LiuGong CLG835H, Service Manual

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8-17
January 24, 2017 Structure Function Principle
CLG835H Power System
4. Connect the charger positive (+) clip to the
battery positive (+) terminal, while charger
negative (-) clip to the battery negative (-) ter-
minal at room temperature. Confirm that the
battery terminals are clean, and the charging
circuit is in good connection.
5. Charge the battery with the charger of 16.0V
(within 16.2V) constant voltage until the bat-
tery hydrometer turns green. The green
hydrometer indicates that the battery is fully
charged.
6. On condition that constant voltage is unavail-
able, use constant current instead. Charge
the battery with 12A charging current until the
battery hydrometer turns green. The green
hydrometer indicates that the battery is fully
charged.
The relative relationship of auxiliary charging
time with voltage of battery:
7. For the battery suffering severe power loss, it
may be non-chargeable at the beginning of
charging. As battery charging proceeds, the
charging current of battery can return to nor-
mal gradually. It takes about 14 hours to com-
plete the charging process.
8. If the battery temperature gets too high
(approximately 45 °C) during the charging
process, stop charging the battery until the
battery is cooled to room temperature, then
recharge it through halving the charging cur-
rent.
9. Check the hydrometer state once every hour
during battery charging. The green battery
hydrometer indicates that the battery has
been fully charged, and stops charging at this
time.
10. Coat the terminal with Vaseline after the
charging is completed, to prevent galvanic
corrosion.
Precautions for battery charging
1. Never charge two batteries in series.
2. Maintain a ventilated environment during
charging, and charge at a normal tempera-
ture.
3. If acid is sprayed from the battery vent during
charging, the charging shall be stopped
immediately.
4. Charge the battery in well-ventilated area,
and pay attention to the electrical safety.
5. Any battery that leaks or has a broken hous-
ing, shall rather be scrapped than recharged.
6. Any battery that has a broken terminal, shall
rather be scrapped than recharged.
7. Any battery that is inflated or bulged for over-
discharge or overcharge, shall rather be
scrapped than recharged.
8. If the hydrometer remains black after being
charged for a period of time, check whether
the charging cable is well connected, the joint
point is clean, or the charging voltage
reaches 16V.
Steps of battery troubleshooting
The machine is in braking state, while the shift
control lever is in neutral position. The densime-
ter mounted inside the battery cover is green.
The test in this step need assist of partner.
1. Turn the negative switch to position "0".
2. Turn the digital multimeter to 50 V of voltage
position.
Battery
voltage 12.45~12
.55V
12.45~12
.35V
12.45~12
.20V
12.45~12
.05V
Recharg-
ing time
2 hours 3 hours 4 hours 5 hours
Battery
voltage 12.45~11
.95V
11.95~11.
80V
11.80~11.
65V
11.65~11.
50V
Recharg-
ing time
6 hours 7 hours 8 hours 9 hours
Battery
voltage 11.50~11.
30V
11.30~11.
00V
Below
11.00V
Recharg-
ing time
10 hours 12 hours 14 hours