16. BATTERY/CHARGING SYSTEM/
A.C. GENERATOR
16-2
MXU 300/250
SERVICE INFORMATIONN
GENERAL INSTRUCTIONS
• The battery can be charged and discharged repeatedly. If a discharged battery is not used for a
long time, its service life will be shortened. Generally, the capacity of a battery will decrease
after it is used for 2～3 years. A capacity-decreased battery will resume its voltage after it is
recharged but its voltage decreases suddenly and then increases when a load is added.
• When a battery is overcharged, some symptoms can be found. If there is a short circuit inside the
battery, no voltage is produced on the battery terminals. If the rectifier won‘t operate, the voltage
will become too high and shorten the battery service life.
• If a battery is not used for a long time, it will discharge by itself and should be recharged every 3
months.
• A new battery filled with electrolyte will generate voltage within a certain time and it should be
recharged when the capacity is insufficient. Recharging a new battery will prolong its service life.
• Inspect the charging system according to the sequence specified in the Troubleshooting.
• Do not disconnect and soon reconnect the power of any electrical equipment because the electronic
parts in the regulator/rectifier will be damaged. Turn off the ignition switch before operation.
• It is not necessary to check the MF battery electrolyte or fill with distilled water.
• Check the load of the whole charging system.
• Do not quick charge the battery. Quick charging should only be done in an emergency.
• Remove the battery from the machine for charging.
• When replacing the battery, do not use a traditional battery.
• When charging, check the voltage with a voltmeter.
SPECIFICATIONS
Item Standard
Capacity/Model 12V−12AH
Voltage Fully charged 13.1V
(20℃) Undercharged 12.3V
Charging current STD: 1.2A Quick: 3.0A
Battery
Charging time STD: 5～10hr Quick: 30min
MXU 300 200 W/5000 RPMCapacity
MXU 250 150 W/5000 RPM
A.C. Generator
Charging Limit voltage 13.5～15.5V
TORQUE VALUES
A.C.G. flywheel nut 6 kgf-m (60 Nm, 43 lbf-ft)
SPECIAL TOOLS
Flywheel holder E021
Flywheel puller E003
The battery electrolyte (sulfuric acid) is poisonous and may seriously damage the skin and
eyes. Avoid contact with skin, eyes, or clothing. In case of contact, flush with water and get
prompt medical attention
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