Tennant V-WD-16B Operator's Manual page 12

OPERATION
EN
MONTHLY MAINTENANCE
(Every 80 Hours of Use)
1. Check the fluid level in each battery cell
(See BATTERY MAINTENANCE).
2. Clean battery tops to prevent corrosion
(See BATTERY MAINTENANCE).
3. Check for loose or corroded battery cables.
4. To maintain maximum performance, wash the cloth
filter bag by hand with a mild detergent. Let bag dry
thoroughly before replacing.
5. Lubricate wheels and front swivel casters with a
water resistant oil.
6. Check machine for loose nuts and bolts.
QUARTERLY MAINTENANCE
(Every 250 Hours of Use)
Check the motor for carbon brush wear. Replace
carbon brushes when worn to a length of 10 mm
(0.38 in) or less.
Contact an Authorized Service Center for
machine repairs.
WARNING: Electrical 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 23). 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.
12
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.
FIG. 23
SPECIFIC GRAVITY
at 27_C (80_F)
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 (80_F),
the reading must be temperature corrected. Add or
subtract to the specific gravity reading 0.004, 4 points,
for each 6_C (43_F) above or below 27_C (80_F).
2. Always follow proper charging instructions
(See CHARGING BATTERIES).
3. Check the electrolyte level (A) in each battery cell
after charging batteries. The level should be
approximately 1 cm (0.38 in) from the bottom of the
fill- port (B) (Figure 24). Add distilled water if
needed. DO NOT OVERFILL.
B
A
BATTERY
CHARGE
100% CHARGED
75% CHARGED
50% CHARGED
25% CHARGED
DISCHARGED
FIG. 24
V- WD- 16B / V- WD- 61B (04- 10)