Gorman-Rupp Pumps 13A9-B 733170 and up - Manual (Page 30)

OM-00636 10 SERIES
MAINTENANCE & REPAIR PAGE E - 7
To prevent damage during removal from
the shaft, it is recommended that bearings
be cleaned and inspected in place. It is
strongly recommended that the bearings
be replaced any time the shaft and bear­
ings are removed.
Inspect the shaft for distortion, nicks or scratches,
or for thread damage on the impeller end. Dress
small nicks and burrs with a fine file or emery cloth.
Replace the shaft if defective.
The bearings may be heated to ease installation.
An induction heater, hot oil bath, electric oven, or
hot plate may be used to heat the bearings. Bear­
ings should never be heated with a direct flame or
directly on a hot plate.
NOTE
If a hot oil bath is used to heat the bearings, both the
oil and the container must be absolutely clean. If
the oil has been previously used, it must be thor­
oughly filtered.
Heat the bearings to a uniform temperature no
higher than 250
_F (120_C), and slide the bearings
onto the shaft, one at a time, until they are fully
seated. This should be done quickly, in one con­
tinuous motion, to prevent the bearings from cool­
ing and sticking on the shaft.
Use caution when handling hot bear­
ings to prevent burns.
After the bearings have been installed and allowed
to cool, check to ensure that they have not moved
away from the shaft shoulders in shrinking. If
movement has occurred, use a suitable sized
sleeve and a press to reposition the bearings
against the shaft shoulders.
If heating the bearings is not practical, use a suit­
able sized sleeve and arbor (or hydraulic) press to
position the bearings on the shaft until fully seated
against the shaft shoulders.
When installing the bearings onto the
shaft, never press or hit against the outer
race, balls, or ball cage. Press only on the
inner race.
Position the inboard oil seal (35) in the pedestal
(22) with the lip positioned as shown in Figure
E-1. Press the oil seal into the pedestal until the
face is just flush with the machined surface in the
housing.
Slide the shaft (27) and assembled bearings (19
and 23) into the pedestal until the inboard bearing
seats against the pedestal bore. Be careful not to
damage the oil seal lip.
When installing the shaft and bearings into
the bearing bore, push against the outer
race. Never hit the balls or ball cage.
Apply a light coating of soft grease on the O‐ring
and the O‐ring groove. Replace the bearing retain­
er O‐ring (24).
Press the outboard oil seal (29) into the bearing re­
tainer (30) with the lip positioned as shown in Fig­
ure E-1. Press the bearing retainer into the pedes­
tal until it seats against the bearing. Be careful not
to damage the oil seal lip on the shaft keyway. Be
sure the setscrews (28) are fully screwed into the
bearing retainer, and that they are positioned hori­
zontally inline.
Install the same thickness of bearing adjusting
shim (31) as previously removed, and secure them
with the bearing retaining ring (26). Check the shaft
endplay.
NOTE
Shaft endplay should be between .002 and .010
inch (0,05 to 0,25 mm). Add or remove bearing ad­
justing shims to achieve the correct endplay.