Battery Test Charging; Regulator/Rectifier Output Voltage Inspection - Dinli DL702 Service Manual

ELECTRICAL SYSTEM

Battery Test Charging

● If the battery is suspected of being defective, sulfated, or unable
to take a charge, consult the table.
● To test charge a battery, perform the ordinary charging procedure
and monitor the battery voltage and other signs as mentioned
below.
If the battery voltage suddenly jumps to over 13 V just after the
start of charging, the plates are probably sulfated. A good
battery will rise to 12 V immediately and then gradually go up
to 12.5 or13 V in about 30 min. to an hour after the start of
charging.
● If there does not appear to be enough sediment in a cell to short
the plates, but that cell has a very low specific gravity after the
battery is fully charged, the trouble may be that there is not
enough acid in that one cell. In this case only, sulfuric acid
solution may be added to correct the specific gravity.
If a fully charged battery doesn't lose its charge after 2 to 7 days;
or if the specific gravity drops markedly, the battery is defective.
The self-discharge rate of a good battery is only about 1% per
day.
Regulator / Rectifier Output Voltage Inspection
● Check the battery condition (see Battery section)
● Warm up the engine to obtain actual alternator operating
conditions.
● Check that the ignition switch is turned off, and connect the hand
tester to the battery terminal.
● Start the engine, and note the voltage readings at various engines
speeds with the headlight turned on and then turned off. The
readings should show nearly battery voltage when the engine
speed is low, and as the engine speed rises, the readings should
also rise. But they must be kept under the specified voltage.
Regulator/ Rectifier Output Voltage
Tester Range
Tester (+) to
25 V DC Battery (+)
● Turn off the ignition switch to stop the engine, and disconnect the
hand tester.
If the regulator/rectifier output voltage is kept between the values
given in the table, the charging system is considered to be
working normally.
If the output voltage is much higher than the values specified in
the table, the regulator/rectifier is defective or the regulator
/rectifier leads are loose or open.
Connections
Tester (-) to
Battery (-)
【7-8】
Reading
14 ~ 15 V