Zetor 86 41 forterra turbo, Operator'S Manual

Page: 203 / 257

203
ELECTRICAL SYSTEM
STORAGE BATTERY CHARGING AND
MAINTENANCE
A) Charging in and off the vehicle
1. Systematic over and undercharging
of the battery is harmful fir the battery
and shortens its service life. The cor-
rect setting charging kit keeps the
battery close to its fully charged
status. With the set voltage level
(13,8 - 14,4 V) and average fre-
quency of drives it is sufficient just to
check and replenish the electrolyte
level with distilled water by 6-month
periods.
2. In the case of more demanding drive
mode and another level of regulated
voltage, the electrolyte level has to
be checked more frequently. Over-
charging the battery in the vehicle
(more than 14,4 V) results in a con-
siderable loss of electrolyte.
3. The storage battery removed from
the vehicle or in the vehicle out of
operation must be charged! (See
Storing the charged batteries with
electrolyte). It also suits to charge the
battery in the vehicle before and after
winter period. In the case of heavy
frosts, the nearly uncharged batteries
(1,12 - 1,15 g/cm
3
electrolyte density)
may even freeze, which essentially
shortens its service life.(disintegration
of the active substance, breakage of
battery block. The heavily discharged
storage battery (electrolyte density
lower than 1,07 g/cm
3
) may already
freeze at few degrees below zero.
4. The batteries shall be charged with
current equal to 0,1 of overall capac-
ity (or lower) up to the fully charged
status.
5. Charging equipment of constant 14.4
V voltage may also be used for
charging for the maximum time pe-
riod of 30 hours depending on the
discharge level.
6. Fully discharged battery shall be
charged as soon as possible. Other-
wise it is impossible to restore its full
capacity.
B) Symptoms of charged status
1. The battery shall be considered as
fully charged if all the cells generate
gas equally, the electrolyte shows the
1,28 g/cm
3
density in all cells, and the
overall battery voltage, when meas-
ured with the passage of the pre-
scribed charging current keeps within
15,3 - 16,5 V limits.
2. The full charged status is also testi-
fied with the same level of the got
electrolyte density and voltage taken
in the two oncoming measurements
made after two hours of charging.
3. Informative example of the charging
status = electrolyte density. The
charging status is characterized with
the electrolyte density and it is meas-
ured with charge indicators in each of
the battery cells.
Charging status = El. density
Charging status Electrolyte density
100 % 1,28 g/cm
3
70 % 1,23 g/cm
3
50 % 1,20 g/cm
3
20 % 1,15 g/cm
3
0 % 1,12 g/cm
3
C) Storing the charged batteries con-
taining electrolyte
1. Before the storing, the batteries must
be charged to the final symptoms of
full charging, disconnected from the
the charging mains, cleaned and their
plugs must be put on.
2. The batteries with polypropylene
vessels shall every 3 months of stor-
ing because of the less self-
discharging process.
3. Intervals of checking the electrolyte
for conditions: In the course of
charging or at least every 6 months
replenish with the distilled water only!
In case continuously connected ap-
pliances are installed in the machine
independently on the switch box in
OFF position (for instance Warning)
the charge status – i-e- rest voltage
and electrolyte density - shall be re-
vised monthly as minimum.