TM 5-3810-300-24&P-3
Cylinder Liner 1.6.3
cylinder bore gage on zero in master ring gage J 5580-
1. Also check the liner for taper and out-of-round.
NOTE: Dial bore gage master setting fixture J
23059 may be used in place of the master ring
gage.
To reuse the liner, the taper must not exceed .002 " and
the out-of-round must not exceed .0025 " . In addition,
the ridge formed at the top of the ring travel must be
removed. If the out-of-round exceeds .0025", rotate the
liner 90in the block bore and recheck.
Hone Used Cylinder Liner
A used cylinder liner must be honed for the following
Fig. 10 - Cylinder Liner Ridge Due to Wear
reasons:
removed by working a hone up and down the full length
1. To break the glaze (Fig. 9) which results after long
of the liner a few times.
periods of operation.
Whenever a liner is honed, it should be placed in a
2. To remove the ridge (Fig. 10) formed at the top by
fixture (a scrap cylinder block makes an excellent honing
the piston ring travel.
fixture). However, if it is necessary to hone a liner in the
cylinder block that is to be used in i building up the
When a liner has been in service for a long period, the
engine, the engine must be dismantled and then, after
bore becomes very smooth or glazed due to the rubbing
honing, the cylinder block and other parts must be
action of the piston rings. Unless this glaze is removed,
thoroughly cleaned to ensure that all abrasive material is
the time required to seat new piston rings will be
removed.
lengthened.
The hone J 5902-01, equipped with 120 grit stones J
The ridge formed at the top of the liner by the travel of
5902-14, should be worked up and down the full length
the piston rings must also be removed. Otherwise,
of the liner a few times in a criss-cross pattern that
interference with the travel of the new compression rings
produces hone marks on a 45 axis. This operation
may result in ring breakage.
may be performed with emery cloth if a hone is not
available.
Therefore, even though the taper and out-of-round are
within the specified limits, the glaze and ridge must be
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.
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
(Section 1.0).
Fitting Cylinder Liner in Block Bore
1. Wipe the inside and outside of the liner clean and
make sure the block bore and counterbore are clean.
2. Place a standard size cylinder liner insert (.1795"-
1800" thick) in the block counterbore (Fig. 11).
Fig. 9 - Glazed Surface of Cylinder Liner
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