Gorman-Rupp Pumps 112D60-B 1288322 and up - Manual (Page 28)

OM−01830 10 SERIES
MAINTENANCE & REPAIR PAGE E − 5
a hoist. Support the suction elbow using a suitable
hoist and sling. The hoist is used to support the
suction elbow only, do not try to lift the pump. Re-
move the hardware securing the elbow support
(68) and pedestal foot (58) to the base.
Do not attempt to lift the complete pump
using the lifting eye. It is designed to fa-
cilitate removal or installation of individ-
ual components only. Additional weight
could cause damage to the pump or fail-
ure of the eye bolt, resulting in possible
serious personnel injury.
Remove the hardware (12, 13, 60 and 61) securing
the suction elbow to the pump casing (1). Use the
jacking screws (67) to force the suction head out of
the pump casing. Tie and tag any leveling shims
used under the supports (58 and 68) to ease reas-
sembly.
Inspect the wear plate and O-ring (57) for damage
or wear. If the wear plate must be replaced, remove
the hardware (63 and 64) from the wear plate studs
(62). Loosen the jam nuts (11) and use the adjust-
ing screws (10) to press the wear plate from the
suction elbow. If replacement is required, remove
the O-rings (57 and 65) from the wear plate.
Impeller Removal
Before attempting to remove the impeller, immobi-
lize the impeller by wedging a block of wood be-
tween the vanes and the pump casing. Remove
the impeller capscrew, washer and roll pin (77, 78
and 79). Remove the wood block and install two
3/8−16 UNC−2B capscrews (not supplied) in the
tapped holes in the impeller hub. Use a suitable
puller to remove the impeller from the shaft (43).
Retain the impeller key (80).
Remove the impeller adjusting shims (not shown).
For ease of reassembly, tie and tag the shims or
measure and record thickness.
Seal Removal and Disassembly
NOTE
There is an air filled cavity with an open drain hole
toward the bottom of the pedestal directly behind
the seal plate (55). If oil escapes from the drain
hole, the seal plate O-ring (52) has failed and re-
moval of the seal plate is required. The drain hole is
tapped, but do not install a pipe plug in the drain
hole..
(Figures E−1 and E−3)
Before removing the seal, disconnect the hose (35)
from the connector (34) and plug the tube to stop
the flow of oil from the bottle oiler (39). Remove the
connector (34) and allow the seal cavity to drain.
NOTE
The oil will not drain below the hole for the connec-
tor. To drain the remaining oil from the seal cavity,
remove one of the pipe plugs (32) and drain the re-
maining oil into a pan.
Remove the seal spring. Slide the shaft sleeve (30)
and rotating portion of the seal off the shaft as a
unit. Remove the shaft sleeve O-ring. Apply oil to
the sleeve and work it up under the bellows. Slide
the rotating portion of the seal off the shaft sleeve.
Use a pair of stiff wires with hooked ends to remove
the stationary element, seat and O-rings from the
seal plate.
Clean the seal cavity and shaft with a soft cloth
soaked in cleaning solvent.
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.
If no further disassembly is required, see Seal
Reassembly and Installation.
Pump Disassembly
Remove the discharge piping. If disassembly is re-
quired, remove the hardware (15, 16 and 17) se-