wsm Kubota L4100, Workshop Manual

Page: 324 / 346

ELECTRICAL SYSTEM L4100, WSM
9-S7
(EU)
Battery Specific Gravity
1. Check the specific gravity of the electrolyte in each cell with a
hydrometer.
2. When the electrolyte temperature differs from that at which the
hydrometer was calibrated, correct the specific gravity reading
following the formula mentioned in
(Reference) .
3. If the specific gravity is less than 1.215 (after it is corrected for
temperature), charge or replace the battery.
4. If the specific gravity differs between any two cells by more than
0.05, replace the battery.
NOTE
• Hold the hydrometer tube vertical without removing it from
the electrolyte.
• Do not suck too much electrolyte into the tube.
• Allow the float to move freely and hold the hydrometer at
eye level.
• The hydrometer reading must be taken at the highest
electrolyte level.
(Reference)
• Specific gravity slightly varies with temperature. To be exact,
the specific gravity decreases by 0.0007 with an increase of
1 °C (0.0004 with an increase of 1 °F) in temperature, and
increases by 0.0007 with a decreases of 1 °C (0.0004 with a
decrease of 1 °F).
Therefore, using 20 °C (68 °F) as a reference, the specific
gravity reading must be corrected by the following formula:
–
Specific gravity at 20 °C = Measured value + 0.0007 ×
(electrolyte temperature
− 20 °C)
– Specific gravity at 68 °F = Measured value + 0.0004 ×
(electrolyte temperature
− 68 °F)
At an electrolyte temperature of 20 °C (68 °F)
WSM000001ELS0002US0
(2) Main Switch
Connector Voltage
1. Measure the voltage with a voltmeter across the connector B
terminal and chassis.
2. If the voltage differs from the battery voltage (11 to 14 V), the
wiring harness is faulty.
9Y1210278ELS0025US0
Specific Gravity State of Charge
1.260 Sp. Gr. 100 % Charged
1.230 Sp. Gr. 75 % Charged
1.200 Sp. Gr. 50 % Charged
1.170 Sp. Gr. 25 % Charged
1.140 Sp. Gr. Very Little Useful Capacity
1.110 Sp. Gr. Discharged
(a) Good
(b) Bad (c) Bad
Voltage
Connector B terminal
– Chassis
Approx. battery voltage
(a) From Battery Positive Terminal
KiSC issued 08, 2012 A