Gorman-Rupp Pumps 88A2-F6L 1341412 and up - Manual (Page 28)

OM−02720 80 SERIES
MAINTENANCE & REPAIR PAGE E − 9
Inspect the wear plate (35) and replace if scored or
badly worn. To remove the wear plate, disengage
the hardware (37 and 38) from the wear plate studs
(36), and pull the wear plate from the pump casing.
Impeller Removal
(Figure 2)
Make certain that the cross arm on the grease cup
has been turned down against the cover, then un-
screw the impeller from the shaft in a counterclock-
wise direction (when facing the impeller). Use cau-
tion when removing the impeller; tension on the
seal spring will be released as the impeller is un-
screwed.
Inspect the impeller and replace it if cracked or
badly worn. Slide the impeller adjusting shims (57)
off the shaft. For ease of reassembly, tie and tag the
shims or measure and record their thickness.
Seal Removal
(Figure 2)
For ease of disassembly, the seal and seal plate
(14) may be removed as a single unit. Before at-
tempting to remove the seal plate, remove the au-
tomatic grease cup and piping (15, 17 and 18).
Slide the seal washer (58) off the shaft. Remove the
outer rotating element. Slide the seal plate, spacer
sleeve and remaining seal parts off the shaft as a
unit.
Carefully remove the outer stationary seat, rotating
element, packing ring, seal washer and seal spring
from the seal plate. Remove the spacer sleeve, in-
ner seal washer, packing ring, stationary seat and
rotating element. Use a stiff wire with a hooked end
if necessary.
Inspect the seal liner (59) for wear or grooves that
could cause leakage or damage to the seal pack-
ing rings. The seal liner is secured by a press fit into
the seal plate and does not normally require re-
placement. If replacement is required, see Seal In-
stallation.
If no further disassembly is required, refer to Seal
Installation.
Shaft and Bearing Removal and Disassembly
(Figure 2)
When the pump is properly operated and main-
tained, the intermediate should not require disas-
sembly. 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 (26) and shims (21). Tie and tag
the bearing shims, or measure and record their
thickness for ease of reassembly.
Remove the outboard bearing cup (27) from the
bearing cone (28).
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
bearings.
Place a block of wood against the impeller end of
the shaft (23) and tap the shaft and assembled
bearings from the intermediate. Be careful not to
damage the shaft.
Use a suitably sized dowel and an arbor (or hy-
draulic) press to remove the bearing closure (32)
and inboard bearing cup (30) from the intermedi-
ate.
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.