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 TM 55-1905-219-14-7
3-171.1. PISTON - MAINTENANCE INSTRUCTIONS (Continued).
LOCATION
ITEM
ACTION
REMARKS
REASSEMBLY (Cont)
Refer to the Table for
piston diameter spec-
ifications.
ENGINE PARTS
MINIMUM
MAXIMUM
LIMITS
(Standard Size, New)
(inches)
(cm)
(inches)
(cm)
(inches)
(cm)
Piston:
Height (centerline of
8.9992
3.5480
9.0119
3.5430
bushing to top) ..........................
Diameter (above compres-
10.7252
4.2255
10.7328
4.2225
sion rings) .................................
10.7767
4.2450
10.7823
4.2428
Diameter (at skirt) ............................
Clearance--piston skirt-
.0305
.0114
.0083
.0211
.0120
.0045
to-liner.......................................
.0005
.0013
Out-of- round ...................................
.0005
.0013
Taper...............................................
Compression rings:
.0600
.1524
.0584
.0380
.0965
.0230
Gap (top-fire ring) ............................
.0600
.1524
.0457
.0430
.1092
.0180
Gap (No. 2, 3 and 4) ........................
Clearance--ring-to-groove:
No. 1 (top-fire
.0457
.0180
.0102
.0070
.0178
.0040
ring) ..........................................
.0559
.0220
.0254
.0130
.0330
.0100
No. 2. ........................................
.0330
.0130
.0102
.0070
.0178
.0040
No. 3 and 4 ...............................
Oil control rings:
.1092
.0430
.0203
.0230
.0584
.0080
Gap .................................................
.0203
.0080
.0038
.0055
.0140
.0015
Clearance ........................................
2. A new cylinder liner has
an inside diameter of
4.2495 to 4.2511 inch
(10.7937-10.7978 cm).
Piston-to-liner clear-
ance, with new parts,
will vary with the par-
ticular piston diameter.
A maximum clearance of
.012 inch (O.030 cm) is
allowed with used parts.
3-2923
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