Gorman-Rupp Pumps PA4A60C-B-E30 575/3 1482736 and up - Manual (Page 45)

PA SERIES OM−06440
MAINTENANCE & REPAIR PAGE E − 18
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 (22) to the shaft with
the snap ring (21).
Apply a light coating of oil to the lip of the inboard oil
seal (6A) and press it into the bearing housing bore
with the lip positioned as shown in Figure 4. Press
the oil seal into the housing until the face is just
flush with the machined surface on the housing.
It is recommended that a sleeve be positioned
against the inboard oil seal to prevent the lip of the
oil seal from rolling as the shaft and bearings are
installed in the bearing housing. The O.D. of the
sleeve should be just smaller than the bearing
housing bore, while the I.D. of the sleeve should be
just larger than the O.D. of the lip seal area of the
shaft.
With the lip seal sleeve in place, lubricate the lip
seal area of the shaft and slide the shaft and as-
sembled bearings into the bearing housing until
the retaining ring on the outboard bearing seats
against the bearing housing. Remove the lip seal
sleeve.
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 oil to the lip of the outboard
oil seal (6) and press it into thebearing housing with
the lip positioned as shown in Figure 4. Press the
oil seal into the housing until the face is just flush
with the machined surface on the housing.
Apply a light coating of oil to the lip of the oil seal
(6A) and press it into the mounting flange (18) with
the lip positioned as shown in Figure 4. Press the
oil seal into the housing until the face is just flush
with the outer face of the mounting flange.
Install the drive flange gasket (19) and secure the
drive flange to the bearing housing with the hard-
ware (16 and 17). Be careful not to damage the lip
of the oil seal (6A) on the shaft keyway. Torque the
capscrews (16) to 40 ft. lbs. (480 in. lbs. or 5,5 m.
kg.).
Lubricate a new bearing housing O-ring (29) with
grease and install it in the groove in the bearing
housing.
Lubricate the bearings as indicated in LUBRICA-
TION at the end of this section.
Seal Reassembly and Installation
(Figures 5 and 10)
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.
Clean the seal cavity and shaft with a cloth soaked
in fresh cleaning solvent. Inspect the stationary
seat bore in the seal plate for dirt, nicks and burrs,
and remove any that exist. The stationary seat bore
must be completely clean before installing the
seal.
A new seal assembly should be installed
any time the old seal is removed from the
pump. Wear patterns on the finished faces
cannot be realigned during reassembly.
Reusing an old seal could result in prema-
ture failure.
The seal is not normally reused because wear pat-
terns on the finished faces cannot be realigned
during reassembly. This could result in premature
failure. If necessary to reuse an old seal in an emer-