Gorman-Rupp Pumps 82D1-1B20-X 1460627 and up - Manual (Page 25)

OM−06362 80 SERIES
MAINTENANCE & REPAIR PAGE E − 7
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
(11, 14, 15 and 16) securing the pump casing to
the rollover base (17).
(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 (14). Record the
thickness of the gaskets for future reference. Clean
the mating surfaces of the intermediate and pump
casing.
Inspect the wear plate assembly (15) and replace if
badly scored or worn. To remove the wear plate as-
sembly, disengage the hardware (20, 21, 24 and
25) 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 and replace it if
cracked or badly worn. Use caution when remov-
ing the impeller; tension on the seal spring will be
released as the impeller is unscrewed.
Slide the impeller adjusting shims (12) off the im-
peller shaft. Tie and tag the shims or measure and
record their thickness for ease of reassembly.
Seal Removal and Disassembly
(Figures 2 and 3)
Carefully remove the spring centering washer (11)
and seal spring. Slide the shaft sleeve (8) and rotat-
ing portion of the seal off the engine shaft as a unit.
Apply oil to the shaft sleeve and work it up under
the rubber bellows. Slide the rotating portion of the
seal off the shaft sleeve.
Use a pair of stiff wires with hooked ends to remove
the stationary seat and O-ring from the intermedi-
ate bore.
NOTE
An alternate method of removing the stationary seat
is to remove the hardware (5 and 6) and separate
the intermediate (9) from the engine. Use a wooden
dowel or other suitable tool to press the stationary
seat and O-ring out of the intermediate bore from
the back side of the intermediate.
If no further disassembly is required, see Seal
Reassembly and Installation.
Seal Reassembly and Installation
(Figures 2 and 3)
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.
Handle the seal parts with extreme care to prevent
damage. Be careful not to contaminate precision