Gorman-Rupp Pumps 612M60-B 1453214 and up - Manual (Page 25)

60 SERIES OM−04407
MAINTENANCE & REPAIR PAGE E − 6
NOTE
When removing the pump casing, use a wire to se-
cure the assembled bottle oiler (60) and bracket
(63) above the level of the oil in the seal cavity. This
will prevent oil from leaking out of the oiler during
disassembly.
If the impeller (2) is to be removed, the impeller
screw (41) should be loosened before removing
the pump casing. Immobilize the impeller by insert-
ing a wood block through the pump discharge and
into the impeller vanes. Remove the impeller screw
and washer (40). Remove the wood block from the
pump discharge.
Remove the hardware (11, 12, 58 and 59) securing
the pump casing and bottle oiler bracket (63) to the
pedestal.
Pull the pump casing straight away from the ped-
estal to prevent binding on the impeller. Remove
the casing gasket (9) and clean the contacting sur-
faces.
Impeller Removal
Before removing the impeller, loosen the hose
clamp (66) and remove the hose (65) from the con-
nector (64). Remove the bottle oiler (60) and brack-
et assembly and drain the seal cavity. This will pre-
vent oil from escaping when the impeller is re-
moved.
With the impeller screw and washer (40 and 41) re-
moved as described in Pump Casing Removal,
insert a pair of wedges 180
_ apart between the im-
peller and the seal plate. Tap the wedges alternate-
ly to force the impeller off the shaft. Retain the im-
peller key (42).
Inspect the wear ring (4) for excessive wear or
scoring.
Proper replacement of the wear ring (4) re-
quires machining and dynamic balancing
the impeller assembly after the wear ring is
welded to the impeller. Failure to properly
install the wear ring and machine and bal-
ance the impeller assembly can result in
premature shaft, seal or bearing failure, or
other damage to the pump.
To replace the wear ring, grind off the three weld
spots securing the wear ring to the impeller. Use
caution not to damage the impeller. Pry or carefully
grind the wear ring off the impeller.
Seal Removal
This pump is designed with two seals; a primary
mechanical seal (5) located directly behind the im-
peller and a secondary oil seal (36) located in the
seal plate cover (51). If the liquid being pumped
leaks past the oil seal, both seals should be re-
placed immediately.
Remove the impeller shims (6). Tie and tag the
shims for ease of reassembly. Remove the seal
spring. Slide the rotating portion of the seal (con-
sisting of the shaft sleeve and O-ring, bellows and
retainer, and rotating element) off the shaft as a
unit.
Remove the rotating element. Apply oil to the
sleeve and work it up under the rubber bellows.
Slide the bellows and retainer off the sleeve. Re-
move the sleeve O-ring.
Remove the air vent and piping (54, 55 and 56) and
slide the seal plate and remaining seal compo-
nents off the shaft. Disengage the hardware (52
and 53) and separate the seal plate cover and O-
ring (51) from the seal plate.
Use a suitably sized dowel to press the stationary
portion of the seal out of the seal plate. Press the oil
seal out of the seal plate cover.
If no further disassembly is required, refer to Seal
Installation.
Pedestal Assembly Removal
Remove the hardware securing the pedestal to the
base. Use a suitable hoist and sling to move the
pedestal assembly to a clean, well equipped work-
shop for further disassembly.