4
L / M . . / 07.96
Trouble-shooting table for electrical system
Trouble-shooting at the battery
Malfunction
Corroded terminal
clips.
Battery is
overcharged.
Acid level is too low.
Indication
Inadequate current
flow, white salt depo-
sits.
Voltage at terminals
is always above
16.5 V with 12 V
nominal voltage (or
above 33 V with 24 V
nominal votage), spe-
cific gravity of acid is
above 1.285 kg/l so
that the battery boils.
Acid is escaping from
the cell plugs.
Acid level less than
10 mm (0.4 in) below
top of cell plates.
Cause
Sulphuric acid attacs
metals (except lead).
Charging voltage too
high.
Capacity of chosen
battery is too small.
Engine run continuous-
ly (several days) with
very little electrical
consumption (e.g. as a
boat engine).
Defect in voltage regu-
lator or generator.
Acid level is too high.
Overloading or natural
water loss by evapora-
tion (particularly in
summer).
Remedy
Wash down terminals
with hot soda lye (but this
must not enter the bat-
tery!), rinse with cold
water and apply acid-resi-
stant grease.
Check voltage regulator,
renew if necessary.
Install a battery of larger
capacity. As a temporary
measure, discharge the
battery at intervals, e.g.
by switching on an elec-
trical consumer when the
engine is not running.
Install a voltage regulator
with a different characte-
ristic (lower charge-end
voltag
Have the voltage regulator
and generator checked,
renew defective compo-
nents.
Siphon off excess acid.
Add distilled water or
demineralised water.
To Next Page
Loading...
Need help?
General
