Gorman-Rupp Pumps 13A20-B 712987 and up - Manual (Page 30)

OM-00632 10 SERIES
MAINTENANCE & REPAIR PAGE E - 7
If bearing replacement is required, use a bearing
puller or an arbor (or hydraulic) press to remove
the bearings from the shaft.
Press the inboard oil seal (13) from the pedestal
bore.
Shaft and Bearing Reassembly and Installation
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.
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 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.
Position the inboard oil seal (13) in the pedestal
(16) 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
pedestal.
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
pedestal until the inboard bearing seats against
the pedestal bore. Be careful not to roll or damage
the lip of the oil seal (13).
Install a new O‐ring (18) in the groove in the pedes­
tal and lubricate it with light grease.
Press the outboard oil seal (21) into the bearing re­
tainer (19) with the lip positioned as shown in Fig­
ure E-1. Be sure the setscrews (24) are fully
screwed into the bearing retainer. Position the
bearing retainer in the pedestal bore with the set­
screws positioned horizontally in line. Be careful
not to damage the lip of the oil seal (21) on the shaft
keyway. Press the bearing retainer into the pedes­
tal until it is fully seated against the outboard bear­
ing.
Install the same thickness of bearing adjusting
shims (25) as previously removed. Secure the
bearing retainer and shims using the bearing re­
taining ring (20) and check the shaft endplay.
NOTE
Shaft endplay should be between .002 and .010
inch (.05 to .25 mm). Add or remove bearing adjust­
ing shims to achieve the correct endplay.
Slide the slinger ring (12) onto the shaft.
Lubricate the pedestal as indicated in LUBRICA­
TION at the end of this section.