MAINTENANCE
Nobles Speed Scrub 500 (09-2020)
29
BATTERIES
FOR SAFETY: Before servicing machine, stop on
level surface, turn off machine, remove key and set
parking brake if equipped.
The lifetime of the batteries depends on their proper
maintenance. To get the most life from the batteries;
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Do not charge standard wet lead-acid batteries more
than once a day and only after running the machine
for a minimum of 15 minutes.
TPPL batteries can be opportunity charged during
the day to extend run time.
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Do not leave the batteries partially discharged for
long period of time.
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Only charge the batteries in a well-ventilated area to
prevent gas build up.
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Charge batteries in areas with temperatures between
32ºF/0ºC and 80ºF/27ºC.
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Allow the charger to complete charging the batteries
before re-using the machine.
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Maintain the proper electrolyte levels of flooded (wet)
batteries by checking levels weekly.
Your machine is equipped with either flooded (wet)
lead-acid or maintenance-free (Sealed AGM/TPPL)
batteries supplied by Tennant.
FOR SAFETY: When servicing machine, keep all
metal objects off batteries. Avoid contact with
battery acid.
MAINTENANCE-FREE BATTERIES
Maintenance-free (Sealed AGM/TPPL) batteries do not
require watering. Cleaning and other routine
maintenance is still required.
FLOODED (WET) LEAD-ACID BATTERIES
The flooded (wet) lead-acid batteries require routine
watering as described below. Check the battery
electrolyte level weekly.
NOTE: If machine is equipped with the automatic or
manual battery watering system, proceed to the
BATTERY WATERING SYSYEM instructions.
The electrolyte level should be slightly above the
battery plates as shown before charging (Figure 70).
Add distilled water if low. DO NOT OVERFILL. The
electrolyte will expand and may overflow when
charging. After charging, distilled water can be added
up to about 3 mm (0.12 in) below the sight tubes.
Before Charging
After Charging
FIG. 70
NOTE: Make sure the battery caps are in place while
charging. There may be a sulfur smell after charging
batteries. This is normal.
CHECKING CONNECTIONS / CLEANING
(ALL BATTERY TYPES)
After every 200 hours of use, check for loose battery
connections and clean the surface of the batteries,
including terminals and cable clamps to prevent battery
corrosion. Use a scrub brush with a strong mixture of
baking soda and water (Figure 71). Do not remove
battery caps when cleaning batteries.
FIG. 71
CHARGING BATTERIES
The charging instructions in this manual are intended
for the battery charger supplied with your machine. The
use of other battery chargers that are not supplied and
approved by Tennant are prohibited.
If your machine is equipped with an off-board battery
charger refer to the charger's owners manual for
operating instructions. Contact distributor or Tennant
for battery charger recommendations if machine is not
equipped with charger.
