Gorman-Rupp Pumps 14A22-B 1064248 and up - Manual (Page 28)

OM-00661 10 SERIES
MAINTENANCE & REPAIR PAGE E - 5
rate the check valve assembly from the check valve
seat.
Inspect the check valve parts for wear or damage.
If replacement is required, remove the hardware
(62 and 63), and separate the check valve gasket
(66), check valve arm (67) and weights (64 and 65).
If no further disassembly is required, see Suction
Check Valve Installation.
Back Cover Removal
The wear plate (46) is easily accessible and may be
serviced by removing the back cover assembly
(53). Loosen the clamp bar screw (51) and remove
the clamp bar (52). Pull the back cover and wear
plate from the pump casing. Remove the back cov­
er gasket (50). Clean the mating surfaces of the
back cover plate and pump casing.
Inspect the wear plate and replace it if badly scored
or worn. To remove the wear plate, disengage the
hardware (47 and 48) securing it to the back cover.
If no further disassembly is required, see Back
Cover Installation.
Pump Casing Removal
To service the impeller or seal assembly, discon­
nect the discharge piping. Remove the hardware
securing the pump to the base and disconnect the
power source. Tie and tag any leveling shims used
under the mounting feet to ease reassembly.
Remove the nuts (41), and separate the pump cas­
ing and gasket set (43) from the seal plate (42) and
pedestal (19). Clean the mating surfaces of the
seal plate and pump casing. Tie and tag the gas­
kets, or measure and record their thickness for
ease of reassembly.
Impeller Removal
Before removing the impeller, remove the bottle
oiler and piping (12, 13 and 14). Remove the seal
drain plug (39) and drain the oil from the seal cavity
to prevent the oil from escaping when the impeller
is removed. Clean and reinstall the drain plug.
Immobilize the impeller by wedging a block wood
between the vanes. If removed, install the shaft key
(27). Install a lathe dog on the drive end of the shaft
(17) with the “V” notch positioned over the shaft
keyway. Remove the impeller capscrew and wash­
er (44 and 45).
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 (73)
off the impeller shaft. Tie and tag the shims or mea­
sure and record their thickness for ease of reas­
sembly.
Seal Removal and Disassembly
Remove the spring centering washer and seal
spring. Slide the shaft sleeve (72) and rotating por­
tion of the seal off the shaft as a single unit. Apply oil