FORM NO. 56043071 CMAX
™
28/34ST / I-MAX 28/32C, BA 750/850ST, BA 750C - 53
ELECTRICAL SYSTEM
DESCRIPTION OF THE BATTERY CONDITION INDICATORS
The Battery Condition Indicator (J) will give an indication of the state of charge of the batteries. The battery condition indicator will retain the state-of-charge even
if the key has been turned off. The state-of-charge indication is reset to full charge when the batteries have been recharged. It is also possible to choose between
two different low voltage thresholds depending on whether maintenance free or standard batteries are being used (have qualified service engineer perform
this selection*). NOTE: The following percentages are based on useable battery capacity not total battery capacity. Therefore, 100% discharge = 80% of total
battery capacity for standard wet cell batteries or 70% of total battery capacity for maintenance free batteries.
Explanation of Battery Indicator Lights and Voltage Ranges
36 volt machines 24 volt machines
% of
Battery Indicator Discharge Standard Alternate Standard Alternate
Green Full to 50% 34.0+ 34.5+ 22.6+ 23.0+
Green & Yellow 50% to 75% 33.0-34.0 34.0-34.5 22.0-22.6 22.6-23.0
Yellow 75% to 90% 32.0-33.0 33.5-34.0 21.3-22.0 22.3-22.6
Yellow & Red 90% to 95% 31.5-32.0 33.0-33.5 21.0-21.3 22.0-22.3
Red 95% to 99% 31.0-31.5 32.5-33.0 20.6-21.0 21.6-22.0
Flashing Red/Cutoff 100% <31.0 <32.5 <20.6 <21.6
*Important Note: See the Main Control Board Special Program Options manual section (located in the Electrical System) and follow the instructions for changing
the low voltage cutout threshold.
CHARGING THE BATTERIES
Charge the machine’s battery pack each time the machine is used, or when the Battery Condition Indicator (J) is showing red flashing indicator
lights. Note: The machine also uses a special low voltage cutout that inhibits the scrub system see in this manual section the description for the
low voltage cutout feature.
To Charge the Batteries...
1 Drain the recovery tank, next lift open the hinged tank setting the prop rod. Locate the machine/battery pack connector assembly (9).
2 Pull up (separate) the top removable battery pack connector half then push together both the battery charger and battery pack connectors.
3 Follow the instructions on the battery charger.
4 Check the fluid level in all the battery cells after charging the batteries. Add distilled water, if necessary, to bring the fluid level up to the
bottom of each battery cells filler tubes.
WARNING!
Do not fill the batteries before charging. Only charge batteries in a well-ventilated area. Do not smoke while servicing the batteries.
BATTERY MAINTENANCE
Proper maintenance of electric vehicle batteries can greatly extend their life. Well-maintained batteries may last up to 3 years, but failure after
1 year is common if maintenance has been poor.
There are 3 simple rules for good battery maintenance:
• Maintain Proper Electrolyte Level (Weekly) - Use distilled water in batteries whenever possible. If batteries are discharged, add just
enough water to cover the plates in each cell. If batteries are fully charged, fill each cell to the bottom of the filler tube. Do not over-fill the
batteries! Do not add acid to batteries!
• Keep the Batteries Charged (Weekly) - Batteries should be charged each time that a machine is used for more than 1 hour. Machine
operators should open the battery compartment cover for charging, to avoid a concentrated build-up of hydrogen gas. Operators should
follow the instructions provided with their specific battery charger, to determine how long the batteries should be charged. Even when a
machine is stored, the batteries should be charged once a month to prevent the batteries from “sulfating”. Almost all battery caps are vented,
so there’s no need to loosen or remove them for charging.
• Keep the Batteries Clean (Monthly) - Use a damp cloth to wipe dirt from the top of the batteries. Battery terminals must be clean and tight.
If the tops of the batteries are wet after charging, the batteries have probably been over-filled or over-charged. Note: If there is acid on the
batteries, wash the tops of the batteries with a solution of baking soda and water (2) tablespoons of baking soda to 1 quart of water.
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