MAINTENANCE

Interpump pumps are delivered ready to go with their first oil filling and a transport plug (red) to prevent oil leakage during shipping. The oil dip-stick with level gauge and breather hole (black/yellow) are supplied separately. Before starting the pump, replace the transport plug with the dip-stick.


The first oil change must be after the first 50 hours of pump operation, while successive changes are required every 500 hours. We recommend the use of an SAE 30 oil. Between oil changes, periodically check the oil level in the clear gauge or using the dip-stick, and top-up if necessary.
 

During scheduled checks, also check that water has not seeped into the oil (if it has, the oil will be whitish in colour). Seepage may be caused by excessive seal leaks (poor maintenance) or condensation build-up in surroundings that are very humid or subject to wide temperature swings.
 

Water seals and inlet/outlet valves are components subject to wear that need periodical checking and replacement. Seal wear can be noticed by a drop in pump pressure or formation of drops under the pump where the head is connected to the crankcase. If this happens, the entire seal set must be replaced as soon as possible to avoid water seeping into the crankcase and damaging mechanical parts.
 

Wear can be noticed by a drop or variation in pressure and often machine vibrations of the inlet/outlet valve. If the pump is to remain inactive for an extended period of time, it is a good idea to drain it completely. To do this, disconnect the inlet and outlet pipes and run the pump empty for a few seconds (10 sec. max.). This precaution is absolutely indispensable if the pump is to remain at a temperature below 0°C, even for a short period of time.