Test Procedures - jcb JS300 Service Manual

High Rate Discharge Test
This test is to determine the electrical condition of the
battery and to give an indication of the remaining useful
`life'. Before testing ensure that the battery is at least 75%
charged (SG of 1.23 to 1.25 for ambient temperature up to
27°C).
Ensure that the battery is completely disconnected from
the machine.
Fig 4. Battery Tester
Check:
1 Connect the battery tester to the battery. Ensure that
the positive terminal is connected first.
2 Use rocker switch A to select the correct battery
voltage.
3 Hold switch B to the 'Check' position. The battery no-
load voltage should be at least 12.4 volts.
Test:
1 Hold down switch B to the 'Load' position for 5-10
seconds until the meter reading stabilises. The
reading should be at least 9 volts.
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Test Procedures

Note: Do not hold the switch in the LOAD position for more
than 10 seconds.
Check the results against the table:
Table 2. Tester Readings and Remedies
Battery Tester Readings
CHECK: 0 - 12.6 volts
LOAD: Less than 6 volts
CHECK: 6 - 12.4 volts
LOAD: less than 9 Volts and
falls steadily but remains in
yellow zone.
CHECK: less than 10 volts
LOAD: Less than 3 volts
CHECK: more than 11 volts Charge battery which will
LOAD: 6 - 10 volts
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Section C - Electrics
Charging System
Test Procedures
Remedy
Renew battery
Recharge and re-test. If
tests still unsatisfactory
renew battery.
Indicates battery has been
over-discharged and
unlikely to recover. Renew
battery.
probably recover.
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