Gorman-Rupp Pumps 82D1-EX13-X 1390156 and up - Manual (Page 27)

80 SERIES OM−06106
MAINTENANCE & REPAIR PAGE E − 9
To disassemble the check valve, remove the hard-
ware securing the check valve weights to the
check valve.
If no further disassembly is required, see Suction
Check Valve Installation.
Pump Casing Removal
(Figure 1)
To service the impeller or seal assembly, discon-
nect the discharge piping. Remove the hardware
(15, 16 and 17) securing the pump casing to the roll
cage (4).
(Figure 2)
Remove the nuts (7) securing the pump casing to
the intermediate. Separate the parts by pulling the
casing straight away from the intermediate. If
shims have been used under the mounting feet to
level the pump casing, tie and tag these shims.
Remove the casing gasket set (13). Record the
thickness of the gaskets for future reference. Clean
the mating surfaces of the intermediate and pump
casing.
Inspect the wear plate assembly (14) and replace if
badly scored or worn. To remove the wear plate as-
sembly, disengage the hardware (16, 19, 20 and
21) and pull the wear plate from the pump casing.
Impeller Removal
(Figure 2)
To loosen the impeller (2), tap the vanes of the im-
peller in a counterclockwise direction (when facing
the impeller) with a block of wood or a soft-faced
mallet. Unscrew the impeller from the engine
crankshaft. Use caution when removing the impel-
ler; tension on the seal spring will be released as
the impeller is unscrewed.
Slide the impeller adjusting shims (12) off the shaft.
Tie and tag the shims or measure and record their
thickness for ease of reassembly.
Seal Removal and Disassembly
(Figures 2 and 4)
Carefully remove the spring centering washer (11)
and seal spring. Slide the shaft sleeve (9) and rotat-
ing portion of the seal off the shaft as a unit. Apply
oil to the sleeve and work it up under the bellows.
Slide the rotating portion of the seal off the sleeve.
Slide a pair of stiff wires with hooked ends along
the shaft and use them to pull the stationary seat
from the intermediate bore.
NOTE
An alternate method of removing the stationary seat
is to remove the hardware (5 and 6) and separate
the intermediate (8) from the engine. Use a wooden
dowel or other suitable tool to press the stationary
seat from the back side of the intermediate bore.
If no further disassembly is required, see Seal
Reassembly and Installation.
Seal Reassembly and Installation
(Figures 2 and 4)
Inspect the engine crankshaft for damage. Small
scratches or nicks may be removed with a fine file
or emery cloth. If excessive wear exists, the engine
shaft will have to be replaced (refer to the engine
service manual).
Clean the seal cavity and shaft with a cloth soaked
in fresh cleaning solvent.
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.
The seal is not normally reused because wear pat-
terns on the finished faces cannot be realigned
during reassembly. This could result in premature
failure. If necessary to reuse an old seal in an emer-
gency, carefully wash all metallic parts in fresh
cleaning solvent and allow to dry thoroughly.