Pratissoli VFH Serie Manuel D'utilisation Et D'entretien page 31

10 START-UP AND OPERATION
10.1 Preliminary checks
Before start-up, ensure that:
The suction line is connected and pressurized
(see par. 9.4 - 9.5 - 9.6) the pump must never run
dry.
1. The suction line ensures a hermetic seal over time.
2. Any shut-off valves between the supply source and the
pump are fully open. The outlet line is free discharge, to
permit rapid expulsion of the air present in the pump
manifold and therefore facilitate fast priming.
3. All suction and outlet fittings and connections are
properly tightened.
4. The coupling tolerances on the pump/transmission axis
(half-joint misalignment, Cardan joint tilt, belt pulling,
etc.) remain within limits required by the transmission
manufacturer.
5. Oil in the pump casing is at level, verified with a dipstick
(pos. , Fig. 15) and exceptionally with a level indicator
(pos. , Fig. 15).
In case of prolonged storage or long-term
inactivity, check proper functioning of the
suction and outlet valves.
10.2 Start-up
1. At first start-up, verify that the rotation direction and the
supply pressure are correct.
2. Start-up the pump without any load.
3. Check that the supply pressure is correct.
4. Check that the rotation rpm during operation does not
exceed the nominal rpm of the pump.
5. Let the pump run for a period of no less than 3 minutes,
before putting it under pressure.
6. Before each pump stop, reset pressure by means of the
control valve or with any relieving devices and reduce to a
minimum rpm (activation with combustion motor).
10.3 Seal packing cooling circuit
During operation, a certain amount of water coming from the
seal packing cooling circuit is discharged from the orifice 4.
The draining of this circuit must be sent back to the suction
line before the booster pump (Fig. 16), or to a tank for
collection.
11 PREVENTIVE MAINTENANCE
For pump reliability and efficiency, comply with maintenance
intervals as shown in the table.
PREVENTIVE MAINTENANCE
Every 500 hours
Check oil level
Fig. 15
12 PUMP STORAGE
12.1 Long-term inactivity
If the pump is started for the first time after a long
period from the date of shipment, before operation
check the oil level, inspect the valves as specified
in chapter 10, then follow described start-up
procedures.
12.2 Method for filling pump with anti-corrosion
emulsion or anti-freeze solution
Method for filling pump with anti-corrosion emulsion or
anti-freeze solution using an external diaphragm pump based
on the layout shown in par. 9.7 in Fig. 7:
• In place of the service tank, use a suitable container
containing the solution to be pumped.
• Close the filter drainage, if open.
• Make sure that the hoses to be used are clean inside and
spread grease on their connections.
• Connect the high pressure exhaust pipe to the pump.
• Connect the suction pipe to the diaphragm pump.
• Connect the suction pipe between the pump head and
the diaphragm pump.
• Fill the service container with solution/emulsion.
31
Fig. 16
Every 1000 hours
Change oil
Check / Replace:
Valves
Valve seats
Valve springs
Valve guides
Check / Replace:
H.P. seals
L.P. seals