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 TM 55-1905-220-14-5
3-96.1. PISTON - MAINTENANCE INSTRUCTIONS (Cont).
LOCATION
ITEM
ACTION
REMARKS
REASSEMBLY (Cont)
ENGINE PARTS
MINIMUM
MAXIMUM
LIMITS
(Standard Size, New)
(inches)
(cm)
(inches)
(cm)
(inches)
(cm)
PISTON
Height (centerline of
bushing to top) .............................
3.5430
8.9992
3.5480
9.0119
Diameter (above compres-
sion rings) ....................................
4.2225
10.7252
4.2255
10.7328
Diameter (at skirt) ..... .........................
4.2428
10.7767
4.2450
10.7823
Clearance-piston skirt-
to-liner ..........................................
.0045
.0114
.0083
.0211
.0120
.0305
Out-of-round .......................................
.0005
.0013
Taper..................................................
.0005
.0013
Compression rings:
Gap (top-fire ring) .........................
.0230
.0584
.0380
.0965
.0600
.1524
Gap (No. 2, 3 and 4)....................
.0180
.0457
.0430
.1092
.0600
.1524
Clearance--ring-to-groove:
No. 1 (top-fire
ring)..............................................
.0040
.0102
.0070
.0178
.0180
.0457
No. 2 ...........................................
.0100
.0254
.0130
.0330
.0220
.0559
No. 3 and 4..................................
.0040
.0102
.0070
.0178
.0130
.0330
Oil control rings:
Gap ..............................................
.0080
.0203
.0230
.0584
.0430
.1092
Clearance.....................................
.0015
.0038
.0055
.0140
.0080
.0203
2. A new cylinder liner
has an inside diam-
eter of 4.2495 to
4.2511 inch (10.7937
to 10.7978 cm). The
piston-to-liner clear-
ance, with new parts,
will vary with the
particular piston di-
ameter. A maximum
clearance of .012
inch (0.031 cm) is
allowable with used
parts.
3-1635
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