Gorman-Rupp Pumps 3D-E1.5 1P 883504 and up - Manual (Page 29)

OM-03604 D SERIES
MAINTENANCE & REPAIR PAGE E - 13
Use an arbor (or hydraulic) press to remove the
bearings (4 and 4A) from the gear housing..
It is not necessary to remove the locating pins (17)
from the gear housing unless they are bent or dam­
aged. If replacement is required, press the pins
from the housing.
Gearbox Reassembly And Installation
(Figure 4)
Inspect the shafts (26, 31 and 35) for distortion,
nicks or scratches. Dress small nicks and burrs
with a fine file or emery cloth. Replace the shaft if
defective.
NOTE
Do not heat the needle bearings (4, 4A and 32).
These bearings are designed to be pressed into the
gear housing, not onto the shafts.
To prevent damage during removal from
the shaft (26), it is recommended that the
bearings (25 and 25A) be cleaned and in­
spected in place. It is strongly recom­
mended that the bearings be replaced any
time the shaft and and bearings are re­
moved.
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.
Heat the bearings to a uniform temperature no
higher than 250
_
F (120
_
C) and slide the bearings
onto the shaft (26), one at a time, until they are fully
seated. This should be done quickly, in one con­
tinuous motion, to prevent the bearings from cool­
ing 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 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.
If removed, install the snap ring (28) in the groove
on the pinion drive shaft (26). Install the bearing
(25A) on the pinion drive shaft against the snap
ring. Install the sleeve (27). Install the bearing (25)
onto the pinion drive shaft until squarely seated
against the sleeve. Secure the bearing with the
snap ring (24). Wrap the shaft and bearings in a
clean cloth until reassembly in the bearing hous­
ing.
Install the bearing (4A) in the gear housing until it is
flush with the outer machined face of the housing.
Install a new spacer sleeve (2) through the open
bearing bore, then press the bearing (4) into the
bore until it is flush with the inner machined face on
the housing.
When installing the bearings into the bear­
ing bore, push against the outer race. Nev­
er hit the balls or ball cage.
Install the gear key (12) in the keyway in the drive
shaft (35). Press the drive gear (11) onto the drive