run the pump dry. Rotating parts wilI
eventually seize and mechanical seal
damage may occur. NEVER run the
pump at shutoff conditions. Energy
from the motor is imparted to the
liquid which is converted to heat. The
liquid may fl ash to vapor causing the
pump to burst.
Once the pump is started and run-
ning adjust the discharge gate valve
to your desired pressure. Make sure
there are no leaks in pump connec-
tions and piping. Check your motor
amps to make sure the motor is
running within its rated capacity. The
pump should be running smooth with
no vibration or excessive noise.
MAINTENANCE
The bearings in the close-coupled
motor are sealed and permanently
greased. No other greasing is
required. Periodic 6-month checks
of the unit should be made to make
sure the unit runs smoothly at its de-
sired performance. If possible keep a
log of the suction pressure, discharge
pressure and motor amps. Over a
period of time this information can tell
you if the pump parts are starting to
wear. If a problem arises check the
troubleshooting section for guidance.
If the problem cannot be rectifi ed call
your local distributor or the factory.
PUMP DISASSEMBLY
1. Shut disconnect off. Always make
sure the power to the pump is off.
2. Close suction and discharge gate
valves.
3. Drain the pump by removing the
top and bottom 1/8 NPT plugs on the
casing
4. Remove the motor hold down
bolts.
5. Remove the four bolts that hold the
adapter to the casing.
6. Slide back pull out assembly out
of casing, it may be necessary to pry
them apart.
7. Remove the casing o-ring and set
it aside. Inspect it to make sure it’s
not cut. Clean the o-ring groove on
the casing.
8. Remove the impeller cap screw.
2
1
3
4
5
6
7
8
9
10
11
14
15
12
13
9. The back of the motor will have a
small cap on it, pry it off. This reveals
the end of the motor shaft which has
a screwdriver slot or fl ats on it.
10. Remove the impeller. Use a
screwdriver or a wrench to hold the
exposed motor shaft. Carefully grab
the impeller (be careful not to cut
yourself on any sharp edges) and
turn it counterclockwise. It may be
very hard to get the impeller free.
11. Remove the mechanical seal
rotating elements.
12. Remove the four bolts holding the
adapter to the motor. The adapter,
which still has the stationary mem-
bers of the seal in it, will now pull off
the motor.
13. Remove the stationary member
of the seal and clean all the parts. Be
very careful not to scratch the seal
face, this will cause the seal to leak.
14. To reassemble follow the direc-
tions in reverse.
D91EF Bronze Fitted
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