| Tweet |
Custom Search
|
|
|
||
 TM 55-1905-217-34
breakage. Therefore, even through the taper and out-of-round are within the specified limits, the glaze and ridge must
be removed by working a hone up and down the full length of the liner a few times.
(3) Whenever a liner is honed, it should be placed in a fixture (a scrap cylinder block makes an excellent
honing fixture). However, if it is necessary to hone a liner in the cylinder block that is to be used in building up the
engine, the engine must be dismantled and then, after honing, the cylinder block and other parts must be thoroughly
cleaned to ensure that all abrasive material is removed.
(4) Use 120 grit stones and hone the liner in a criss-cross pattern that produces hone marks on a 45 o
axis. This operation may be performed with emery cloth if a hone is not available.
(5) After the liner has been honed, remove it from the fixture and clean it thoroughly. Then, dry it with
compressed air and check the entire surface for burrs.
(6) After honing, the liner must conform to the same limits on taper and out-of-round as a new liner, and
the piston-to-liner clearance must be within the specified limits shown in table 2, chapter one.
e. Inspection of New Cylinder Liner. Install the cylinder liner in place in the cylinder block and check it for:
Inside diameter, out-of-round, and taper. Check the inside diameter at the various points shown in figure 3-77. The
inside diameter of a new standard size liner is 4.2495 inches to 4.2511 inches. If the liner is more than .002 inch total
indicator reading out-of-round, turn it 90in the block bore and recheck. A new liner must also be straight from top to
bottom within .001 inch. Refer to table 2, chapter one for the specified piston-to-liner clearance.
NOTE
Do not modify the surface finish in a new service liner. Since the liner is properly
finished at the factory, any change will adversely affect the seating of the piston
rings.
f. Fitting Cylinder Liner in Block Bore. The top face of the cylinder liner flange must be .0465 inch to .050 inch
below the top surface of the cylinder block to provide proper sealing of the cylinder head compression gasket. Install
the liner in the block and proceed as follows:
(1) Wipe the inside and outside of the liner clean, and make sure the counterbore in the block is clean,
so the liner insert will seat properly. The counterbore must be from .4785 inch to .4795 inch in depth and must not vary
more than .001 inch in depth around the circumference.
(2) Place a liner insert in the counterbore of the block (fig. 3-78).
3-107
|
||
|
||
