Gorman-Rupp Pumps 06D17-GAR 708768 thru 1000782 - Manual (Page 31)

OM−01274 0 SERIES
MAINTENANCE & REPAIR PAGE E − 11
oil and the container must be absolutely clean. If
the oil has been previously used, it must be thor-
oughly filtered.
Position the intermediate (31) over the shaft (46)
before installing the inboard pinion shaft bearing
(35) as described below.
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.
Position the gearbox housing on a flat surface with
the pump side up and support it so it is level and
stable. Install the gasket (34) and slide the as-
sembled pinion shaft, intermediate and bearings
into the gearbox housing until the gear teeth mesh
with those of the helical gear. Slide the intermediate
into the gearbox housing until fully seated.
Continue to slide the pinion shaft and bearing into
the gearbox until the inboard bearing (25) is fully
seated.
NOTE
Pinion shaft endplay should be between .005 and
.012 inch (0,127 to 0,305 mm). Install the same
thickness of bearing shims (36) as previously re-
moved, then reinstall the pump casing (1) as de-
scribed in PUMP AND SEAL REASSEMBLY. Add or
remove bearing shims to achieve the correct
endplay.
Position the gearbox housing on the bed of an ar-
bor (or hydraulic) press with the pump side down,
and support it so it is level and stable. Lubricate the
inboard drive shaft bearing (28) and slide it into the
gearbox housing bore until fully seated.
Install the woodruff key (17) in the shaft keyway.
Position the helical gear (16) in the gearbox so the
teeth align with those on the pinion shaft and it is
seated against the inboard bearing. Slide the drive
shaft and assembled outboard 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 (14
and 18) and secure with the capscrews (8).
Apply a light coating of oil to the lip of the oil seal
(24), and press it into the bearing cap (21) 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 (18) and 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 (20).
Reinstall the pipe plug (27) in the gearbox 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
The seal assembly is lubricated by the medium be-
ing pumped and no additional lubrication is re-
quired.