Charging System; Alternator - Kubota WSM B2050 Workshop Manual

B2050, B2350, B2650, B3150, WSM

[5] CHARGING SYSTEM

(1) Alternator

Connector Voltage
1. Turn the main switch OFF. Measure the voltage between the B
terminal (1) and the chassis.
2. Turn the main switch ON. Measure the voltage between the IG
terminal (3) and the chassis.
Voltage
B terminal – Chassis
(Main switch at OFF)
Voltage
B terminal – Chassis
(Main switch at ON)
(1) B Terminal
(2) Alternator
No-Load Test
1. Connect the 2P connector (6) to previous positions of the
alternator after turning the main switch OFF.
2. Connect the jumper lead (3) between IG terminal (4) and B
terminal (2).
3. Start the engine and then set at idling speed.
4. Disconnect the negative cable from the battery.
5. Measure the voltage between the B terminal (2) and the
chassis.
6. If the measurement is less than the factory specifications,
disassemble the alternator and check the IC regulator.
Voltage Factory specification
(Reference)
• Once the engine has started, the alternator temperature rises
quickly up to an ambient temperature of 70 to 90 °C (158 to
194 °F). As the temperature goes higher than 50 °C (122 °F),
the alternator voltage slowly drops; at higher than 100 °C
(212 °F), it drops by about 1 V.
(1) Voltmeter
(2) B Terminal
(3) Jumper Lead
9-S21
ELECTRICAL SYSTEM
Approx. battery voltage
Approx. battery voltage
(3) IG Terminal
(4) L Terminal
9Y1210982ELS0030US0
More than 14 V
(4) IG Terminal
(5) L Terminal
(6) 2P Connector
9Y1210982ELS0031US0
KiSC issued 03, 2014 A