General Pump KFM Owner Manual - Manual (Page 12)

GENERAL PUMP
A member of the Interpump Group
KFM SERIES
Page 12
The suction line is connected and up to pres-
sure (see paragraphs 9.4, 9.5 and 9.6) the
pump must never run dry.
1. The suction line must be perfectly airtight.
2. All the On-Off valves between the pump and
the feeding source are completely open. The
delivery line must discharge freely in order to
allow the air in the pump to be expulsed
easily, thus facilitating pump priming.
3. All suction/delivery connections and fittings
must be correctly tightened.
4. Coupling tolerances on the pump/transmis-
sion axis (half-joint misalignment, Cardan
inclination, belt tightening, etc.) must remain
within the limits indicated by the transmission
Manufacturer.
5. The pump’s oil level must be verified
using the correct dipsticks (position 1, fig 13),
and expecially by means of the oil sight glass
(2, fig. 13).
In case the pump has not run for a long period
of time, recover the correct operation of the
suction valves.
10. START-UP AND OPERATION
10.1 Preliminary Inspections
Before Start-up Be sure that:
9.11 Definition of belt static tension values
Static tension depends on:
a) the center distance between the two pulleys
(belt length)
b) The load due to the belt’s static tension
c) The number of belts
d) The angle of wrap of the smallest pulley
e) Average speed
f) Etc.
For belts with an XPB profile, the diagram in fig. 11 allows
to obtain the valued of the static tension that must be
applied vs. the center distance between pulleys.
Finally, given a distance between pulley centers of 600
mm and a load of 75 Nm a belt flexion “te” of around 10.8
will confirm the correct belt tension as shown in fig. 12.
NOTE: If not differently indicated by the belt manufacturer
the inspection of the correct tension value, and the related tension
adjustment if needed, is to be carried out after at least 30 minutes of
operation in order to obtain belt setting. The best efficiency and maxi-
mum duration is obtained with the correct tension value.
NOTE: If required, or during dormal maintenance, never replace a single
belt but the entire set.
10.2 Start-up
1. When starting the pump for the first time, check for
the correct direction of rotation.
2. The pump must be started off-load.
3. Verify correct feeding pressure.
4. During operation, check that the rotating speed does
not exceed the rated value.
5. Before putting the pump under pressure let it run for
at least 3 minutes.
6. Before stopping the pump, release the pressure by
acting on the adjustment valve or on any discharging
device.