Gorman-Rupp Pumps 82E2-B 717191 and up - Manual (Page 24)

OM−00843 80 SERIES
MAINTENANCE & REPAIR PAGE E − 5
Do not attempt to lift the complete pump
unit using the lifting eye. It is designed
to facilitate removal or installation of in-
dividual components only. Additional
weight may result in damage to the
pump or failure of the eye bolt.
Remove the gasket set (19) from the pedestal and
seal plate. Tie and tag the gaskets, or measure and
record their thickness for ease of reassembly. Tie
and tag any leveling shims used under the casing
mounting feet to ease reassembly.
Inspect the wear plate assembly and replace it if
badly scored or worn. To remove the wear plate as-
sembly, remove the capscrew (25) and fiber wash-
er (26) just below the suction port. Reach through
the suction port and disengage the hardware (37
and 38) from the wear plate. Tap the wear plate as-
sembly free of the casing.
Impeller Removal
Before removing the impeller, turn the cross arm on
the automatic grease cup (8) clockwise until it rest
against the cover (see Figure 4). This will prevent
the grease from escaping when the impeller is re-
moved. Remove the grease cup and piping (43, 44
and 45).
Immobilize the impeller by wedging a block of
wood between the vanes. Remove the hardware
(20, 22 and 23) securing the impeller to the shaft. If
removed, install the shaft key (8). Install a lathe dog
on the drive end of the shaft (9) with the V" notch
positioned over the shaft keyway.
With the impeller rotation still blocked, strike the
lathe dog sharply in a counterclockwise direction
(when facing the drive end of the shaft). The impel-
ler may also be loosened by using a long piece of
heavy bar stock to pry against the arm of the lathe
dog in a counterclockwise direction (when facing
the drive end of the shaft) as shown in Figure 2.
Use caution not to damage the shaft or keyway.
When the impeller breaks loose, remove the lathe
dog and wood block and unscrew the impeller
from the shaft.
Turn
Counterclockwise
Lathe Dog Arm
V" Notch
Shaft Key
Impeller Shaft
Lathe Dog
Setscrew
Heavy
Bar Stock
Figure 2. Loosening Impeller
Unscrew the impeller from the shaft. Use caution
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 (50)
off the impeller shaft. Tie and tag the shims, or
measure and record their thickness for ease of
reassembly.
Seal Removal and Disassembly
(Figures 1 or 3)
Carefully remove the outer rotating and stationary
seal elements, packing ring, stationary washer,
seal spring and shaft sleeve from the seal plate.
Use a stiff wire with a hooked end to remove the in-
board stationary washer, packing ring, stationary
and rotating seal elements.
Inspect the seal liner (51) for wear or grooves
which could cause leakage or damage to the seal
packing rings. The seal liner is a press fit in the seal
plate and does not normally require replacement.
If replacement is necessary, disengage the hard-
ware (9 and 10) and separate the seal plate from
the engine. See Seal Reassembly And Installa-
tion for seal liner replacement.
If no further disassembly is required, see Seal
Reassembly and Installation.