MAINTENANCE
US / WHISPER 6/8/11 / July 2009 / Copyright © 2009 Mastervolt
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4 MAINTENANCE
4.1 ALTERNATOR
The alternator does not require any maintenance. Periodic
inspection and cleaning is recommended, depending on
environmental conditions.
However when the alternator has been idle for a long
period attention to winding condition is recommended.
The condition of windings can be assessed by
measurement of insulation resistance to earth.
The CAPACITOR should be disconnected during this test.
A 500V ‘megger’ or similar instrument should be used. The
insulation resistance to earth of all windings should be in
excess of 1.0 MOhm. Should the insulation resistance be
less than this value, drying out the generator windings is
essential. Drying out can be carried out by direct warm air
from a fan heater or similar apparatus into the generator
air inlets or outlets.
All bearings are greased for life and not regreasable.
4.2 ENGINE
4.2.1
Preliminary instructions
All regular maintenance can be carried out when the
enclosure is open. When oil and dirt has gathered in the
enclosure measures have to be taken to avoid spilling oil
and polluting the environment.
The first service on the engine should be carried out after
50 hours of its life and after a major overhaul. In the first
50 hours the engine should receive special attention:
Long periods of light or no load running in the first 50
hours may lead to cylinder glazing and high oil
consumption.
For the same reason it is of the greatest
importance to use the right oil specification
The first time starting up or after running out of fuel it could
be necessary to prime the fuel system.
4.2.2
Bleeding fuel lines
Ensure there is sufficient fuel. The system is self bleeding.
The first time starting up or after running out of fuel it could
be necessary to prime the fuel system. Push the Start /
Stop button on the Local control panel to activate the
electric system and the fuel pump. When more time is
needed to bleed, hold the Start / Stop button on the Local
control panel pushed. Hold as long as necessary to bleed
the system. Retighten the bleed screw when no further air
bubbles are expelled.
Figure 10: Bleeding fuel lines 1 = Fuel bleeding screw
4.2.3
Valve clearance
When the engine is in cold condition both valves (inlet and
outlet) should have a clearance between 0.25 mm. The
adjustment has to be done at TDC (refer to § 5.4.2).
4.2.4
Replacing fuel filter
Filter change depends on contamination of the fuel, but
should be done however, at least every 1000 running
hours. Before changing the filter, clamp off the supply line.
Remove the hoses from filter and attach them on the new
filter again. The arrow on the filter housing indicates the
direction of the flow. A clogged filter results in a lack of
output of the generating set.
4.2.5
Replacing oil filter
The oil filter is in front of the service side. Replacement
has to be executed according to the schedule in this
manual. Drain the oil using the sump pump and put some
tissues under the filter.
Figure 11
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