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 TM 55-1905-219-14-4
3-40.1. PISTON-MAINTENANCE INSTRUCTIONS (Cont).
LOCATION
ITEM
ACTION
REMARKS
REASSEMBLY (Cont)
ENGINE PARTS
MINI MUM
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) .......... ................ 4.222510.7252
4.2255 10.7328
Diameter (at skirt) ... ............ ..4.242810.7767
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
c. Piston
Assemble.
Refer to para-
and con-
necting
rod
d.
Piston
Lubricate for installa-
Use engine oil.
and all
tion.
piston
rings
3-835
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