Figure 3 - Components
Operation (Continued)
Never run pump
dry or with flow
shutoff. When pump is running, always
maintain a minimum flow of 4 gpm
[0.9 m
3
/h] to avoid damage to pump.
STARTUP PROCEDURE
To avoid pump
damage, it is very
important to purge all air from pump
before initial startup.
1. Close discharge valve if present.
2. Permit liquid to flow into pump thru
suction port by gravity.
3. Allow air to escape from pump by
cracking open Vent Plug (Ref.
No. 13) in top of pump housing
near motor.
4. Wait for liquid to cease sputtering.
When liquid flow changes to a steady
stream with no air, close Vent Plug.
5. Run pump briefly, then repeat steps
1 thru 4 repeatedly until all air is
evacuated. Pump is now ready to
be run.
ROTATION
Proper rotation is CLOCKWISE when
looking up at shaft end of motor, see
directional arrow cast into motor Adapter
(Ref. No. 8). Bump motor on/off briefly
to confirm motor is wired for correct
rotation. Disregard rotation information
found elsewhere in safety manual.
DRAINING
1. Remove Bypass Valve (Ref. No. 42)
and Vent Plug (Ref. No. 13)
completely.
2. Allow liquid to drain.
3. If pump is to be subjected to
freezing temperatures, do not
reinstall Valve/Plug.
CYCLING
Frequent on/off cycling can shorten
motor life. System should be designed so
that pump is NOT starting more than 15
times per hour.
Maintenance
Make certain
that unit is
disconnected from power source before
attempting to service or remove any
components!
MOTOR REPLACEMENT
DISASSEMBLY
Refer to Figure 8
1. Remove two coupling Shields (Ref.
No. 9) by unscrewing two Fasteners
(Ref. No. 10) for each.
2. Loosen four Fasteners (Ref. No. 4) in
Coupling (Ref. No. 3) evenly until
Motor shaft (Ref. No. 1) can turn
independently from Coupling.
3. Remove four Fasteners (Ref. No. 14)
from Adapter (Ref. No 8). Motor is
now free, lift straight up to remove
from unit.
REASSEMBLY
1. Remove key (if present) from new
Motor shaft and discard.
2. Wipe any protective film from Motor
end bell and shaft, be sure they are
clean.
3. Carefully guide Motor shaft into
Coupling while setting new Motor
into place.
4. Reinstall four Fasteners thru Adapter.
Tighten evenly and in diagonal
pattern, then torque to the following
specifications:
3/8.....................17 ft-lbs. [23 N-m]
1/2.....................30 ft-lbs. [41 N-m]
5. Locate shaft keyway in center of
Coupling (See Figure 4) and maintain
this position, then snug up Fasteners
evenly. Check gap between coupling
halves to be sure it remains even on
both sides. Torque Fasteners to the
following specifications.
M6 .....................10 ft-lbs. [14 N-m]
M8 .....................23 ft-lbs. [31 N-m]
M10....................46 ft-lbs. [62 N-m]
6. Rotate pump Shaft by hand. If
binding or rubbing is found, loosen
Coupling and readjust position.
7. Reattach Shields and proceed to
Startup Procedure section.
SHAFT SEAL REPLACEMENT
DISASSEMBLY
Refer to Figure 8.
1. Remove Motor (see Motor
Replacement section).
3
Models MSV1, MSV3, and MSV5
2
Specifications Information an
d Repair Parts Manual
Models PM1, PM3, and PM5
3
Figure 3 - Components
