TM 5-3825-225-14&P
1-24. CYLINDER LINER.
a.
Type ......................................................................................................Cast Iron Dry Interference Fit
b.
Interface Fit of Liners ....................................................................0.003-0.005 in. (0.076-0.127 mm)
c.
Inside Diameter of Liner After Finish Boring and Honing ..............3.125-3.126 in. (79.375-79.40 mm)
d.
Height of Liner in Relation to Cylinder Block Top Face .......0.023-0.027 in. (0.584-0.686 mm) Above
e.
Overall Length of Liner ........................................................ 6.495-6.505 in. (164.973-165.227 mm)
1-25. PISTONS.
a.
Type ................................................................................................................................ Flat Topped
b.
Center Line of Piston Pin to Piston Skirt ......................................................... 1.157 in. (29.388 mm)
c.
Piston Height in Relation to Cylinder Block Top Face ....................0.002-0.006 in. (0.051-0.152 mm)
d. Bore Diameter for Piston Pin . ............................................. 1.06255-1.06275 in. (26.989-26.994 mm)
NOTE
There is a steel insert fitted above the top groove.
e.
Compression Ring Groove Width (Top) ..................................... 0.0805-0.0815 in. (2.045-2.070 mm)
f.
Compression Ring Groove Width (No. 2) ................................. 0.0645-0.0655 in. (1.638-1.664 mm)
g.
Compression Ring Groove Width (No. 3) .................................. 0.0645-0.0655 in. (1.638-1.664 mm)
h.
Oil Control Ring Groove Width (No. 4) . ....................................... 0.126-0.127 in. (3.200-3.226 mm)
i.
Oil Control Ring Groove Width (No. 5) .........................................0.190-0.191 in. (4.826-4.851 mm)
1-26. PISTON RINGS.
NOTE
Piston ring gaps quoted are measured in a ring gage of 3.125 in. (79.38 mm) bore. In practice,
for every 0.001 In. (0.0254 mm) difference In cylinder bore diameter from gage size, 0.003 in.
(0.076 mm) should be allowed.
a.
Compression (Top) ...................................................................................................... Parallel Faced
b.
Compression (No. 2 & No. 3)................................................................................ Internally Stepped
c.
Oil Control (No. 4) ............................................................................................. Laminated Segment
d.
Oil Control (No. 5) ..................................................................................................... Slotted Scraper
e.
Compression Ring Width (Top) .............................................. 0.0771-0.0781 in. (1.958-1.984 mm)
f.
Ring Clearance in Groove ......................................................... 0.0024-0.0044 in. (0.061-0.112 mm)
g.
Compression Ring Width (No. 2 & No. 3) ................................ 0.0615-0.0625 in. (1.562-1.587 mm)
h.
Ring Clearance in Groove ............................................................. 0.002-0.004 in. (0.051-0.102 mm)
i.
Scraper Ring Width (No. 5) ...................................................... 0.1865-0.1875 in. (4.737-4.762 mm)
1-6
