Pump Diagnosis & Repair

Borehole and water pump faults — level, hydraulics, delivery path and the electrical side down the hole. Most of the diagnosis belongs at the surface, because pulling a pump is expensive and hazardous and is frequently unnecessary once the water level has actually been measured.

What this covers

• ▪No delivery and reduced flow — Borehole Pump Runs But Delivers No Water
• ▪Water level, drawdown and borehole yield — Borehole Pump Runs But Delivers No Water
• ▪Non-return valves and rising main faults — Borehole Pump Runs But Delivers No Water
• ▪Hydraulic wear and sand abrasion — Hydraulic Wear and Sand Abrasion
• ▪Drop cable, splice and motor testing — Borehole Drop Cable, Splice and Motor Testing
• ▪Dry-run protection and control — Pump Runs Continuously and Will Not Shut Off

Diagnosis guides

• Borehole Pump Runs But Delivers No Water — Diagnosis and Repair

  Submersible borehole and well pumps, single- and three-phase, on direct-on-line, soft-start or variable-speed control

  9 diagnostic steps · advanced · qualified electrician

• Pump Runs Continuously and Will Not Shut Off

  Borehole, booster and transfer pumps under pressure-switch, level or variable-speed control

  8 diagnostic steps · intermediate · technician

• Borehole Drop Cable, Splice and Motor Testing — Before You Pull the Pump

  Three-phase and single-phase submersible borehole pumps, direct-on-line, soft-start and inverter-fed, with rising main and drop cable of any length

  8 diagnostic steps · intermediate · qualified electrician

• Hydraulic Wear and Sand Abrasion — Why the Borehole Output Keeps Falling

  Multistage submersible borehole pumps, and surface centrifugal pumps handling abrasive-laden water, in agricultural, municipal and industrial supply

  8 diagnostic steps · intermediate · technician

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• Motor Diagnosis & Rewinding
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