Yamaha UMAX, Service Manual

Page: 277 / 320

ELECTRICAL COMPONENTS (YUM2E)
8-72
Battery Charging
WARNING
Read and understand the owner’s manual
provided with your golf car’s battery charger
before charging batteries. Death or serious
personal injury can result from failing to
comply with the safety instructions in this
manual.
WARNING
Explosive hydrogen gas is produced while
batteries are being charged. Only charge
batteries in well ventilated areas (a minimum
of five air changes per hour is recommend-
ed). Death or serious personal injury can re-
sult from failing to comply with the safety
instructions in this manual.
To charge the batteries in your golf car, follow
the instructions contained in your battery char-
ger’s owner’s manual. The following is a sum-
mary of the charging steps.
1. Turn main switch to OFF position.
NOTICE
Always put the tow switch in the TOW posi-
tion before charging battery or damage to
the electrical system may result.
2. Lift up the seat and move the tow switch to
the TOW position.
3. With the charger properly connected and
grounded (see charger’s owner’s manual), in-
sert the DC output into the golf car recepta-
cle.
WARNING
Do not disconnect the DC output cord from
the battery receptacle when the charger is on
or an arc could occur that may cause an ex-
plosion. Death or serious personal injury can
result from failing to comply with the safety
instructions in this manual.
4. The charger will turn off automatically when
the batteries reach full charge.
5. After the charger has turned off, disconnect
the DC output plug from the golf car recepta-
cle by grasping the plug body and pulling the
plug straight out of the receptacle.
Specific Gravity Test
1. Do not add water at this time.
2. Apply a drop of electrolyte to the glass testing
area of the refractometer.
3. Take a reading and record it.
4. Check all cells in the battery.
5. Replace the vent caps and wipe off any elec-
trolyte that might have been spilled.
6. Adjust the readings to 26.7 °C (80 °F) as indi-
cated in the table 1 below:
Table 1
OFF ON
Temperature
Satisfactory Uncorrected
Refractometer Reading
°C °F
48.9 120 1.244
43.3 110 1.248
37.8 100 1.252
32.2 90 1.256
26.7 80 1.260
21.1 70 1.264
15.6 60 1.268
10 50 1.272
4.4 40 1.276
-1.1 30 1.280