Gorman-Rupp Pumps 03A20-B 751140 and up - Manual (Page 24)

OM-01175 0 SERIES
MAINTENANCE & REPAIR PAGE E - 5
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
Before attempting to remove the impeller, remove
the bottle oiler and piping (12, 13 and 14) to pre­
vent the seal lubricant from escaping when the im­
peller is removed.
Immobilize the impeller by inserting a bar between
the impeller vanes, being careful not to damage
the vanes. Disengage the hardware (39, 41 and
42). Remove the bar from the impeller.
Position two wedges opposite each other behind
the impeller, and tap the wedges carefully in turn
until the impeller comes free of the shaft. When the
impeller comes free, remove the wedges and finish
pulling the impeller from the shaft. Use caution
when removing the impeller; tension on the seal
spring will be released as the impeller is removed.
Retain the impeller key (38).
Remove the impeller adjusting shims (53). Tie and
tag the shims or measure and record their thick­
ness for ease of reassembly.
Seal Removal and Disassembly
(Figures 1 and 2)
Remove the spring retainer and seal spring. Lubri­
cate the seal area of the shaft and work oil up under
the bellows. Slide the rotating portion of the seal off
the shaft as a unit.
Remove the hardware (36 and 37) and slide the
seal plate and stationary portion of the seal off the
impeller shaft (31) as a unit. Press the stationary
seal element and O‐ring out of the seal plate from
the back side.
Pry or press the oil seal (15) out of the seal plate.
Shaft And Bearing Removal And Disassembly
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.
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 pedestal drain plug (32) and drain the
lubricant. Clean and reinstall the drain plug.
Remove the slinger ring (16). Disengage the hard­
ware (17 and 18) and slide the assembled bearing
cap (19) and oil seal (20) off the shaft. Press the oil
seal from the bearing cap.
Disengage the hardware (25 and 26) and slide the
assembled bearing cap (27) and oil seal (29) off the
shaft. Tie and tag bearing gasket/shim set (24) for
ease of reassembly. Press the oil seal from the
bearing cap.
Place a block of wood against the impeller end of
the shaft and tap the shaft and assembled bear­
ings (23 and 35) from the bearing housing.
After removing the shaft and bearings, clean and
inspect the bearings in place as follows.
To prevent damage during removal from
the shaft, it is recommended that bearings
be cleaned and inspected in place. It is
strongly recommended that the bearings
be replaced any time the shaft and bear­
ings are removed.
Clean the bearing housing, shaft and all compo­
nent parts (except the bearings) with a soft cloth
soaked in cleaning solvent. Inspect the parts for
wear or damage and replace as necessary.