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The time between the inspections is strongly dependent on the operation conditions of the pump:
the characteristics of the liquid, the temperature, the materials used and obviously the period of
operation.
After the first start-up of the pump we strongly recommend an inspection of the bearings after 3
months of functioning. If the inspection has positive results, we recommend a second check after
further 6 months. The following inspection can be scheduled after another year of functioning
(about 2000 working hours of the pump). In any case it is advisable to replace the bearings in
PTFEC every 2000 hours of functioning of the pump. All the other components can be replaced
only when they show signs of wear.
If a problem occurred or the pump needs a complete inspection see section “Problem solutions”
and “Pump disassembly”.
4.3 Procedure Before Disassembly
If the pump has pumped hot liquids, make sure that it’s been cooled before the
disassembly procedure. It’s possible that the pump has pumped toxic and/or dangerous
liquids: so it’s necessary to wear protection for the skin and the eyes.
Make sure that the pump has been carefully decontaminated and cleaned. Wash
and neutralize completely the dangerous liquids inside the pump. The liquid has to
be collected and eliminated according to the existing environmental laws. After
disconnecting the discharge and suction pipes close the extremities.
GemmeCotti pumps contain extremely strong magnets. The use of non ferro-magnetic
tools and working surfaces is highly recommended. Pay attention to the strong magnetic
attraction when disassembling/assembling the unit motor-external magnet of the pump.
The area in which maintenance is done has to be clean and without ferric particles that
can be attracted by the magnets.
4.4 Disassembly
The photos used to show the operations of disassembly refer to a particular pump model of the
series HTM and consequently the pump supplied to you can be slightly different from what is
shown.
4.4.1 Main Parts
The drawing below shows a section with all the main parts of a pump series HTM in thermoplastic
material (In particular models 15 and 31).