Sea Recovery Aqua Mini 170, Owner'S Manual, Page: 83 / 170

High Pressure Pump Electric Motor
Troubleshoot electric motor failure to ensure that any abnormality from the power, wiring, wiring connections,
contactor, or control circuit are not at fault or at cause. If the electric motor has failed, it will require replacement.
Depending upon failure, replacement may be more cost effective than repair. If failure of the motor is due to external
source, not the motor itself, then correct the cause or else the replacement or repaired motor will fail again.
Failures of the electric motor may be:
• Bearing failure. Bearings are field replaceable.
• Winding failure. Generally caused by low or high power, below or above the specified voltage requirements of
the system, and feeding the motor. This is Not economically repairable.
• Internal centrifugal switch. Generally mechanical failure of the switch. Field replaceable.
• Capacitor failure. Generally caused by low power feeding the motor. Also caused by rapidly repeating starting
and stopping of the motor. Field replaceable.
Back Pressure Regulator [17]
If the Back Pressure Regulator valve leaks from the valve stem, lightly tighten the packing gland nut located below
the valve stem. Should adjustment fail to stop the leak, replace the stem and internal packing or replace the entire
valve.
High Pressure Gauge [15]
If the pressure gauge fails to register, the orifice may be corroded with debris. Use a thin wire or small diameter
(1/64th” / 0.4 mm) drill bit to dislodge any debris trapped within the pressure port orifice. If clearing the orifice does
not bring the gauge to normal operation, then replace the gauge.
High Pressure Pump [11]
Failure Signs and possible causes (troubleshooting):
1. Abnormally High Pulsations at the High Pressure Gauge are caused by
• Worn or broken Valve
• Worn or broken Valve Spring
• Worn or broken Valve Seat
• Debris in Valve Chamber
2. Water Leak between the High Pressure Pump Manifold and Rear Section caused by.
• Worn Low Pressure Seals
• Low Pressure Seals damaged due to running dry.
3. Flow drops dramatically when attempting to pressurize and/or unable to build pressure. This is caused by:
• Worn High Pressure Seals
• High Pressure Seals damaged due to running dry
• Broken Valve
• Broken Valve Spring
• Debris in Valve Chamber
High Pressure Pump Servicing
Disassembly of the Discharge Valve Assemblies
Tools required: 3/8” Drive Ratchet; 6 mm Hex Socket; O-Ring Pick; Two slotted screwdrivers, Torque Wrench;
Needle Noise Pliers.
Only one valve kit is required to repair all of the valves in one pump. The Valve Kit includes new valve O-Rings,
valve seats, valves, and springs.
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Maintenance and Repair