Motor Maintenance; Battery Maintenance - Tennant 1610 Operator's Manual

6. Lubricate the caster grease fittings with a water
resistant grease (Figure 42).
FIG. 42
7. Lubricate all pivot points with silicone spray then
coat with a water resistant grease to maintain
smooth operation.
8. Check the machine for water leaks and loose nuts
and bolts.
9. Periodically check the belt tension on the two
brush motors. Tighten the belt if you're able to
twist it beyond 90° at midpoint (Figure 43).
FOR SAFETY: When servicing machine,
disconnect the battery connections.
FIG. 43

MOTOR MAINTENANCE

Quarterly (Every 250 Hours) -- Check the drive
transaxle motor and vacuum motors for carbon brush
wear. Replace carbon brushes when worn to a length
of 10 mm or less.
Annually (Every 1000 Hours) -- Check the brush
motors for carbon brush wear. Replace carbon
brushes when worn to a length of 10 mm or less.
Contact an Authorized Service Center for
machine repairs.
FOR SAFETY: When servicing machine, all repairs
must be performed by a qualified service person.
Tennant 1610 (10- -05)
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WARNING: Electrical Shock Hazard.
Disconnect Battery Cables Before Servicing
Machine.

BATTERY MAINTENANCE

WARNING: Fire Or Explosion Hazard.
Batteries Emit Hydrogen Gas. Keep Sparks And
Open Flame Away. Keep Battery Compartment
Open When Charging.
FOR SAFETY: When servicing machine, wear
protective gloves and eye protection when
handling batteries and battery cables. Avoid
contact with battery acid.
1. Check the specific gravity using a hydrometer to
determine the charge level and the condition of the
batteries (Figure 44). If one or more of the battery
cells read lower than the other battery cells (0.050
or more), the cell is damaged, shorted, or is about
to fail. Check the hydrometer readings against the
following chart to determine the remaining battery
charge level.
NOTE: Do not take readings immediately after adding
distilled water. If the water and acid are not thoroughly
mixed, the readings may not be accurate.
SPECIFIC GRAVITY
at 27° C
1.265
1.223
1.185
1.148
1.110
NOTE: If the readings are taken when the battery
electrolyte is any temperature other than 27_C, the
reading must be temperature corrected. Add or
subtract to the specific gravity reading 0.004, 4 points,
for each 6_C above or below 27_C.
2. Always follow proper charging instructions
(See CHARGING BATTERIES).
OPERATION EN
FIG. 44
BATTERY
CHARGE
100% CHARGED
75% CHARGED
50% CHARGED
25% CHARGED
DISCHARGED
21