Gilera Nordwest, Workshop Manual

Page: 99 / 136

. BATTERY VOLTAGE
With the engine on “OFF” position, place the voltmeter red colour lead on the
battery positive (+) terminal and the black colour lead on the battery negative
(-) terminal. Battery voltage should be 12 ÷ 13 V.
When battery voltage is lower than 11 V, check the charging system.
Warning:
When the battery voltage is lower than 6 V, automatically a device will
stop the ignition.
BATTERY CHARGING
When the battery electrolyte specific gravity is too low, it is necessary to
charge the battery. Battery must be carried out with a slow charge, never with
a quick charge.
Remove the battery plugs.
Connect the positive (+) cable to the battery positive (+) terminal; connect the
negative (-) cable to the battery negative (-) terminal.
Charge the battery to the specific gravity 1,290 at 20°C with a charging
maximum current of 1.4 A. (10 hours).
After charging, the voltmeter indicator must be constant for at least an hour.
After charging, wash the battery with water.
Periodically check the electrolyte level.
CHARGING SYSTEM
Leakages checks
Prior to the regulated voltage check, control an eventual current leaks.
Turn the ignition switch to “OFF” position.
Disconnect the battery ground cable.
Connect the ammeter between the ground cable and the battery negative (-)
terminal. With the ignition switch in the “OFF” position, the ammeter must
indicate 0 ampere.
Charge circuit check
Before the following check procedures, ensure that the battery is in working
condition.
Warm up the engine.
Remove the saddle.
Connect the voltmeter (fig. 2).
Keep engine running at idle speed.
Slowly increase engine speed.
The regulated voltage should be 13.5 ÷ 14 V.
If the voltmeter indicates a different voltage, check the eventual wires for
disconnection or breaks.
If the wires are in perfect condition, replace the regulator rectifier and repeat
the same check. If voltage is still incorrect, check the alternator stator coil.
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