Gorman-Rupp Pumps 04E1-GA 1171927 and up - Manual (Page 31)

OM−03745 0 SERIES
MAINTENANCE & REPAIR PAGE E − 11
oven, or hot plate may be used to heat the bear-
ings. Bearings should never be heated with a di-
rect 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 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 suitable sized sleeve and a press to
reposition the bearings.
If heating the bearings is not practical, use a suit-
able 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.
Lay the gearbox housing on the bed of an arbor (or
hydraulic) press with the pump side down, and
support it so it is level and stable. Lubricate the in-
board drive shaft bearing (30) and slide it into the
gearbox housing bore until fully seated.
Install the woodruff key (18) in the shaft keyway.
Position the helical gear (15) against the inboard
bearing. Slide the drive shaft and assembled out-
board bearing into the gearbox housing. Align the
woodruff key with the gear keyway, and slide the
gear onto the shaft. Press the drive shaft into the
inboard bearing until fully seated. Install the cover
plate and gasket (16 and 17) and secure with the
capscrews (5).
Apply a light coating of oil to the lip of the oil seal
(26), and press it into the bearing cap (23) with the
lip positioned as shown in Figure 1. The face of the
oil seal should be just flush with the outer face of
the bearing cap.
Install the bearing cap gasket (19) and the same
thickness of shims (27) as removed at disassem-
bly. Slide the bearing cap over the shaft, being
careful not to damage or roll the oil seal lip. Secure
the bearing cap with the nuts (21).
NOTE
Drive shaft endplay should be .005 to .012 inch
(0,127 to 0,305 mm). Add or remove bearing shims
(27) to achieve the correct endplay.
Position the bearing housing on a flat surface with
the pump side up, and support it so it is level and
stable.
Slide the pinion shaft into the gearbox housing until
the gear teeth mesh with those of the helical gear,
and the outboard bearing (31) seats squarely
against the bearing bore.
Reinstall the pipe plug (29) in the gearbox housing.
Refer to PUMP AND SEAL REASSEMBLY and in-
stall the remaining pump components.
NOTE
Pinion shaft endplay should be between .005
to.012 (0,127 to 0,305 mm). Add or remove bearing
shims (34) to achieve the correct endplay.
After the pump components are installed, lubricate
the gearbox as indicated in LUBRICATION.