AU
11
7.2 Maintenance/inspection
7.2.1 Checking
instructions
During the first minutes of operation:
In cases of mechanical seal
-
There may be a brief large leak during start up. Should
this leak persist, shutdown the group and determine the
cause. The causes may be, amongst others, dirt in the
pumped area or dry operation due to incomplete
discharge of the pump air.
In cases of packing seal:
-
There is no leak; immediately loosen the gland to obtain
small dripping.
-
Excessive fluid leak; leave to settle for 10 minutes; tighten
the gland by turning 1/6th and leave for 5 minutes.
Repeat the process until between 20 and 60 drops per
minute are achieved.
After a few hours operation:
Check the bearing temperature at the point in
the bearing location area. Normal
temperature can reach up to 40°C above environmental
temperature, but must never exceed 90°C.
Observe the possible anomalies shown in point 8 of this
manual.
The reserve pumps should be started up and shutdown once
a week, in order to ensure they are always in service
conditions.
The failure of one or both sides of the seal may lead to
excess heating. This can be corrected by following the
instructions of the seal manufacturer, both with regards to its
assembly and the maintenance of the auxiliary seal devices,
where appropriate. Alternatively, the pump may be fitted with a
monitoring device if the purchaser has so specified.
7.2.2 Lubrication
The type of lubrication of the bearings of the pump depends
on its size and construction:
SIZE Construction
LUBRICATION
AU-M-1,5 Monobloc
Not
applicable
AU-M-2 Monobloc
Not
applicable
AU-M-3 Monobloc
Not
applicable
AU-M-50 Monobloc
Not
applicable
AU-1,5 Bearing
bracket
Lifelong
AU-2 Bearing
bracket
Lifelong
AU-3 Bearing
bracket
Lifelong
AU-50 Bearing
bracket Oil
AU-65 Support
Lifelong
AU-80 Bearing
bracket
Grease
AU-100 Bearing
bracket Oil
AU-150 Support Grease
AU-200 Support Oil
Before lubricating the pump, ensure that:
The pump is shutdown and cannot be started up
accidentally.
The bearing support temperature is less than 40ºC,
in order to prevent burns to the hands. To do this,
measure the temperature with a thermocouple.
The absence of oil/grease in the bearing support may
lead to a lack of lubrication of the lip seals, which will
come into dry contact with the shaft. This contact may lead to
a high shaft temperature which might cause ignition. To
prevent this, regularly check the oil/grease level in the
bearings support.
BEARINGS:
Lubricated with grease. PUMP WITHOUT GREASE
NIPPLES
:
The pump has special bearings, with dual closure and grease
in the interior, capable of working without outer grease
maintenance. The pump does not, therefore, have grease
nipples in the support.
Special attention must be paid to the type of
bearing when this is replaced, which must be
of the same type (2RS).
Note
Lubricated with grease PUMP WITH GREASE NIPPLES:
Note
The pump leaves the factory with the bearings greased for
approximately 1000 hours of operation.
For lubrication, a chart is attached with the amount of grease
to be applied in each greaser, along with the regularity.
Pump size
AMOUNT OF
GREASE [g]
Regularity [h]
AU-80
6
AU-150
25
4000
Lubricant change
In order to completely change the grease, first dismount the
bearings and carefully clean their positions in the support in
order to remove old grease.
Type of grease:
We recommend using lytic-based lubrication grease with
antioxidant additives, of consistency 2, in line with DIN-51502
K2K.
Pumps lubricated with oil
The pump leaves the factory without oil in the bearings
support. Once installed, proceed to fill it.
Oil filling
-
Release the support upper cap.
-
Pour oil through this orifice until the level is between the
minimum and maximum marks of the control dipstick.
-
Replace the upper cap. (Rest of pumps)
Oil change
The oil should be changed every 8000 hours of operation. If
the environment is dusty, humid or aggressive, this change
should be carried out more often.
-
Before changing the oil, start up the pump in order to
fluidifly it.
-
Release the upper filling cap and the lower drainage cap.
-
Empty the support oil and let it drain off.
-
Replace the lower cap and proceed to fill as indicated in
the preceding section.
