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Gear Case and Impeller Shaft (Continued)
7.
Reassemble impeller shaft assembly if required.
Note: The impeller shaft/driven gear is nickel-
plated on the surfaces susceptible to corrosion. If
not careful when pressing on the ball bearing, this
nickel plating can chip or peel.
The following are suggested methods of installing
the ball bearing onto the impeller shaft:
a.
Coat the inner diameter of the bearing and the
bearing surface of the shaft with high pres-
sure grease. Place the bearing on a flat sur-
face and insert the shaft, square with the bear-
ing, into the bearing. Press with a light force
until the bearing and shaft have aligned prop-
erly, then fully press on the bearing to the
shoulder on the shaft.
b.
Place the impeller shaft in a freezer until the
shaft temperature stabilizes at 20
_
F or less.
Remove shaft from freezer, grease bearing
surface of shaft and quickly place bearing
onto shaft. The bearing should slide onto
shaft freely or with a very light force, until
bearing rests against the shaft shoulder. Al-
low shaft to sit for a few minutes at room tem-
perature before installing in pump.
c.
Warm the bearing with even heat, i.e. hot
plate, to a temperature of 250-300
_
F (hot to the
touch). With the shaft surface greased, quickly
place the bearing (handle with gloves or oven
mitt) onto the shaft until it rests against the
shaft shoulder. Allow bearing to cool until it
can be handled without gloves.
Note: DO NOT use an open flame or microwave to
heat bearing.
8.
Insert the impeller shaft assembly in the gear case.
Be sure the inner race is on the shaft end, tapered
end facing out.
9.
Using a new gasket, place the gear case cover on the
gear case and replace the ten hex head screws and
lock washers.
Note: It is very important to keep the mechanical
seal sealing surfaces clean and scratch free. Any
dirt, oil, or scoring can cause immediate failure or
premature wear.
Содержание E500 Series
Страница 7: ......
