mounting surface. If an arbor press is
INSPECTING CAST PARTS, MACHINED
not available, seat the bearing with a
SURFACES. Inspect bores for wear,
drift and hammer, driving against the
grooves, dirt and scratches. Remove all
supported race.
scratches and burrs with crocus cloth.
Remove foreign matter. Replace parts
INSPECTING BUSHING, THRUST WASH-
that are deeply grooved or scratched.
ERS. Inspect bushings for scores,
burrs, roundness, sharp edges and evi-
Inspect all oil passages for obstructions.
dence of overheating. Remove scores
If an obstruction is found, remove it
with crocus cloth. Remove burrs and
with compressed air or by working wire
back and forth through the passage and
sharp edges with a scraper or knife
flushing it out with cleaning solvent.
blade. If the bushing is out of round,
deeply scored or excessively worn, re-
place it using the proper size replacer.
Inspect mounting faces for nicks, burrs,
scratches and foreign matter. Remove
such defects with crocus cloth or a soft
NOTE
stone. If scratches are deep, replace
Sometimes it is necessary to cut
the defective part.
out a defective bushing. Be care-
Inspect threaded openings for damaged
ful not to damage the bore into
threads. Chase damaged threads with
which the bushing fits.
the correct size used tap.
Inspect thrust washers for distortion,
scores, burrs and wear. Replace the
thrust washer, if it is defective or worn.
It is much less expensive to replace such
A new tap can cut oversize.
parts than to replace converter elements,
which can fail due to defective bearings,
Inspect all machined surfaces for damage
bushings or thrust washers.
that could cause oil leakage or other mal-
function of the part. Rework or replace
INSPECTING OIL SEALS, GASKETS. In-
the defective parts.
spect seal rings for cuts, hardness or
other indications of deterioration. Re-
INSPECTING BEARINGS. Inspect bear-
place the seal rings if these defects are
found.
ings for roughness of rotation. Replace
a bearing if its rotation is still rough af-
ter cleaning and oiling.
When replacing lip type seal rings, make
sure the spring loaded side is toward the
Inspect bearings for scored, pitted,
oil to be sealed in (toward the inside of
the unit). Use a nonhardening sealing
scratched, cracked, or chipped races,
and for indication of excessive wear of
compound on the outside of the seal to
rollers or balls.
If one of these defects
help prevent oil leaks.
if found, replace the bearing.
Replace all composition gaskets.
Inspect a defective bearing's housing
Inspect hook type seal rings for wear,
and shaft for grooved, burred or galled
broken hooks and distortion.
conditions that would indicate that the
bearing has been turning on its housing
or shaft. If the damage cannot be re-
Install a new hook type seal ring if it is
worn so much that there is no gap be-
paired with crocus cloth, replace the
tween the hooks of the seal ring when it
defective part.
is installed.
When installing a bearing on a shaft,
INSPECTING GEARS. Inspect gears for
heat the bearing to 300F (149C) on an
scuffed, nicked, burred or broken
electric hot plate or in an oil bath. Coat
teeth. If the defect cannot be removed
the mating surface with white lead and
with a soft stone, replace the gear.
use the proper size installation sleeve
and an arbor press to seat the bearing.
Inspect gear teeth for wear that may
have destroyed the original tooth shape.
If a bearing must be removed or installed
If this condition is found, replace the
w i t h o u t a sleeve, be careful to press on-
gear.
ly on the race which is adjacent to the
Transmissions 4C-15
