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TM5-4210-229-14&P
6-13. FLYWHEEL, CRANKSHAFT, AND MAIN BEARING MAINTENANCE (Continued).
b. Flywheel and ring gear inspection.
Cleaning solvent, (Appendix D, Item 54), is
both toxic and flammable. Keep off skin.
Use only in a well ventilated area and avoid
proIonged breathing of vapors. Keep away
from open flames.
(1) Wash the flywheel and ring gear in cleaning
solvent (Appendix D, Item 54)
Compressed air used for cleaning or drying
can create airborne particles that may enter
the eyes. Pressure shall not exceed 30 psi
(206 kPa). Wearing of goggles is required to
avoid injury to personnel.
(2) Dry with compressed air.
(3) Visually inspect flywheel for excessive
scoring or heat cracks. Replace if neces-
sary.
(4) Inspect the ring gear for broken teeth and
replace it if necessary.
c. Crankcase inspection.
(1) During overhaul it is best to clean the
crankcase in a chemical hot tank. This re-
moves all carbonous material and mineral
deposits that collect in the cooling pass-
ages.
(2) Clean all lube oil passages thoroughly.
Cleaning solvent, (Appendix D, Item 54) is both
toxic and flammable. Keep off skin. Use only in
a well ventilated area and avoid prolonged
breathing of vapors. Keep away from open
flames.
(3) Remove gallery plugs and swab with a brush
(Appendix D, Item 9) and cleaning solvent
(Appendix D, Item 54)
Compressed air used for cleaning or drying can
create airborne particles that may enter the
eyes. Pressure shall not exceed 30 psi
(206 kPa). Wearing of goggles is required to
avoid injury to personnel.
(4) Clean all threaded holes with a tap of ap-
propriate size and blow clean with com-
pressed air.
(5) Check the crankcase deck for pulled thread
holes which may interfere with the head and
gasket fit. Lightly file these areas to re-
store flatness.
CAUTION
Do not resurface the block. Any defects in the
surface not correctable by light filing necessi-
tates crankcase replacement.
(6) Inspect the 12 piston oil jet tubes. Be sure
they are open and clean.
CAUTION
Do not remove oil jets unless damaged.
(7) Oil jet tube replacement.
(a) Remove damaged tubes with a pilot driver.
6-38
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