3 inch submersible deep well pump repair and maintenance

Pump maintenance

1) Check if the 3 inch submersible deep well pump base, pump head and motor are stable.

2) Check the conditions of meters and leading-wires. Check if the pipeline leaks or becomes loose.

3) Replace the lubricating oil for shaft bearing timely.

4) Check the performance and running conditions of the pump regularly and make a detailed record. If you find any problem, maintain it at once.

3 inch submersible deep well pump assembly and disassembly

1) Preparation before disassembly

1. Drain the liquids inside the pump case.
2. Dismantle the associated pipes that will hinder the disassembly.

2) Disassembly steps

1. Screw off the bolts on bearing gland at the discharge side and the nuts that connect the discharge casing, stuffing box and shaft bearing, take down the shaft bearing.
2. Screw off the round nut on the shaft; take down the bearing cone, the bearing gland and the bearing retainer one by one in order. Next, take down the stuffing box, including packing gland, packing ring and the packing, etc.
3. Dismantle and take down the O shaped seal ring, shaft sleeve, balance disk and the key on the shaft one by one in order. Then, take down the discharging casing, including the last stage of guide vane and the balancing sleeve.
4. Having dismantled the last stage of guide vane and the key, next we dismantle the middle section of the pump, including the guide vane. Dismantle the remaining stages of impellers, middle sections and guide vanes in the same way, until the first stage of impeller is dismantled.
5. Screw off the nut that connects the suction section and the shaft bearing, and the bolts on bearing gland; dismantle the shaft bearing (the coupling should have been dismantled beforehand).
6. Take the shaft out of the suction section, screw off the fixing nuts on the shaft. Dismantle the bearing cone, O shaped seal ring, shaft sleeve, bearing retainer and so on one by one in order.

By far, you have finished dismantling most of the 3 inch submersible deep well pump. But during the above process, there are still some accessories connected together. Usually, you can dismantle those accessories by screwing off their bolts or nuts.

The order of assembly is generally in contrary to the order of disassembly.