Gorman-Rupp Pumps 84A2-4024H 1488564 and up - Manual (Page 29)

80 SERIES OM−06412
MAINTENANCE & REPAIR PAGE E − 10
peller in a counterclockwise direction (when facing
the impeller). Use caution when removing the im-
peller; tension on the seal spring will be released as
the impeller is unscrewed. Inspect the impeller and
replace it if cracked or badly worn.
Slide the impeller adjusting shims (20) off the shaft.
For ease of reassembly, tie and tag the shims or
measure and record their thickness.
Seal Removal and Disassembly
(Figure 3)
Make certain that the cross arm on the grease cup
has been turned down against the cover before re-
moving the seal assembly.
For ease of disassembly, the seal and seal plate
(36) may be removed as a single unit. Before at-
tempting to remove the seal plate, remove the seal
grease cup and piping (14, 15 and 16).
Slide the seal plate and seal parts off the shaft as a
unit. Be careful not to drop or damage any seal
parts.
Carefully remove the stationary and rotating seal
elements, packing rings, seal spring, and spacer
sleeve from the seal plate. Use a stiff wire with a
hooked end if necessary.
NOTE
An alternate method of removing the seal without
removing the seal plate is to remove the outer rotat-
ing element, and use two stiff wires with hooked
ends to pull the remaining seal parts out of the seal
plate.
Inspect the seal liner (4) for wear or grooves that
could cause leakage or damage to the seal pack-
ing rings. The seal liner is a press fit in the seal plate
(36) and does not normally require replacement. If
replacement is required, see Seal Installation.
If no further disassembly is required, refer to Seal
Installation.
Shaft And Bearing Removal And Disassembly
(Figure 3)
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.
Disengage the hardware (24 and 25), and remove
the bearing cap (23) and shims (22). Tie and tag
the bearing shims or measure and record their
thickness for ease of reassembly.
NOTE
There are no provisions for draining the grease
from the intermediate cavity. Place a drip pan under
the intermediate before removing the shaft and
bearing.
Place a block of wood against the impeller end of
the shaft (27) and tap the shaft and assembled
bearings out of the intermediate (19). Be careful
not to damage the shaft.
Remove the outboard bearing cup (28) from the
bearing cone (29).
Remove the bearing closure (33) and inboard
bearing cup (31) from the impeller shaft.
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 intermediate, shaft and all component
parts (except the bearings) with a soft cloth soaked