Gorman-Rupp Pumps PAV3A60C-B 1511107 and up - Manual (Page 33)

OM-06525 PA SERIES
MAINTENANCE & REPAIR PAGE E - 13
Separating Rotating Assembly From Driver
(Figures 1, 2 and 3)
The rotating assembly must be separated from the
driver before further disassembly.
Support the rotating assembly using a hoist and
sling. Disengage the coupling from the driver and
remove the coupling components and drive key
from the impeller shaft.
See Figure 2 and remove the air compressor drive
belt (27). Remove the hardware securing the drive
flange (10, Figure 3) to the flange support (50, Fig­
ure 1) and move the rotating assembly to a clean,
well equipped shop area for further disassembly.
Loosen the setscrews in the bushing (44) and slide
the sprocket (43), bushing and key (45) off the
shaft.
Shaft and Bearing Removal and Disassembly
(Figure 5)
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 (16A) and
drain the lubricant. Clean and reinstall the drain
plug.
Disengage the hardware (8 and 11) and remove
the mounting flange (20), gasket (9) and oil seal
(6B). Press the oil seal from the mounting flange.
Disengage the hardware (8 and 12) and pull the lip
seal holder (7) out of the bearing housing (1). Re­
move the O‐rings (29 and 30) from the shoulders
on the seal holder. Pry or press the oil seals (6 and
6A) from the seal holder.
Place a block of wood against the impeller end of
the shaft (3) and tap the shaft and assembled bear­
ings (5 and 33) 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.
Most cleaning solvents are toxic and
flammable. Use them only in a well ven­
tilated area free from excessive heat,
sparks, and flame. Read and follow all
precautions printed on solvent contain­
ers.
Clean the bearings thoroughly in fresh cleaning
solvent. Dry the bearings with filtered compressed
air and coat with light oil.
Bearings must be kept free of all dirt and
foreign material. Failure to do so will great­
ly shorten bearing life. Do not spin dry
bearings. This may scratch the balls or
races and cause premature bearing fail­
ure.
Rotate the bearings by hand to check for rough­
ness or binding and inspect the bearing balls. If ro­
tation is rough or the bearing balls are discolored,
replace the bearings.
The bearing tolerances provide a tight press fit
onto the shaft and a snug slip fit into the bearing