Gorman-Rupp Pumps 03H1-GR 287634 and up - Manual (Page 32)

0 SERIES OM-01194
MAINTENANCE & REPAIR PAGE E - 12
oil and the container must be absolutely clean. If
the oil has been previously used, it must be thor­
oughly filtered.
Heat the bearings to a uniform temperature no
higher than 250
_
F (120
_
C) and slide them onto the
shafts, one at a time, until they are fully seated. This
should be done quickly, in one continuous motion,
to prevent the bearings from cooling and sticking
on the shaft.
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
out of position in shrinking. If movement has oc­
curred, use a suitably sized sleeve and a press to
reposition the bearings.
If heating the bearings is not practical, use a suit­
ably sized sleeve and an arbor (or hydraulic) press
to install the bearings onto the shafts.
When installing the bearings onto the
shafts, never press or hit against the outer
race, balls, or ball cage. Press only on the
inner race.
With the bearings, helical gear and spacer in­
stalled on the drive and pinion shafts, mesh the
teeth on the helical drive gear with those on the pin­
ion shaft, and slide both shafts into the gear hous­
ing (25) until the outboard bearings are seated in
the bearing bores of the gear housing.
If the oil seal (3) was removed, apply a light coating
of oil to the lip of the replacement seal, and position
it in the seal plate (27) with the lip positioned as
shown in Figure 2. Press the oil seal into the seal
plate until the inner side of the seal is just flush with
the inside of the seal plate.
Install the seal plate gasket (26) and slide the seal
plate over the inboard bearings. Install the cap­
screws (28) to align the gearbox halves. Use a
hammer and punch to tap the dowel pins (31) into
the alignment holes in the gear housing (25) until
flush. Use the remaining hardware (29 and 30) to
secure the seal plate to the gear housing.
If the oil seal (12) was removed, apply a light coat­
ing of oil to the lip of the replacement seal, and po­
sition it in the cover plate (9) with the lip positioned
as shown in Figure 2. Press the oil seal into the cov­
er plate until the inner side of the seal is just flush
with the inside of the cover plate.
Position the cover plate gasket (9) against the gear
housing. Install the same thickness of bearing ad­
justing shims (13 and 17) as previously removed,
and slide the cover plate over the drive shaft.
Use caution not to damage the oil seal lip
on the shaft keyway when installing the
cover plate.
Secure the cover plate to the gear housing with the
hardware (19 and 20).
NOTE
End play for both the drive and pinion shafts should
be between .005 to.012 (0,127 to 0,305 mm). Add
or remove bearing shims to achieve the correct
endplay.
When the shaft end play has been correctly estab­
lished, remove the bottom three capscrews
(20),
coat the threads with thread compound, and rein­
stall them in the gear housing.
Refer to PUMP AND SEAL REASSEMBLY and in­
stall the remaining pump components. After the
pump components are installed, lubricate the
gearbox as indicated in LUBRICATION.
LUBRICATION
Seal Assembly
(Figure 1)
The seal assembly is lubricated by the medium be­
ing pumped and no additional lubrication is re­
quired.