Gorman-Rupp Pumps 04C3-B 407671 and up - Manual (Page 25)

OM-01218 0 SERIES
MAINTENANCE & REPAIR PAGE E - 5
the pump or component only as high as
necessary and keep personnel away
from suspended objects.
Tie and tag any leveling shims used under the cas­
ing feet to ease reassembly.
Inspect the wear ring (29) for excessive wear or
scoring. The wear ring is secured in the pump cas­
ing by a press fit. If replacement is required, use a
small bit to drill two holes through the ring horizon­
tally, 180
_ apart. Use a saw or chisel to complete
the cuts through the ring, and remove it from the
pump casing. Use caution not to damage the
pump casing bore when removing the wear ring.
Use caution not to damage the pump cas­
ing bore when removing the wear ring.
Impeller Removal
Immobilize the impeller by inserting a bar between
the impeller vanes, being careful not to damage
the vanes. Disengage the hardware (26, 27 and
28). Remove the bar from the impeller.
Install 3/8-16 UNC by 4‐inch long capscrews in
the tapped holes in the impeller. Use the caps­
crews and a suitable puller to remove the impeller
from the shaft. Use caution when removing the im­
peller; tension on the seal spring will be released as
the impeller is removed. Retain the impeller key
(25).
Remove the impeller adjusting shims (37). Tie and
tag the shims or measure and record their thick­
ness for ease of reassembly.
Seal Removal and Disassembly
(Figures 1 and 3)
Remove the spring holder (38) and seal spring.
Slide the shaft sleeve (36) and rotating portion of
the seal off the shaft as a unit.
Apply oil to the sleeve and work it up under the rub­
ber bellows. Slide the rotating portion of the seal off
the shaft sleeve.
Slide the seal plate and stationary seat off the im­
peller shaft as a unit. Press the stationary seal seat
and O‐ring out of the seal plate from the back side.
Inspect the wear ring (12) for excessive wear or
damage. The wear ring is secured in the seal plate
by a press fit. If replacement is required, use a
small bit to drill two holes through the ring horizon­
tally, 180
_ apart. Use a saw or chisel to complete
the cuts through the ring, and remove it from the
seal plate. Use caution not to damage the seal
plate bore when removing the wear ring.
Use caution not to damage the seal plate
bore when removing the wear ring.
Shaft And Bearing Removal And Disassembly
Shaft and bearing disassembly in the field
is not recommended. These operations
should be performed only in a properly
equipped shop by qualified personnel.
When the pump is properly operated and main­
tained, the pedestal should not require disassem­
bly. Disassemble the shaft and bearings only
when there is evidence of wear or damage.
NOTE
There are no provisions for draining the grease
from the pedestal cavity. Place a drip pan under the
pedestal before removing the shaft and bearing.
Remove the slinger ring (14). Disengage the hard­
ware (20 and 21) and slide the bearing cap (19) off
the shaft. Remove the bearing shim set (18).
Place a block of wood against the impeller end of
the shaft and tap the shaft (23) and assembled
bearings (15 and 17) from the pedestal.
After removing the shaft and bearings, clean and
inspect the bearings in place as follows.