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TM 5-4210-220-34
a.
Engine Parts (Standard Size, New) - Continued
MINIMUM
MAXIMUM
LIMITS
(2) Cylinder Liner
Outside diameter (upper surface) ..............................................................
5.3577"
5.3595"
Outside diameter (seal ring surface) ..........................................................
5.3347"
5.3365"
Outside diameter (lower surface) ...............................................................
5.2142"
5.2160"
Inside diameter
................................................................................
4.8390"
4.8415"
Out-of-round-inside diameter .....................................................................
0.0020"
0.0025"
Taper-inside diameter ................................................................................
0.0015"
0.0025"
Depth of flange BELOW block ...................................................................
0.0418"
0.0482"
Variation in depth between adjacent liners .................................................
0.0015"
(3)
Cross-Head Pistons and Rings
Piston crown:
Saddle-to-crown distance ..............................................................
2.7025"
2.7095"
Diameter:
At top
................................................................................
4.8104"
4.8134"
Below both compression rings ......................................................
4.8273"
4.8303"
Above and below seal ring groove ................................................
4.4650"
4.4750"
Above and below bearing saddle ..................................................
3.2360"
3.2370"
Compression rings:
Gap (top-fire ring) ..........................................................................
0.0250"
0.0450"
0.0600"
Gap (No. 2 and 3) .........................................................................
0.0250"
0.0450"
0.0600"
Clearance-ring-to-groove:
Top (Keystone fire ring) .................................................................
0.0010"
0.0050"
0.0070"
No. 2 (rectangular section) ............................................................
0.0100"
0.0130"
0.0220"
No. 3 (rectangular section) ............................................................
0.0040"
0.0070"
0.0130"
Measured with Keystone fire ring flush with outside diameter of piston crown.
Seal ring:
Gap (in skirt counterbore) ..............................................................
0.0020"
0.0170"
Clearance
................................................................................
0.0005"
0.0030"
0.0040"
Piston skirt:
Diameter (includes tin) ..................................................................
4.8318"
4.8340"
Clearance-skirt-to-liner ..................................................................
0.0051"
0.0097"
0.0120"
Seal ring bore ................................................................................4.5000"4.5030"
Piston pin bore ...............................................................................
1.5025"
1.5035"
1.5040"
Diameter above and below the piston pin may be 4.8280"
Oil control rings:
Gap (two rings in upper groove-turbo) ..........................................
0.0100"
0.0250"
0.0430"
Gap (two rings in upper groove-turbo) ..........................................
0.0070"
0.0170"
0.0350"
Clearance
................................................................................
0.0015"
0.0055"
0.0080"
(4)
Piston Pins (Cross-Head Piston)
Diameter
1.4996"
1.5000"
1.4980"
Slipper bearing (bushing):
Thickness at center .......................................................................
0.0870"
0.0880"
0.0860"
Clearance (edge of bushing to groove ..........................................
0.0005"
0.0105"
0.0120"
in piston)
(5)
Crankshaft
Journal diameter-main bearing ...................................................................
4.4985"
4.5002"
Journal diameter-conn. rod bearing ..........................................................
2.9985"
3.0002"
C-5
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