Bolens 134-585A - Manual (Page 11)

Maintenance
The ammeter shows you the rate
at which your batteries are charg­
ing. Maximum charging rate
is approximately 7 to 8 amps. The
charging rate will drop to 3 amps
during the latter part of charging.
Figure 16
Charging Hints
1 Be sure the outlet used to
charge the battery is live and
does not shut off when you turn
off the lights.
2 Only use the charger built into
the mower to charge the bat­
teries. Do not use any other
charger.
3 Do not use the battery in the
mower to “jump" any other
vehicle.
Battery Maintenance
Follow the instructions in the above
paragraph covering the charging
of the batteries. To charge a set
of batteries to 100% of capacity
will take a maximum of 12 hours.
Reading your ammeter during the
charging will give you an indication
of the state of charge of your bat­
teries. If the ammeter reading is
over 6 Amps, you have less than
80% of capacity.
A hydrometer can be used to
check the state of charge of the
batteries. Always read a hydrometer
at eye level to obtain a true reading.
Keep the float vertical. A hy­
drometer is designed to give the
correct reading at 80°F. This is
the electrolyte temperatuer, not the
air temperature. Draw enough elec­
trolyte into the hydrometer so the
float does not touch the bottom of
the tube. A correction chart is
necessary to obtain a true reading.
(See figure 17.)
Temperature Correction Chart
°F. Correction
120 -F.016
115 + .014
110 + .012
105 + .010
100 + .008
95 + .006
90 +.004
85 1 +.002
80 0
75 -.002
70 -.004
65 -.006
60 -.008
55 -.010
50 -.012
45 -.014
40 -.016
35 . -.018
30 -.020
25 -.022
20 ■ -.024
15 -.026
10 -.028
Figure 18
1.260 SpGr 1.280 SpGr 100% Chg
1.230 SpGr 1.250 SpGr 75% Chg
1.200 SpGr 1.220 SpGr 50% Chg
1.170 SpGr 1.190 SpGr 25% Chg
1.140 SpGr 1.160 SpGr Very little
useful capacity
1.110 SpGr 1.130 SpGr Discharged
Figure 19
Examples of Reading
Specific Gravity
Hydro. Read. (fig. 17) 1.230 SpGr
Electrolyte Temp. 30° F.
Temp, Correction (fig. 18) -.020
Corrected SpGr* 1.210 SpGr
17) Hydro. Read, (fig
Electrolye Temp.
Temp. Correction (fig
Corrected SpGr* 1.230 SpGr
100° F.
18) -F.008
1.238 SpGr
Figure 17
*Compare to figure 19.
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