Fayat Group BOMAG BW 190/202 AD-5 Service Manual page 38

General – Maintenance and repair
Generator
Starter
38
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Always keep battery poles and terminal clams clean to avoid
high transition resistances when starting and the related devel-
opment of heat.
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Make sure the battery is properly fastened in the vehicle.
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Before removing the generator you must disconnect the ground
cable from the minus pole of the battery while the ignition is
switched off. Do not disconnect the generator while the engine
is running, because this may cause extremely high voltage
peaks in the vehicle wiring system ("Load Dump"), which could
possibly damage control units, radios or other electronic equip-
ment.
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When removing the battery cable, the B+-nut underneath on
the generator side may also be loosened. This nut must in this
case be retightened.
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When connecting e.g. the battery cable to the terminal of the
generator you must make sure that the polarity is correct (gen-
erator B+ to the + pole of the battery). Mixing up the polarities
by mistake causes short circuit and damage to the rectifier ele-
ments - the generator will be out of function.
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The generator can only be operated with the battery con-
nected. Under special conditions emergency operation without
battery is permitted, the lifetime of the generator is in such
cases especially limited.
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Plus and minus cables must be disconnected during rapid
charging of the battery or electric welding on the vehicle.
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When cleaning the generator with a steam or water jet make
sure not to direct the steam or water jet directly on or into the
generator openings or ball bearings. After cleaning the gener-
ator should be operated for about 1 - 2 minutes to remove any
deposits of water from the generator.
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So-called jump starting (using an additional external battery)
without the battery connected is dangerous. When discon-
necting the cables from the poles high inductivities (arcs,
voltage peaks) may occur and destroy the electrical installa-
tion.
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For purposes like e.g. purging the fuel systems, starters may
be operated for maximum 1 minute without interruption. Then
you should wait for at least 30 minutes (cooling down) until
trying again. During the 1 minute starting period this process
should not be interrupted.
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Starter motors must not be cleaned with high pressure steam
cleaning equipment.
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The contacts on starter terminals 30, 45, 50 must be protected
against unintended shorting (jump protection).
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When replacing the starter the ring gear on the engine flywheel
must be checked for damage and its number of teeth - if nec-
essary replace the ring gear.
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Always disconnect the battery before starting assembly work in
the starter area of the engine or on the starter itself.
BW 190/202 AD-5 / BW 190/202 ADO-5