In my opinion, most damage caused to any pump must surely be in the first few seconds of starting up a new system. With empty pipe-work it takes a few vital seconds to get oil into the pump and it is crucial to prevent any breakdown in the boundary lubrication of the running parts.
The Piston pump case should be filled through the drain port (ensure that the port is on top and cannot siphon back). Gear and vane pumps work better with flooded suction and remember that the suction line diameter and length must be correctly sized to avoid cavitation.
I start a new system using stop/start method, each time increasing the running time by a few more seconds. Eventually building up to full speed (tricky with engine drives but can be done).
Steel pipe-work and hoses should be flushed to avoid dangerous particles entering your brand new pump. Once the damage starts it becomes self perpetuating and can substantial decrease pump life.
DC motor systems have their own unique problems. These electric motors are often burnt out during the commissioning stage. DC motors are not continuously rated and have a maximum running time and minimum cooling period, this is often forgotten.
If you have any ideas or tips on this subject I would love to hear from you.
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