Maintenance; Precaution; Mechanism; Pumphead - Seko SPRING Manuel D'installation

4. MAINTENANCE

4.1 Precautions
 Before servicing pump or plant verify that all electric connections (power and control) have been disconnected
from mains and are no more fed.
 Depressurize completely pump and pipes and drain the section in which maintenance is required
 Always work wearing the required safety protections.
 Don't pour in the ambient polluting substances such as pumped chemicals, hydraulic liquid, lubricating oil a.s.o.
 Before servicing pump or plant read carefully the technical specification of the handled fluids with particular re-
spect to the actions that must be done in case of accidental contact with a dangerous fluid.
4.2

Mechanism

Pumps are generally supplied complete with the first oil filling; replace oil after 1500 operation hours and after-
wards every 4000 hour.
However replace oil every year .
Check weekly the oil level and, when required, restore the correct level using the same oil; check also for possible
leakages through the lip seal on the piston rod and if necessary replace the lip seal.
ATTENTION!
Please use only oil with these features:
4.3

Pumphead

Don't let the pump running without process liquid.
As minimum every six months, dismount the pumphead as follows:
 Disconnect suction and discharge pipes
 Drain process liquid rom pump head and pipes
 unscrew bolts fixing the pumphead to mechanism
 dismount suction and discharge valves
and carry out he following operations:
 wash thoroughly the suction and discharge valves and verify whether any part is worn or scratched; replace them
if required
 replace plunger packing in case it is worn; grease new seals before assembling
 check the plunger sliding surface where seals operate; the surface should be without scoring or scratches; when
damaged replace the plunger
4.4 Recommended spares
In order to face normal service problems and to avoid possible waste of time, we suggest to keep in stock a small
supply of the following spares:
 One plunger
 Two sets of plunger packing
 One suction valve complete
 One discharge valve complete
When ordering spares, please indicate always the model and the serial number of the pump
SPR0136001
ISO VISCOSITY GRADE 320
Rev. 2.4 EN 7