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Instructions for removing and servicing the radiator
The removal of the heat exchanger for maintenance must
follow the following steps:
1. Close all the water input and output valves after the
ventilation is stopped;
2. Drain the water through the radiator drain plugs;
3. Remove the heads, keeping the screws, nuts and
washers and seals (gaskets) in a safe place;
4. Brush the tubes inside carefully with nylon brushes for
removing residues. If during the cleaning damages to
the radiator tubes are found, they can be repaired;
5. Reassemble the heads, replacing the gaskets, if
necessary.
6.9
ALTERNATOR OUT OF
OPERATION
The following special care must be taken if the alternator
will remain for a long period out of operation:
Connect the space heaters for the temperature inside
the alternator to be kept slightly above the ambient
temperature, thereby preventing condensation and
consequent decrease in the winding insulation
resistance and oxidation of metal parts.
All the radiators and water pipes (if applicable) must be
drained to reduce corrosion and deposit of materials
suspended in the cooling water.
Follow the remaining procedures described in item 3.2.3
of this manual.
Storage of the radiator after operation
When the radiator remains out of operation for a long
period, it must be drained and dried. Drying can be done
with preheated compressed air. During the winter, if there
is danger of freezing, the radiator must be drained, even
when it is out of operation for a short period, in order to
prevent deformation or damage.
NOTE
During short stops, it is preferable to maintain
the water flow at low speeds instead of
stopping its circulation, thus ensuring that
harmful compounds such as ammonia and
hydrogen sulfide are taken out of the heat
exchanger and do not settle inside.
6.10 SHAFT GROUNDING DEVICE
A brush for ground the shaft is a device use to prevent the
flow of electrical current through the bearings. The brush is
placed in contact with the shaft and connected to the
alternator frame, which must be grounded.
The types of shaft grounding used on WEG alternators are:
6.10.1 Grounding with internal brush
The shaft grounding is made with internal brush, according
to Figure 6.2
1
Figure 6.2: Internal brush for shaft grounding
Legend of Figure 6.2
1.
Grounding brush
2.
Brush fixing screw
Procedure to replace the brush
Remove the screw (2)
Remove the wear brush (1)
Install a new brush and the fixing screw.
6.10.2 Grounding with external brush
The shaft grounding is made with internal brush, according
:
to Figure 6.3
2
1
Figure 6.3: External brush for shaft grounding
Legend of Figure 6.3
1.
Grounding brush
2.
Pressure spring of brush-holder
Procedure to replace the brush
Remove the pressure spring (2)
Remove the wear brush (1)
Install a new brush and the pressure spring.
Installation, operation and maintenance manual
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