ELECTRICAL COMPONENTS (YUM2E)
8-73
7. Compare the readings.
8. Check the state of charge using the table 2.
Table 2
9. If any specific gravity reading still registers
lower than the factory specification of 1.277 ±
0.007, then one or more of the following con-
ditions may exist:
a. The battery is old and approaching the
end of its life.
b. The battery was left in a state of discharge
too long.
c. Electrolyte was lost due to spillage or
overflow.
d. A weak or bad cell is developing.
e. Battery was watered excessively before
testing.
Batteries identified with any one of the condi-
tions listed in items 9a through 9e should be tak-
en to a specialist for further evaluation or retired
from service.
Open-Circuit Voltage Test
For accurate voltage readings, batteries must
remain idle (no charging, no discharging) for at
least six hours, preferably 24 hours.
1. Disconnect all loads from the batteries.
2. Measure the voltage using a DC voltmeter.
3. Check the state of charge with the table in
4. Charge the battery if it registers 0% to 70%
charged.
5. After charging, if battery registers below the
table in “Specific Gravity Test” values, the
following conditions may exist:
a. The battery was left in a state of discharge
too long.
b. The battery has a bad cell.
Batteries in these conditions should be taken to
a specialist for further evaluation or retired from
service.
Discharge Load Test
WARNING
Batteries generate explosive hydrogen gas.
Always follow these precautionary mea-
sures:
• Charge batteries in a well-ventilated area.
• Keep batteries away from sparks or open
flames (e.g., welding equipment, lit ciga-
rettes, etc.).
• Do not smoke when charging or handling
batteries.
The purpose of the discharge load test is to de-
termine how many minutes it will take to bring
the total voltage of a fully charged 48 V battery
pack to 42 V. This test represents the maximum
work or runtime capability of a 48 V battery pack
at 26.7 °C (80 °F) to fall to 42 V.
Sixty minutes should deliver 36 holes of golf for
most courses. A shorter time period will indicate
that one or more of the batteries needs service
or replacement.
When you are load testing, you will need a load
tester and a high-quality digital voltmeter capa-
ble of reading at least 55 V DC. Yamaha recom-
mends using the Lester 17770 Battery
Discharge Unit.
State of Charge as related to specific gravity
and operating circuit voltage
Percentage of
Charge
Specific Gravity
Corrected to
26.7 °C (80 °F)
Open-Circuit
Voltage 48 V
100
1.277
50.93
90
1.258
50.47
80
1.238
49.99
70
1.217
49.49
60
1.195
48.96
50
1.172
48.41
40
1.148
47.83
30
1.124
47.26
20
1.098
46.63
10
1.073
46.03
DISCHARGE TESTER 36/48V
LES-DISCH-AR-GE
Summary of Contents for UMAX
Page 1: ...SERVICE MANUAL UTILITY VEHICLE J0F F8197 E1 YUM1A YUM2A YUM2E LIT 19616 A0 37...
Page 2: ......
Page 6: ......
Page 8: ......
Page 25: ...GENERAL SPECIFICATIONS 2 2 1174 kg 2589 lb YUM2E Hill claiming ability 20 YUM1A 15 YUM2A YUM2E...
Page 33: ...ELECTRICAL SPECIFICATIONS YUM1A YUM2A 2 10 USB fuse 5 A...
Page 43: ...TIGHTENING TORQUES 2 20...
Page 46: ...CABLE ROUTING 2 23 YUM1A Front and rear A B C 1 1 1 1 2 3 4 3 4 1 2 3 4 5 6...
Page 48: ...CABLE ROUTING 2 25 YUM1A Left side A B D C 1 2 3 4 4 4 4 5 6 7 8 9...
Page 50: ...CABLE ROUTING 2 27 YUM1A Brake and throttle cables A B 1 3 2 3 1 2 2 4 5...
Page 52: ...CABLE ROUTING 2 29 YUM1A Shift cables 1 2 3 1 2 4 1 2...
Page 56: ...CABLE ROUTING 2 33 YUM2A Front and rear A B C D 1 1 1 1 1 2 2 3 3 4 4 3 4 5 6 7...
Page 58: ...CABLE ROUTING 2 35 YUM2A Left side A B C D 1 2 3 4 4 4 4 6 7 8 9 10 5...
Page 60: ...CABLE ROUTING 2 37 YUM2A Brake throttle and shift cables A A B C D 1 1 2 3 3 4 5 4 5 6 6 7 8 9...
Page 62: ...CABLE ROUTING 2 39 YUM2E Frame top view A A B 1 2 3 4 5 6 7 C D E E 6 6 6 8 9 10 11 12...
Page 64: ...CABLE ROUTING 2 41 YUM2E Front and rear 1 1 2 3 4 3 A...
Page 66: ...CABLE ROUTING 2 43 YUM2E Left side B 2 1 3 4 5 6 7 8 9 10 11 A 9...
Page 68: ...CABLE ROUTING 2 45 YUM2E Brake cable A A B C 1 2 4 3...
Page 70: ...CABLE ROUTING 2 47...
Page 73: ......
Page 96: ...4 YEAR CHECKS 3 23...
Page 99: ......
Page 134: ...FRONT SUSPENSION COMPONENTS 4 35 4 3 1 2 5 a...
Page 138: ...REAR SUSPENSION COMPONENTS 4 39...
Page 174: ...CRANKSHAFT AND PISTON 5 35...
Page 196: ...TRANSMISSION YUM1A YUM2A 7 13 Refer to CHECKING THE SHIFT LEVER YUM1A YUM2A on page 3 8...
Page 202: ...TRACTION MOTOR YUM2E 7 19...
Page 205: ......
Page 217: ...CHARGING SYSTEM YUM1A YUM2A 8 12...
Page 223: ...LIGHTING SYSTEM YUM1A YUM2A 8 18...
Page 227: ...LIGHTING SYSTEM YUM2E 8 22...
Page 233: ...SIGNALING SYSTEM YUM1A YUM2A 8 28...
Page 243: ...FUEL INJECTION SYSTEM YUM1A YUM2A 8 38...
Page 247: ...FUEL PUMP SYSTEM YUM1A YUM2A 8 42...
Page 284: ...ELECTRICAL COMPONENTS YUM2E 8 79...
Page 313: ...PC GENIUS GOLF CAR PROGRAMMING SYSTEM YUM2E 9 28...
Page 315: ......
Page 316: ......
