TM 9-6115-604-34
NAVFAC P-8-633-34
(c)
If the crankshaft seal area is deeply scored, fill the groove with plastic steel, and install the wear
sleeve before the filler hardens.
(d)
If the groove in the crankshaft does not require filling, apply a light coating of sealant, MIL-S-451 80,
to the inner surface of the repair sleeve.
NOTE
If the installation tool supplied with the repair sleeve is too short to install the sleeve to the
desired position, a length of tubing or pipe can be substituted as an installation tool. The
tubing or pipe substituted for the installation tool should have an inside diameter slightly
larger than the crankshaft.
(e)
Place the repair sleeve into the end of the installation tool. Using a hammer and large wood block,
gently tap the center of the installation tool until the sleeve covers the wear pattern caused by the
seal.
(f)
Remove the repair sleeve flange at the pre-cut line. Use side cut pliers to cut and pull the flange
away from the sleeve twisting it into a coil. The flange will break loose along the pre-cut line.
CAUTION
The crankshaft and repair sleeve must be free of any burrs which might cut the seal lip.
(g)
Remove excess sealer, and dean up any burrs that may have been raised during installation.
(49)
Polish the crankshaft journals, fillet areas, bossing surfaces, and thrust surfaces as follows:
CAUTION
Improper surface finish of the journal fillets may load to metal fatigue and crankshaft failure.
Improper surface finish will also result In rapid wear of the bearing Inserts. Polishing is
essential after grinding to attain the proper surface finish.
(a)
To prevent the entrance of polishing dust, plug the oil passage holes with soap or heavy grease, and
install the pipe plugs (1, Figure 9-38). Snug-tighten the pipe plugs.
(b)
Install the crankshaft in the grinder, and set up the head and tail stock as for grinding the rod journals
in accordance with steps (5) and (6), above.
(c)
Polish and blend the radius around each oil hole using a die grinder A-A-544, and progressively finer
polishing stones to 400 grit.
(d)
Equip the polishing head with a 400 grit belt. Turn the crankshaft in the direction of rotation
clockwise when viewed from the front, and turn the polishing belt in the opposite direction.
(e)
Polish the journal bearing surface to a finish of 16 microinch (0.406 micrometer) RMS.
(f)
Polish the journal fillets and bossing surfaces to a finish of 30 microinch (0.76 micrometer) RMS.
(g)
Set up the grinding machine for polishing the main bearing journals in accordance with steps (24)
and (25), above.
(h)
Polish the main bearing journals and fillet areas in accordance with steps (e) and (f), above.
(i)
Polish the thrust flange surfaces to a finish of 16 microinch (0.41 micrometer) RMS.
(j)
Remove the crankshaft from the grinding machine, remove the pipe plugs (1, Figure 9-38), and
thoroughly dean the oil passages and journals in accordance with step c, above.
g. Assemble.
(1)
Install the pipes plug (1, Figure 9-38) using no more than 3 drops of thread locking compound, MIL-S-
46163, and tighten to 5 to 7 pound-feet (7 to 9 newton-meters).
(2)
Install the counterweights (3) in the same position from which they were removed using capscrews (2).
Crosstighten the capscrews in three steps to 200 to 210 pound-feet (271 to 285 newton-meters).
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