Charging System; Ac Dynamo; Regulator - Kubota B2301 Workshop Manual

B2301, B2601, WSM

[5] CHARGING SYSTEM

(1) AC Dynamo

(2) Regulator

Dynamo No-load Voltage
1. Disconnect the lead wires from the dynamo.
2. Start the engine, and check the generating voltage of the
dynamo.
Factory specification Voltage
Continuity across Regulator's Terminals
1. Remove the regulator (1).
2. Check with a tester whether the regulator (1) is in optimum
condition or not as table below.
3. If the continuity is not measured as shown in the table below, the
contacts of the regulators are damaged.
NOTE
• Use analog tester for measuring the continuity. Do not use
insulation resistance tester.
• On the check table below, "ON" means that the pointer of
tester is swung and "OFF" means it is not swung. The value
kΩ is reference value by measuring 1 kΩ range. And this
value is changed by range, measurement tools and so on.
• When measuring, remove wire harness and measure the
value of regulator itself.
Tester (−) terminal
1
–
1
OFF
2
OFF
3
Cord
colors
OFF
4
ON
5
(7.1 kΩ)
OFF
6
(1) Regulator
8-S17
ELECTRICAL SYSTEM
14 to 15 V (at engine idling
speed)
9Y1211156ELS0025US0
Tester (+) terminal
Cord colors
2 3 4
OFF OFF OFF OFF
– OFF OFF OFF
OFF – OFF OFF
OFF OFF – OFF
ON ON
OFF
(7.1 kΩ) (7.1 kΩ)
OFF OFF OFF OFF
1 : Sky Blue
2 : Black
3 : Sky Blue
4 : Green
5 : Yellow
6 : Red
9Y1211156ELS0026US0
KiSC issued 11, 2014 A
5 6
ON
(7.1 kΩ)
OFF
ON
(7.1 kΩ)
OFF
ON
–
(7.1 kΩ)
–