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Page Title:
REPAIR AND REPLACEMENT STANDARDS - CONTINUED |
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 TM 9-2320-269-34-1
REPAIR AND REPLACEMENT STANDARDS - CONTINUED
COMPONENT
MANUFACTURER'S DIMENSIONS
MAXIMUM ALLOWABLE
POINTS OF
AND TOLERANCES IN INCHES
WEAR AND CLEARANCE
MEASUREMENT
(MILLIMETERS)
IN INCHES (MILLIMETERS)
MINIMUM
MAXIMUM
PISTON PINS
Length
3.240 (82.30)
3.250 (82.55)
Diameter
1.4998 (38.095)
1.5000 (38.1)
Pin fit at 70F
(21 C):
Clearance in rod
0.0009 (0.023)
0.0013 (0.033)
Clearance in piston
0.0002 (0.005)
0.0006 (0.015)
loose
PISTON RINGS
Diameter
4.5(114.3)
Compression rings
Size (top)
Tapered
Size (second)
3/32 (2.83)
Fit in groove (top)
Tapered
Fit in groove (second)
0.0035 (0.089)
0.0055 (0.140)
Gap
0.013 (0.33)
0.023 (0.58)
OIL CONTROL RINGS
Size
0.188 (4.763)
Fit in groove
0.0015 (0.038)
0.003 (0.076)
Gap
0.013 (0.33)
0.028 (0.71)
INTAKE VALVES
Valve lift
0.455 (11.56)
Stem diameter
0.3725 (9.461)
0.3730 (9.474)
Clearance in guide
0.0008 (0.020)
0.0023 (0.054)
Face angle
45 degrees
Seat angle
45 degrees
Seat width
0.080 (2.03)
0.090 (2.29)
Maximum seat runout
0.002 (0.05)
Maximum face runout
0.002 (0.05)
Seat insert and
counterbore data:
Standard
Insert od
2.204 (55.98)
2.207 (56.06)
Counterbore diameter
2.200 (55.88)
2.204 (55.98)
0.002 (0.05) oversize
Insert od
2.206 (56.03)
2.207 (56.06)
Counterbore diameter
2.202 (55.93)
2.204 (55.98)
0.030 (0.762) oversize
Insert od
2.234 (56.74)
2.235 (56.77)
Counterbore diameter
2.230 (56.64)
2.232 (56.69)
1-8
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