MODERN BURNER UNIT (MBU)
UNIT MAINTENANCE PROCEDURES
THIS SECTION COVERS:
Battery Pack disconnected from external power source
Tool s and Special Tools
Shop Equipment Automotive Maintenance and Repair:
Organizational Maintenance, Common No. 1 (WP 0038, Table 2, Item 2)
Multimeter (WP 0038, Table 2, Item 3)
This procedure contains information and instructions to keep the battery pack in good working order by
inspecting and replacing the batteries.
Inspect the outer casing of the lead acid batteries inside the Battery Pack for any damage that could lead
to leaking. Check the condition of the battery terminals for corrosion. Remove the power lead terminal
and clean as necessary.
If the Battery Pack is not capable of powering the MBU for a length of time consistent with the
specification (WP 0005), one or both of the batteries may be defective and require replacement. To
determine the status of the batteries, attempt to charge the battery pack until the Ready indicator is lit. If
the Ready indicator does not light after approximately 2 hours of charging, discontinue the charging
operation and disconnect the power source from the Power Input connector. Remove the Battery Pack
cover and disconnect the power leads that extend from the charger to the battery terminals so that the
batteries are no longer connected to the charger or each other. With a Multimeter set to measure DC
Volts, place the (+) positive lead of the Multimeter on the (+) positive terminal of the battery and the (-)
negative lead of the Multimeter on the (-) negative terminal of the battery. Read the output voltage of the
battery on the Multimeter. If the voltage is 11 V DC or less, the battery is most likely no longer capable of
holding a full charge and requires replacement.
Two Person Lift
The Battery Pack weighs approximately 80 pounds (36.3 kg). Two persons must carry the
Battery Pack, lifting with legs, not back, to prevent injury.