OPERATING INSTRUCTIONS
1. INSTALLATION:
Pump may be mounted in any
position without loss of efficiency; however, it is
suggested that the pump head be down if vertical
mounting is desired. The rotation of the motor
shaft determines the location of the pump’s intake
and discharge ports. Refer to Dimensional
Drawing. Right hand port, looking at pump end
cover,
is
inlet port.
2. DRIVE:
Direct.
3. SELF-PRIMING:
Pump will produce a suction lift
approaching 10 feet (3m) when dry and a lift up to
22 feet (6.7m) when primed. Be sure suction lines
are airtight or pump will not self-prime.
4. 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
5. PRESSURES:
For continuous operation, pressure
should not exceed 20 psi (1.4 kg/sq cm).
6. TEMPERATURES:
Nitrile impeller recommended
for liquid temperatures of 50° to 180°F (10° to
82°C).
7. FREEZING WEATHER:
Drain unit by loosening
the end cover.
8. NOTICE:
Do not pump solvents, thinners, highly
concentrated or organic acids. Damage to pump
may result. If corrosive fluids must be handled,
pump life will be prolonged if pump is flushed with
water after each use or after each work day.
9. GASKET:
Use standard pump part. A thicker gas-
ket will reduce priming ability. A thinner gasket will
cause impeller to bind. Standard thickness
0.010".
10. SPARE PARTS:
A Jabsco Service Kit should be
kept on hand to service all but the most badly
worn 11810-Series pump.
SERVICE INSTRUCTIONS
DISASSEMBLY
1. Remove end cover screws, gasket and end cover.
2. Grasp impeller hub with water pump pliers and
withdraw from body.
3. Loosen cam screw and remove cam. Clean off
sealant. Remove wearplate with screwdriver or
hooked wire.
4. Loosen nut at body clamp. Remove body from
motor shaft.
5. Press put seal from motor mounting end of body
towards impeller bore.
6. Remove slinger from shaft.
NOTE: Inspect all parts for wear or damage and
replace if necessary.
ASSEMBLY
1. Install slinger and position 1⁄4" from motor boss.
2. Press seal into seal bore with lip facing toward the
impeller bore. Apply grease to back of seal lip.
3. Install wearplate, aligning slot with dowel pin.
4. Apply sealant to top of cam and cam screw
threads. Install cam with cam screw.
5. Install body on motor. Tighten nut at clamp. Do
not over tighten or binding of shaft will result.
6. Lubricate impeller bore with water pump grease.
7. Lubricate shaft OD with grease, align drive ding in
extended impeller insert with flat on shaft and
install impeller.
8. Install gasket, end cover and end cover screws.
TO EQUIP WITH VACUUM SWITCH (4732-0000)
1. Install switch in tapped hole on top of inlet port.
(Seal threads prior to assembly.)
2. Connect switch to motor. See diagram.
3. Plug into 115V AC outlet and hold down restart
lever on switch until the pump primes.
SPECIAL ATTENTION
1. Constant vibration of the restart lever indicates:
(A) An air leak. This will usually show up when the
pump is first started. All suction lines should be
checked for loose connections.
(B) A worn impeller. Impeller should be replaced.
2. Intermittent stopping and starting indicates that
the unit is operating against excessive discharge
pressure.
VACUUM SWITCH WIRING DIAGRAM
