3
SERVICE KIT
290X / 390X SERIES
1
Pressure Switch
94-706-00
1
Pressure Switch (290X)
94-706-07
2
Upper Housing
94-706-01
3
Valve Housing
94-706-02
4
Drive Assembly
94-706-06
5
Motor 12 V DC (290X)
77-735-17
5
Motor 12 V DC
77-023-17
5
Motor 25 V DC
77-029-17
SERVICE KIT
4900 SERIES
1
Pressure Switch
94-668-00
2
Upper Housing
94-670-01
3
Valve Housing
94-669-00
4
Drive Assembly
94-670-00
5
Motor 12 V DC
77-013-07
TROUBLESHOOTING
PUMP WILL NOT START/
BLOWS CIRCUIT
√ Is the motor hot? Thermal breaker
may have triggered; it will reset
when cool.
√ Electrical connections, fuse or
breaker, main switch, and ground
connection.
√ Is voltage present at the switch?
√ Charging System for correct voltage
(±10%) and good ground.
√ For an open or grounded circuit, or
motor; or improperly sized wire.
√ For seized or locked diaphragm as-
sembly (water frozen?).
WILL NOT PRIME/SPUTTERS
(No Discharge/Motor Runs)
√ Is the strainer clogged with debris?
√ Is there water in the tank, or has air
collected in the hot water heater?
√ Is the inlet tubing/plumbing suck-
ing in air at plumbing connections
(vacuum leak)?
√ Is inlet/outlet plumbing severely
restricted or kinked?
√ Proper voltage with the pump oper-
ating (±10%).
√ For debris in pump inlet/outlet
valves or swollen/dry valves.
√ Pump housing for cracks or loose
drive assembly screws.
LEAKS FROM PUMP HEAD OR SWITCH
√ For loose screws at switch or pump
head.
√ Switch diaphragm ruptured or
pinched.
√ For punctured diaphragm if water is
present in the drive assembly.
PUMP WILL NOT SHUT-OFF / RUNS
WHEN FAUCET IS CLOSED
√ Output side (pressure) plumbing for
leaks, and inspect for leaky valves
or toilet.
√ For air trapped in outlet side (water
heater) or pump head.
√ For correct voltage to pump (±10%).
√ For loose drive assembly or pump
head screws.
√ Are the valves or internal check
valve held open by debris or is rub-
ber swollen?
√ Pressure switch operation/adjust-
ment incorrect, refer to shut-off
adjustment for switch.
NOISY OR ROUGH OPERATION
√ For plumbing which may have
vibrated loose.
√ Is the pump plumbed with rigid pipe
causing noise to transmit?
√ Does the mounting surface multiply
noise (flexible)?
√ For mounting feet that are loose or
are compressed too tight.
√ For loose pump head to motor
screws. (3 long screws)
√ The motor with pump head re-
moved. Is noise from motor or
pump head?
RAPID CYCLING
√ Pressure switch shut-off adjust-
ment.
√ Water filter/purifier should be on
separate feed line.
√ For restrictive plumbing, flow
restrictors in faucets/shower heads.
Vibration induced by sea conditions or transporting can cause plumbing or pump
hardware to loosen. Check for system components that are loose. Many symptoms
can be resolved by simply tightening the hardware. Check the following items along
with other particulars of your system.
4900 Series
290X / 390X Series
1
1
2
2
3
3
4
4
5
5
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