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 TM 55-1905-221-14-1
Manufacturers'
Dimensions and
Desired
Component
Tolerances in Centimeters
Clearance
Maximum*
Allowable
Wear and
Minimum
Maximum
Minimum
Maximum
Clearances
(cm)
(cm)
(cm)
(cm)
In Centimeters
PISTON AND RINGS
Piston:
Height (centerline of bushing-to-top of piston)
8.9230
8.9357
......
......
......
Diameter:
At top .......................................................
10.7166
10.7239
At skirt (below ring grooves to bottom) .....
10.7780
10.7836
Clearance-piston skirt-to-liner ..................
........
........
.0102
.0203
.0305
Out-of-round ...........................................
........
.0018
........
........
........
Taper ......................................................
........
.0018
........
........
........
Compression rings:
Gap .....................................................
........
........
.0457
.1092
.1524
Clearance-ring-to-groove
Top ring .............................................
........
........
.0241
.0330
.0599
No. 2 ...................................................
........
........
.0191
.0279
.0381
No. 3 and 4 .........................................
........
........
.0140
.0229
.0330
Oil control rings:
Gap .........................................................
........
........
.0203
.0584
.1092
Clearance-ring-to-groove .........................
........
........
.0038
.0140
.0230
PISTON PINS
Diameter .....................................................
3.8090
3.81
........
........
3.8049
Pin-to-piston-clearance ................................
........
........
.0064
.0086
.0254
Pin-to-rod-bushing clearance .......................
........
........
.0038
.0061
.0254
Length .........................................................
9.1567
9.1948
........
........
........
Pin-to-retainer end clearance ......................
(retainer with lock ring)
........
........
.0406
.1626
.1626
1-23
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