Lister Petter T Series, Руководство оператора, Страница: 74 / 81

17
tHe eCo28 alternator operators' Handbook
Figure 6.1.4 Heating a Bearing
5. Wearing protective safety gloves
replace the bearing.
6.2 CleanInG tHe aIr fIlters
These instructions only apply if optional
filters are fitted.
danGer
It is important to ensure that all the
necessary precautions to prevent
an inadvertent starting of the set
during this maintenance, operation
have been taken.
The air filters must be cleaned on a
regular basis. Inside each filter there
is a mesh net that has to be kept dean
in order to ensure a good performance
of the filter.
The time interval between each
cleaning operation depends on the
conditions of the installation site. A
frequent inspection of the filters will
establish if any cleaning is required.
6.3 WIndInGs
Both the windings and the alternator will
last longer with correct maintenance
and cleaning; an inspection and a
maintenance schedule should be
established.
The time interval between each
cleaning operation depends on the
conditions of the installation site.
Frequent inspection of the windings will
establish if any cleaning is required. If
the alternator is used in a dry and clean
environment, an annual inspection
may be suitable. In cases of severe
conditions, more frequent inspections
must be carried.
It is highly recommended that a check
should be done, regardless of the
schedules, in the following cases:
a. In cases of rust.
b. In cases of corrosion.
c. When the insulation is damaged.
d. When there is dust on the surface of
the windings.
Cleaning the Windings
1. To clean the windings, use solvents
like oil of turpentine or "Solvesso"
solvent. Cleaning with such
substances, which contain a high
evaporation level, will not damage
the insulation level of the windings.
Lister Petter also recommend
"drying-out" the windings at
60-80°C.
2. When the cleaning process is
complete, check for any signs of
overheating or carbonisation.
3. Check the varnish on the windings
and if it is not in good condition they
should be re-varnished.
6.4 tHe dIode brIdGe
The diode bridge has three separate
sectors with two diodes fixed on each
sector.
Diodes can be easily inspected with
a multi-meter by simply disconnecting
the wire of the particular diode and
check the resistance in both directions.
A perfectly functioning diode will show
a very high resistance in one direction