OM-07297
DIAPHRAGM PRIMER
MAINTENANCE & REPAIR
PAGE E - 7
Figure E-3
Lathe Dog Arm
“V” Notch
Shaft Key
Crankshaft
Lathe Dog
Setscrew
Heavy
Bar Stock
Remove the bearing retaining washer (19) by sta
bilizing the crankshaft (27) at the drive end with the
use of a lathe dog, shown in figure E-3, or other
means. Disengage the cap screw (18) and remove
the two components together.
Carefully slide the crankshaft (27) out towards the
drive end of the bearing housing (1) far enough to
remove the slinger (22) on the bearing retaining
washer end of the shaft. Slide the crankshaft
through the bearing housing. It may be necessary
to use a small rubber mallet on the bearing cover
end of the shaft to start the bearing movement. Use
caution not to damage the material should it be
come necessary to use a flat head screwdriver to
manipulate the remaining slinger (22) through the
opening in the housing.
Remove the connecting rod assembly (2) by
pulling it downward and out through the inspection
cover (34) opening. Inspect the neck seal (3) for
damage.
After the crankshaft and bearings have been re
moved, clean and inspect the bearings (21 and 25)
in place
as follows.
Most cleaning solvents are toxic and
flammable. Use them only in a well ven
tilated area free from excessive heat,
sparks, and flame. Read and follow all
precautions printed on solvent contain
ers.
Clean the bearing housing, shaft and all compo
nent parts (except the bearings) with a soft cloth
soaked in cleaning solvent. Inspect the parts for
wear or damage and replace as necessary.
Clean the bearings thoroughly in
fresh
cleaning
solvent. Dry the bearings with filtered compressed
air and coat with light oil.
Bearings must be kept free of all dirt and
foreign material. Failure to do so will great
ly shorten bearing life.
Do not
spin dry
bearings. This may scratch the rollers or
races and cause premature bearing fail
ure.
Rotate the bearings by hand to check for rough
ness or binding and inspect the bearing rollers. If
rotation is rough or the bearing rollers are discol
ored, replace the bearings.
The bearing tolerances provide a tight press fit on
to the shaft and a snug slip fit into the bearing hous
ing. Replace the bearings, shaft, or bearing hous
ing if the proper bearing fit is not achieved.
If bearing replacement is required, use a pair of
snap ring pliers to remove the snap ring (26). Use a
bearing puller to remove the bearing (21 or 25)
from the shaft.
If the slingers (22) are damaged, they should be re
placed. Slide the remaining slinger off the drive end
of the shaft. It is recommended that they both be
replaced once disassembled to this point.
If the bearing (14) or the retaining ring (24) con
tained in the bearing housing (1) are damaged,
they should be replaced. To replace the bearing,
use a flat metal plate or dowel of the appropriate di
ameter to press the bearing down and out of the
opening. Add a lubricant such as a light grease or
oil on the O.D. of the new bearing, and press it into
the bearing housing in the same manner used to
remove the old one. Use care not to damage any
machined faces. The top of the new bearing
should be lined up with the top of the opening in the
