Gorman-Rupp Pumps PAH6B60-6068H IT4 1529202 and up - Manual (Page 43)

PAH SERIES OM-06602
MAINTENANCE & REPAIR PAGE E - 20
Remove the impeller adjusting shims (5); tie and
tag the shims, or measure and record their thick­
ness for ease of reassembly.
Inspect the impeller and replace if cracked or badly
worn.
Seal Removal
(Figures 6 and 10)
Remove the spring centering washer and seal
spring. Slide the shaft sleeve (7) and rotating por­
tion 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 shaft sleeve. Remove the shaft sleeve
O‐ring (8).
Use a pair of stiff wires with hooked ends to remove
the stationary element from the seal plate bore.
An alternate method of removing the stationary
seal components is to remove the hardware (15
and 16) and separate the seal plate and gasket
(14) from the pedestal (17). Position the seal plate
on a flat surface with the impeller side down. Use a
wooden dowel or other suitable tool to press on the
back side of the stationary element until the ele­
ment and its O‐ring can be removed.
If no further disassembly is required, refer to Seal
Installation.
Separating Pedestal and Drive Assembly
From Engine
(Figure 9)
Support the pedestal using a hoist and sling and
remove the hardware (6, 7 and 9) securing the
drive flange (20, Figure 6) to the engine bellhou­
sing. Separate the assemblies by pulling the ped­
estal straight away from the engine.
As the assemblies separate, the flexible portion of
the coupling assembly (3) will remain on the shaft.
To remove the coupling from the shaft, unscrew the
two allen head setscrews from the bushing (2).
Screw one of the setscrews into the puller hole on
the circumference of the bushing. As the coupling
and bushing separate, remove the bushing, and
slide the coupling off the shaft. Remove the shaft
key (28, Figure 6).
It is not necessary to remove the outer ring of the
coupling from the engine flywheel unless the cou­
pling must be replaced. To remove the ring, disen­
gage the hardware (4 and 5) securing it to the fly­
wheel.
Move the pump end to a clean, well equipped shop
area for further disassembly.
Shaft and Bearing Removal and Disassembly
(Figure 6)
When the pump is properly operated and main­
tained, the bearing housing should not require dis­
assembly. 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 bearing housing drain plug (18A) and
drain the lubricant. Clean and reinstall the drain
plug.
If not removed with the seal assembly, remove the
hardware (15 and 16) and separate the seal plate
and gasket (14) from the pedestal (17).
Disengage the hardware (15 and 16) and remove
the drive flange (20), gasket (21) and oil seal (19).
Press the oil seal from the drive flange.
Place a block of wood against the impeller end of
the shaft (25) and tap the shaft and assembled
bearings (24 and 27) from the bearing housing.
Press the oil seals (11) 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