CRANKSHAFT, MAIN BEARINGS, FLYWHEEL & CRANKCASE
Maintain a grinding wheel speed of
6500 surface feet per minute with a
work spindle speed of approximately
40 to 45 RPM, for satisfactory results.
CAUTION! As a normal precaution, it is
recommended that a CO2 fire extinguisher be near
the grinding machine, just In case any excessive
heat should ignite the oil. If a fire should start, it can
be rapidly extinguished without causing any damage
to the machine or surrounding area by following the
normal fire-extinguishing procedure.
Feed rates should be slower than
normal to prevent any burning.
Maintain grinding limits as shown in
Allow the shaft to thoroughly cool, prior to
inspecting for dimensional tolerances.
Prior to lapping inspect for burning during
the regrinding procedure with TAROSOV
ETCH as follows:
CAUTION! Due to the sharp odor and
flammability of the Tarosov Etch, the etching should
be done In a well-ventilated area, away from any
Clean the surface with a scouring
powder and water or a good solvent.
Apply etchant No. 1 (4 parts Nitric acid
in 96 parts water) for approximately 16
seconds with a cotton swab.
Rinse with water and dry.
Hydrochloric acid in 98 parts acetone)
for approximately 15 seconds with a
CAUTION! Acetone Is highly flammable.
Rinse with alcohol and dry thoroughly
with compressed air.
TAROSOV ETCH will show up as a
change of color after each etch, if the
crankshaft has been burned. Areas
rehardened by excessive heat appear
nearly white, while softened areas turn
unaffected by the heat of grinding etch
a light gray.
SCRAP THE CRANKSHAFT IF ANY BURNS
SHOW UP AFTER ETCHING.
After grinding and lapping visually inspect
the surface for grinding cracks, using
magnaflux on Elotherm crankshafts.
SCRAP THE SHAFT IF ANY SUR-FACE
CRACKING IS FOUND.
Inspect the Flywheel and Ring Gear as follows:
When used with clutches having bi-metallic-driven
members examine the contact face of the flywheel
for heat cracks and scoring. Service or replace if
scoring is excessive.
When used with clutches having ceremetallic-
driven members, scoring of the flywheel is normal.
However, if scoring is excessive reface or replace
the flywheel as required.
Inspect the ring gear for broken teeth and replace
it if necessary.
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