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Z001019/0_6_July 2008
Page ELECTRICAL SYSTEM - 7
06 ELECTRICAL SYSTEM
SERVICE MANUAL MARINE ENGINES
For 6 cyl. engines only (old version till eng. no. 68224418)
01.03 ill.3
circuit diagr.:
Check of control voltage and/or alternator voltage:
NOTE:
For these works, the battery's state of charge should be 95% at least.
Check tension of belt on alternator drive and make sure that cables are perfectly connected.
1. Disconnect all electrical consuming devices and adjust engine to a speed of approx. 1000 rpm.
2. Connect voltmeter to alternator output "B +".
3. Remove plastic screw on governor and apply screw driver with fine blade on adjusting screw.
ATTENTION:
The adjusting screw has a min./max. stop. There is danger to damage the governor
when turning by force the adjusting screw so far that it overtravels the specified
control range.
4. Turn screwdriver clockwise to increase the operating voltage and/or anticlockwise to lower the
operating voltage. Adjust voltage range between 14,0 and 14,2 volt (28,0 to 28,4 volt for 24-volt plants).
ATTENTION:
Do not turn adjusting screw so far that it overtravels the stop, to prevent
damages to the governor.
5. After adjustment, remove screwdriver and voltmeter and lock the governor by means of removed plastic
screw.
If voltage cannot be set to specified value, replace governor and/or alternator.
01.03 ill.2
Governor
Check of alternator and connections:
With engine stopped, measure voltage on alternator (+output and -output).
Measured voltage may be lower than the battery voltage by (up to) 1 volt only.
Where appropriate, test wiring of cables and connections.
Check of slip pistons:
Disconnect battery and/or main switch.
Unscrew governor. Clean slip ring and wipers; where appropriate, replace wipers.
ToC
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