Gilera Runner Purejet 2007, Workshop Manual, Page: 52 / 257

should be about 1.27, corresponding to 31° Bé, and the values have stabilised. The duration of the
charging operations must be 15 - 20 hours.
4) Once the charging is complete, level out the acid (add distilled water or remove excess acid), put
on the caps and clean carefully.
5) Once these operations have been completed, install the battery on the vehicle, correctly following
the connections described in point 3) « Battery charging ».
WARNING
- ONCE THE BATTERY HAS BEEN INSTALLED IN THE VEHICLE IT IS NECESSARY TO REPLACE
THE SHORT TUBE (WITH CLOSED END) NEAR THE + POSITIVE TERMINAL WITH THE CORRE-
SPONDING LONG TUBE (WITH OPEN END), THAT YOU FIND FITTED TO THE VEHICLE, TO
ENSURE THAT THE GASES THAT FORM CAN ESCAPE PROPERLY.
Specific tooling
020333Y Single battery charger
020334Y Multiple battery charger
Battery maintenance
The battery is the electric device that requires the
most careful monitoring and diligent maintenance.
The maintenance rules are:
1) Check the level of the electrolyte
Check regularly that the electrolyte level is at up-
per level. Use only distilled water to top up the
level.
If the battery needs topping up very frequently,
check the vehicle electrics: the battery is probably
working in overload conditions which will lead to
rapid deterioration.
2) Check the charge
After topping up the electrolyte, check the density
using a densimeter (see figure).
CHECKING ELECTROLYTE DENSITY
Specification Desc./Quantity
Keep the tube vertical
Check with bare eye
The float must be released
When the battery is charged, the density should be 30 ÷ 32 Bé corresponding to a specific weight of
1.26 ÷ 1.28 at a temperature not under 15° C.
If the density falls below 20° Bé, the battery is completely run down and needs to be recharged. When
a battery is being charged the voltage of each element must be 2.6 ÷ 2.8V.
The discharge limit of each element is 1.8V.
Electrical system
Runner Purejet
ELE SYS - 52