Checking No-Load Regulating Voltage; Regulator - Checking Test Terminals Ig-F - Kubota D1102-B Workshop Manual

C022F042
(1) Voltage regulator
(2) I.G. (Black/white)
(3) F (White/green)
(4) Voltage relay
0

Checking No-Load Regulating Voltage

1) ) Con nect a vol tmeter across the alternator's B termi nal
and the ground.
2) Start the engi ne, speed u p to a rate (a pprox. 1300 min-
where the alternator is self-excited, a nd d iscon nect
(rpm))
the battery's negative cable.
3) Read the vol tmeter while gradual l y accele rati n g the engine.
( Note for checking)
• Be sure to grad ually accelerate the engine whi le reading
the voltmeter. Never obtain the specified engine speed by
decelerati ng the engine from maxi m um speed.
Regulator
(1) Checking Test Terminals IG-F
1) Con nect a ci rcuit tester across the regul ator's coupler I G
(bl ack /wh ite) and F (wh i te/green ) termi nal and measure
the resistance.
2) I f the readi ng exceeds zero ohms, the vol tage regul ator's
l ow-speed side contact is faul ty.
IG N F
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-
C022F046
E L B
(2) Checking Test Terminals IG-F
1) Con nect a ci rcui t tester across I G (bl ack/whi te) and F
(wh i te/green ) and read the
vol tage regul ator with a finger.
2) I f the readin g is i nf in ity, the control resistor is broken .
(1) I.G. (black/white)
(2) F (white/green)
78
1
tester wh i l e pressi ng the
KiSC issued 09, 2007 A