MAINTENANCE MANUAL OF GW4D20/GW4D20B TURBOCHARGED DIESEL ENGINES
464
Great Wall Baoding Internal Combustion Engine
Manufacturing Company Limited
Fig. 11-1-1 Checking the storage battery
electrolyte level
2.2 Filling Electrolyte
(1) Make sure the vent holes on the story battery plug
are penetrated. Remove the packing and sealing paper
under the exhaust cock after filling electrolyte.
(2) Do not fill the electrolyte into the storage battery
until the liquid temperature cools down below 30
℃
.
(3) Fill the prepared electrolyte into each cell till the
liquid level in plastic container is parallel to the mark of
―Max‖ on the housing, and the liquid level in rubber
container is 10 to 15 mm above the baffle plate.
(4) Tighten the exhaust cock to avoid leakage.
3. Charging the Storage Battery
3.1 Charging Equipment
Caution:
Only DC power supply is applicable for
charging storage battery.
(1) Rectifier
The widely used rectifiers are dry type rectifiers (copper-oxide rectifier, selenium rectifier, silicon rectifier),
gaseous rectifier (tungsten lamp rectifier) and mercury rectifier. Their input AC voltage is generally 110 V
or 220 V, and the nominal output voltages are 6 V, 12 V and 24 V. Dry type rectifiers are convenient to
use and can be unattended during charging, therefore are widely used.
(2) Controlled silicon voltage regulation charger
The controlled silicon voltage regulation charger applies power supply of 220 V AC which is transformed
to direct current through controlled silicon rectifier and charges storage battery from output end. The DC
output voltage is 0 to 220V and the electric current is 0 to 40 A.
3.2 Detecting Instruments
Densimeter, thermometer, voltmeter, amperemeter and other detecting instruments and necessary tools
are generally used for storage battery charging and daily maintenance.
3.3 Charging the Storage Battery
(1) Preparations before charging
——Check if the electrolyte or pure water complies with related prescription.
——Remove the exhaust cock on storage battery.
——Fill the electrolyte or pure water up to the specified level line.
(2) Charge connection
The positive pole of the charger is connected with that of the storage battery, and the negative pole of
the charger is connected with that of the storage battery. Don’t reverse the connection. For most storage
batteries, the charge can be determined according to the charger power. The charge connection must be
firm and reliable.
(3) Charging modes
Generally there are constant-current charge, constant-voltage charge and quick charge.
The constant-current charge includes initial charge, supplementary charge, normal charge and
equalizing charge.
