Gorman-Rupp Pumps 11 1/2A2-E2 1P 1046838 and up - Manual (Page 26)

OM-04092 10 SERIES
MAINTENANCE & REPAIR PAGE E - 5
Pump Casing Removal
Death or serious personal injury and
damage to the pump or components
can occur if proper lifting procedures
are not observed. Make certain that
hoists, chains, slings or cables are in
good working condition and of suffi­
cient capacity and that they are posi­
tioned so that loads will be balanced
and the pump or components will not be
damaged when lifting. Suction and dis­
charge hoses and piping must be re­
moved from the pump before lifting. Lift
the pump or component only as high as
necessary and keep personnel away
from suspended objects.
To service the impeller or seal assembly, discon­
nect the discharge piping. Remove the hardware
securing the pump casing (1) to the base.
Tie and tag any leveling shims used under the cas­
ing mounting feet to ease reassembly.
Remove the nuts (13) and separate the pump cas­
ing and gasket set (25) from the intermediate (24).
Clean the mating surfaces of the intermediate and
pump casing. Tie and tag the gaskets, or measure
and record their thickness for ease of reassembly.
Impeller Removal
Before removing the impeller, turn the cross arm on
the automatic grease cup (14) clockwise until it
rests against the cover (see Figure 3). This will pre­
vent the grease from escaping when the impeller is
removed.
To loosen the impeller (2), immobilize the motor
shaft and tap the vanes of the impeller in a counter­
clockwise direction (when facing the impeller) with
a block of wood or a soft‐faced mallet. Be careful
not to damage the impeller vanes. 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 (11)
off the motor shaft. Tie and tag the shims or mea­
sure and record their thickness for ease of reas­
sembly.
Seal Removal and Disassembly
Carefully remove the outboard rotating and sta­
tionary seal elements, packing ring, stationary
washer, seal spring and spacer sleeve from the in­
termediate. Use a stiff wire with a hooked end to re­
move the inboard stationary washer, packing ring,
stationary and rotating seal elements and slinger
ring (18).
NOTE
An alternate method of removing the seal assembly
is to disengage the hardware (22 and 23) securing
the intermediate to the motor, and slide the interme­
diate and seal assembly off the shaft as a single
unit. Remove the grease cup and piping (14, 15 and
16) from the intermediate, and use a suitable sized
dowel to press the seal components from the inter­
mediate.
Inspect the seal liner (21) for wear or grooves
which could cause leakage or damage to the seal
packing rings. The seal liner is a press fit in the in­
termediate and does not normally require replace­
ment. If replacement is necessary, remove the
grease cup and piping (14, 15 and 16). Disengage
the hardware (22 and 23) and separate the inter­
mediate from the motor. See Seal Reassembly
and Installation for seal liner replacement.
If no further disassembly is required, see Seal
Reassembly and Installation.
Seal Reassembly and Installation
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