameter
0.3751
0.3753 0.0001
Large diameter
0.5595
0.5605 0.001
Piston head clearances
0.021
0.026
Small diameter
0.3790
0.3795 0.0005
OIL PUMP CYLINDER
Inner diameter
0.3798
0.3801 0.0005
*Cylinder bore may be sip to 0.001 oversize for matching with piston diameter; clearance is held as stated.
5
