V-Belt Transmission; Start-Up And Operation; Preliminary Checks; Start-Up - Pratissoli MK-MKS Serie Manual De Uso Y Mantenimiento

9.10

V-belt transmission

As indicated in par. 9.1 in exceptional cases only, the pump
can be controlled by a V-belt system.
For proper layout sizing, consult with our Technical or
Customer Service Departments.
10

START-UP AND OPERATION

10.1

Preliminary checks

Before start-up, ensure that:
The suction line is connected and pressurised
(see chapter 9): 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 during is free
discharge, to permit air present in the pump head to come
out quickly and therefore favour 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 the required level, verified with
the dipsticks (pos. , Fig. 8).
In case of prolonged storage or long-term
inactivity, you need to restore the proper
functioning of the suction valves by opening the
three valve-lift devices (see pos.  Fig. 9). Make
sure you have closed the valves before starting
the pump.
For the "work" and "rest" positions, see Fig. 10.
VALVE CLOSED -
WORK POSITION -
10.2

Start-up

1. At first start-up, verify that the rotation direction is correct.
2. Check the pump is fed correctly.
3. Start-up the pump without any load.
4. Check that the rotation rpm during operation does not
exceed the nominal rpm of the pump.
5. Let the pump run for a time 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.
Should there be any priming trouble due to
insufficient supply, it is possible to remove the
three plugs in front of the head (except for the
MK40 version) as shown in pos.  Fig. 11.
11

PREVENTIVE MAINTENANCE

Fig. 8
For pump reliability and efficiency, comply with maintenance
intervals as shown in the table below.
PREVENTIVE MAINTENANCE
Every 500 hours
Check oil level
* To replace, follow instructions contained in the Repair
manual.
Fig. 9
40
SAFETY DEVICE VALVE OPEN - REST
RELEASE POSITION -
Every 1500 hours
Change oil
Check / Replace*:
Valves
Valve seats
Valve springs
Valve guides
Check / Replace*:
H.P. seals
L.P. seals
Fig. 10
Fig. 11