Terex Fermec 760 - BATTERY DIAGNOSTIC TEST

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Diagnostic test with the battery still on the machine
Fault : Battery performance seems poor
Proceed with battery test ➞ Test complete. Battery OK
Stop battery test-reject the battery or test alternator/starter motor
1.1 - Check open
circuit voltage refer
to 4003-6.
Above 12.5 volts ?
YES
2.1 - Test charging
system voltage
should be
14.2 +/- 0.2 volts
YES
3.1 - Check quies-
cent current drain. It
should be ZERO
with all electrical
systems switched
off
YES
4.1 - Connect
voltmeter across
battery terminals
and disconnect wire
from the fuel
injection pump.
Crank engine in the
normal way and
read the battery
voltage while the
starter motor is
operating.
Voltage should be :
10 volts minimum at
ambient
temperatures above
5
°
C
9 volts minimum at
ambient
YES
1.2 - Recharge
battery
see page 6 or 7
NO
1.3 - Test open cir-
cuit voltage.
Above 12.5 volts ?
YES
1.4 - Load test
10 volts or above ?
YES
NO
NO
2.2 - Test
alternator output
NO
2.3 - Check if there
are dealer/customer
fitted accessories
such as clock or
theft alarm. If so, is
current drain less
than 20 milli-amps ?
NO
YES
NO
3.3 - Additional leak-
age occurring in the
circuit. Ensure top of
battery is clean and
dry. Check wiring
insulation for dam-
age, between bat-
tery and key switch
NO
4.2 - Remove
battery from the
machine and do a
load test
Battery passed
test ?
NO
4.3 - Fault lies
in alternator
or starter
motor
YES
-
START
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