Gorman-Rupp Pumps 112G60-B 1214462 and up - Manual (Page 31)

10 SERIES OM−05174
MAINTENANCE & REPAIR PAGE E − 8
the bearing bore, push against the outer
race. Never hit the balls or ball cage.
Press the oil seal (45) into the bearing housing cap
(38) 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
bearing gaskets/shims (55) to the bearing housing
using the hardware (36 and 37).
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/shims between
the bearing cap and the bearing housing. Since
the bearing cap acts as a clamp to preload the
bearings, measurement of the gaskets is critical.
Install the bearing cap gaskets (55) and the hard-
ware (36 and 37) 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 (57). Apply a
light coating of grease to the O-ring and contacting
surfaces for ease of reassembly.
Install the oil seal (20) in the pedestal body (62)
with the lip positioned as shown in Figure E−1.
Install the same number of bearing housing shims
(56) as previously removed.
NOTE
Position the bearing housing TOP" at the 12
o’clock position and the groove plug (66) 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 (34 and 35).
Install the slinger ring (29) on the shaft. Using the
hardware (64 and 65), secure the pedestal assem-
bly to the intermediate (28) with TOP" in the prop-
er position. Secure the pedestal foot (63) to the in-
termediate bracket using the hardware (59, 60 and
61). Be sure to reinstall any leveling shims used un-
der the pedestal feet.
Install the bottle oiler and nipple (51 and 52) in the
side of the pedestal body.
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 (72), shaft sleeve (41),
centering washer (39), and impeller onto the shaft.
A clearance of .010 to .020 inch (0,25 to 0,51 mm) is
required between the impeller and seal plate to
achieve maximum pump efficiency. Adjust the
back clearance by adding bearing housing shims
(56) until the impeller scrapes against the seal
plate when the shaft is turned. After the impeller
scrapes, subtract .015 inch (0,38 mm) of bearing
housing shims. Disassemble the impeller, washer,
sleeve and seal plate and proceed with Seal Reas-
sembly.
Seal Reassembly and Installation
(Figures E−1 and E−3)
Clean the seal cavity and shaft with a cloth soaked
in fresh cleaning solvent.
Most cleaning solvents are toxic and
flammable. Use them only in a well ven-
tilated area free from excessive heat,
sparks, and flame. Read and follow all
precautions printed on solvent contain-
ers.
Inspect the impeller shaft for damage. Small
scratches or nicks may be removed with a fine file