Gorman-Rupp Pumps PAV3C60C-B-E10 575/3 All serial numbers - Manual (Page 45)

PA SERIES OM-06502
MAINTENANCE & REPAIR PAGE E - 18
Shaft and Bearing Reassembly and Installation
(Figure 5)
Inspect the shaft (29) 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.
Clean and inspect the bearings as indicated in
Shaft And Bearing Removal And Disassembly.
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.
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.
NOTE
Position the outboard bearing (35) on the shaft with
the retaining ring on the bearing O.D. toward the
drive end of the shaft.
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 against the shaft shoulders. This should be
done quickly, in one continuous motion, to prevent
the bearings from cooling and sticking on the shaft.
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 suitably sized
sleeve and a press to reposition the bearings
against the shaft shoulders.
If heating the bearings is not practical, use a suit­
ably sized sleeve and an arbor (or hydraulic) press
to install the bearings on the shaft.
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.
Secure the outboard bearing to the shaft with the
snap ring (5)
When installing the shaft and bearings into
the bearing bore, push against the outer
race. Never hit the balls or ball cage.
Slide the shaft and assembled bearings into the
bearing housing until the retaining ring on the out­
board bearing seats against the bearing housing.
Apply a light coating of oil to the lip of the oil seal
(6B) and press it into the mounting flange (10) with
the lip positioned as shown in Figure 5. The face of
the oil seal should be flush with the chamfer on the
mounting flange bore.
Install the mounting flange gasket (9) and secure
the mounting flange to the bearing housing with
the hardware (8 and 11). Be careful not to damage
the lip of the oil seal on the shaft keyway. Torque the
capscrews (11) to 41 ft. lbs. (5,6 m. kg.).
Apply a light coating of oil to the lip of the oil seals (6
and 6A) and press them into the lip seal holder (7)
with the lips positioned as shown in Figure 5.
Slide the assembled lip seal holder and lip seals
over the shaft, using caution not to roll the lip of the
inboard oil seal on the shaft shoulder. Secure the
lip seal holder to the bearing housing wiht the hard­
ware (8 and 12).
Lubricate the bearings as indicated in LUBRICA­
TION at the end of this section.