Gorman-Rupp Pumps 54J2-B 1424552 and up - Manual (Page 27)

OM−01337 50 SERIES
MAINTENANCE & REPAIR PAGE E − 5
Work Surface
Lathe Dog Arm
V" Notch
Shaft Key
Impeller Shaft
Lathe Dog
Setscrew
Heavy
Bar Stock
Figure 2. Loosening Impeller
The impeller bore is designed to accept a 2 inch
(50,8 mm) square block of wood or steel bar to aid
in removal of the impeller. Use an impeller wrench if
one is available. Turn the impeller counterclock-
wise (when facing the impeller). When the impeller
breaks loose, remove it from the impeller shaft. Use
caution when removing the impeller; tension on
the seal spring will be released as the impeller is re-
moved. Remove the lathe dog and shaft key.
Slide the impeller adjusting shims (44) off the shaft.
Tie and tag the shims or measure and record their
thickness for ease of reassembly.
With the impeller removed, inspect the wear ring
(6) for excessive wear or damage. If replacement is
required, remove the hardware (4 and 5) and install
5/16−18 UNC x 2−1/2 inch long jacking screws
(not supplied) in the threaded holes in the wear
ring. Tighten the jacking screws evenly (to prevent
binding) until the wear ring separates from the
pump casing.
Seal Removal and Disassembly
(Figures 1 and 4)
The seal housing (7) and seal assembly (3) must
be removed as a unit.
To remove the seal housing, disengage the hard-
ware (10 and 11) and install 3/8-16 UNC jacking
screws (not supplied) in the threaded holes in the
seal housing. Tighten the jacking screws evenly to
prevent binding and separate the seal housing
from the pump casing.
Slide the seal housing and seal assembly off the
shaft as a single unit. Remove the snap rings (43)
from the seal housing. Lay the seal housing on a
flat surface with the impeller side up and press the
seal components from the seal housing.
Remove the seal housing gasket (35).
If no further disassembly is required, refer to Seal
Reassembly.
Shaft and Bearing Removal and Disassembly
When the pump is properly operated and main-
tained, the shaft and bearings should not require
disassembly. 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.
If not removed, remove the power source and ped-
estal mounting hardware. Separate the pedestal
(16) from the power source and retain the shaft key
(25).
Remove the pedestal drain plug (30) and drain the
lubricant from the pedestal. Clean and reinstall the
drain plug.
Remove the nuts (32) and separate the pedestal
from the pump casing (1). Remove the casing gas-
ket (12).
Remove the hardware (22 and 23) securing the
bearing cap (21) and remove the cap and gasket
(20). Press the oil seal (24) from the bearing cap.
Slide the pedestal foot (27) off the pedestal. Re-
move the bearing shim set (19). Tie and tag the
shims, or measure and record their thickness for
ease of reassembly.
Place a block of wood against the impeller end of
the shaft and tap the shaft and assembled bear-