Gorman-Rupp Pumps 04B52-B 1346496 and up - Manual (Page 24)

OM-01232 0 SERIES
MAINTENANCE & REPAIR PAGE E - 5
Use caution not to damage the pump cas­
ing bore when removing the wear ring.
Inspect the wear ring (44) 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.
Impeller Removal
Immobilize the impeller (2) by inserting a bar be­
tween the impeller vanes, being careful not to dam­
age the vanes. Disengage the hardware (41, 42
and 43). 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
(54).
Remove the impeller adjusting shims (12). 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 centering washer (59) and seal
spring.
Slide the shaft sleeve (40) and rotating portion of
the seal off the shaft as a unit. Apply oil to the shaft
sleeve and work it up under the rubber bellows.
Slide the rotating portion of the seal off the sleeve.
Remove the round head machine screws (10) and
slide the seal plate and stationary seal seat off the
impeller shaft as a unit. Press the stationary seat
out of the seal plate from the back side.
Use caution not to damage the seal plate
bore when removing the wear ring.
Inspect the wear ring (11) 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.
Shaft and Bearing Removal and Disassembly
When the pump is properly operated and main­
tained, the shaft and bearing should not require
disassembly. Disassemble the shaft and bearing
only when there is evidence of wear or damage.
Shaft and bearing disassembly in the field
is not recommended. These operations
should be performed only in a properly
equipped shop by qualified personnel.
Remove the slinger ring (36) from the impeller
shaft. Disengage the capscrews (13 and 23) and
remove the bearing caps (22 and 35) and gaskets
(21 and 34) from the pedestal.
Inspect the lip seals (14 and 24) and, if replace­
ment is required, press them out of the bearing
caps.
Remove the bearing adjusting shims (29). Tie and
tag the shims or measure and record their thick­
ness for ease of reassembly.
Place a block of wood against the impeller end of
the shaft (26) and tap the shaft and bearings (15
and 20) from the bearing bore.
After removing the shaft and bearings, clean and
inspect the bearings in place as follows.
To prevent damage during removal from