motor should be ball bearing equipped with the front
bearing locked against axial movement. Motor
should be capacitor start and foot mounted.
3.
SELF-PRIMING – Primes at low or high speeds. For
vertical dry suction lift of 10' (3m) (neoprene/nitrile/
viton) – 6' (1.8m) (EPDM), a minimum of 860 RPM
is required. Pump will produce suction lift up to 22'
(6.7m) when wet.
BE SURE SUCTION LINES ARE AIRTIGHT OR
PUMP WILL NOT SELF-PRIME.
4.
DISCHARGE – When transferring liquids further
than 25' (7.6m), use one size larger discharge line
than discharge port size.
5.
RUNNING DRY – Unit depends on liquid pumped
for lubrication. DO NOT RUN DRY for more than 30
seconds. Lack of liquid will damage the impeller.
6.
CHEMICAL COMPATIBILITY – Consult the
Chemical Resistance Guide in the JABSCO
Industrial Pump Catalog (available upon request
from the factory) for proper body materials and
impeller compounds. If corrosive fluids are handled,
pump life will be prolonged if pump is flushed with a
neutralizing solution after each use or after each
work day. A Tungsten Carbide Seal variation is
available for pumping liquids that contain abrasives
or are highly corrosive.
7.
PRESSURES – Consult Performance Curve for
maximum recommended pressure for pumps in
continuous operation. If pressures exceed those
shown, consult the factory.
8.
TEMPERATURES – The operating temperature
limits of the pump depend on the impeller
compound. The following ranges apply:
Neoprene - 45° to 180°F (7° to 82°C),
Nitrile - 50° to 180°F (10° to 82°C),
Viton - 60° to 180°F (15° to 82°C),
EPDM - 45° to 185°F (7° to 85°C).
9.
IMPELLER TORQUE – The torque required to
initiate rotation of a new impeller in a dry pump body
is:
Standard Pressure Impeller (14281-Series):
Forward = 1.5 pounds force - feet
Reverse = 4.3 pounds force - feet
These values may vary slightly due to impeller
compounding, blade set, and body material of
construction. Consult factory for more information.
10. SPARE PARTS – To avoid costly shutdowns, keep
a spare JABSCO impeller, seal and O-ring set on hand.
SERVICE INSTRUCTIONS
DISASSEMBLY
1.
Remove the four end cover screws. Remove end
cover and O-ring.
2.
Remove the four screws, holding the body to the
adapter flange. Slide body, complete with impeller
and wearplate, from adapter and shaft.
3.
Remove mechanical seal by inserting two screwdrivers
behind seal collar, and gently lever collar and seal
assembly forward on shaft. Use extreme care not to
mar
shaft
surface.
Remove
seal
seat and rubber cup from recess in wearplate.
4.
Remove the four screws holding the adapter to the
motor and remove the adapter.
5.
Stub shaft is held in place with set screws and Loctite*
RC/680 retaining compound. Extreme care must be
taken not to damage the motor shaft and bearings
when removing the stub shaft. Heat shaft joint area to
facilitate disassembly of set screws and stub shaft from
motor shaft. DO NOT EXCEED 300°F when heating
joint area. Once joint area has been heated, remove
set screws and slide stub shaft from motor shaft.
ASSEMBLY
1.
Liberally apply Loctite RC/680 retaining compound to
the motor shaft and slide the stub shaft on, positioning
the base of the stub shaft 0.37" from the bolt mounting
surface of motor and two of the four set screw holes
over the keyway in the motor shaft. For clarification
refer to figure 1 below. Loctite aids in preventing fretting
and subsequent shaft failure. Wipe off excess Loctite.
Apply Loctite to the two dog point (flat point) set
screws, position in the set screw holes aligned with the
keyway of the motor shaft and torque to 55-60 in.-lbs.
Apply Loctite to the two cap point screws and torque to
85 - 90 in.-lbs.
2.
Replace the adapter on the motor and tighten the four
mounting screws to 20 ft.-lbs.
3.
Replace mechanical seal by sliding spacer onto shaft
up to locating shoulder, then smear shaft with light
lubricating oil. Push on seal gently until it engages with
spacer. Fit rubber cup and seal seat into wearplate.
4.
Insert impeller in pump body, fit O-ring in each end of
the pump body.
5.
Slide body assembly over shaft. Fit body to adapter
screws. Torque screws to 10 in.-lbs.
NOTE: Cracking of body may occur. DO NOT
overtighten screws.
6.
Fit end cover and end cover screws. Torque screws to
10 in.-lbs.
7.
Changing Pump Rotation (looking at end cover):
a.
Clockwise Rotation: Insert impeller into pump body
* Loctite is a trademark of Loctite Corporation.
MOTOR
0.37"
STUB SHAFT
BASE OF
STUB SHAFT
BOLT MOUNTING
SURFACE
FIGURE 1