Gorman-Rupp Pumps 112B60-B 758209 and up - Manual (Page 28)

10 SERIES OM-01828
MAINTENANCE & REPAIR PAGE E - 8
ward the center (see Figure E-2). Also make cer­
tain that the inner bearing is seated squarely
against the shaft shoulder, and that the inner races
contact each other.
Figure E-2. Correct Bearing Mounting
While the bearings are still hot, promptly install the
bearing lockwasher and locknut (38 and 39). Tight­
en the locknut and bend the tabs of the lockwasher
over the locknut.
Make certain that there are no burrs or dirt on the
interior surfaces of the bearing housing (20). Heat
the bearing housing and slide the shaft and bear­
ings into the heated bearing housing. Make certain
that the bearings are pressed squarely against the
step of the housing.
When installing the shaft and bearings into
the bearing bore, push against the outer
race. Never hit the balls or ball cage.
Press the oil seal (30) into the bearing housing cap
(25) with the lip positioned as shown in Figure
E-1. Be careful not to damage the oil seal lip.
Align the words “TOP” on the bearing cap and the
bearing housing and secure the bearing cap and
to the bearing housing using the hardware (23 and
24).
Use a feeler gauge to measure the gap between
the outboard surface of the bearing housing and
the inboard surface of the bearing cap. Add .002
inch (.05 mm) to the measurement to obtain the to­
tal thickness of gaskets required.
NOTE
This gap can also be measured by inserting pieces
of solder wire between the two surfaces before the
capscrews are fully tightened. Tighten the screws,
back them off, and measure the thickness of the
crushed solder wire.
Remove the bearing cap and add the calculated
thickness of bearing cap gaskets between the
bearing cap and the bearing housing. Since the
bearing cap acts as a clamp to preload the bear­
ings, measurement of the and gaskets is critical.
Install the bearing cap gaskets (40) and the hard­
ware (23 and 24) and secure the bearing cap to the
bearing housing. Check the shaft for end play. If
end play exists, remove bearing cap gaskets until
the end play is eliminated.
Install the bearing housing O‐ring (42). Apply a
light coating of grease to the O‐ring and contacting
surfaces for ease of reassembly.
Install the oil seal (8) in the pedestal body (47) with
the lip positioned as shown in Figure E-1.
Install the same number of bearing housing shims
(41) as previously removed.
NOTE
Position the bearing housing “TOP” at the 12
o'clock position and the groove plug (51) at the 6
o'clock position.
Slide the shaft, assembled bearings and bearing
housing into the pedestal body until the inboard
bearing seats against the pedestal bore. Be care­
ful not to damage the oil seal lip. Secure the bear­
ing housing using the hardware (21 and 22).
Install the slinger ring (16) on the shaft. Using the
hardware (49 and 50), secure the pedestal assem­
bly to the intermediate (15) with “TOP” in the prop­
er position.
Install the bottle oiler and nipple (36 and 37) in the
side of the pedestal body.
Secure the pedestal to the base with the previously
removed hardware. Be sure to reinstall any leveling
shims used under the mounting feet.
Lubricate the bearings and pedestal as indicated
in LUBRICATION at the end of this section.
Impeller Back Clearance
Before the seal assembly is installed, temporarily
assemble the seal plate (57), shaft sleeve (28),