Kubota WSM J Series Workshop Manual page 165

J SERIES, WSM
F
B
Brush Wear
1. Measure the brush length with vernier caliper.
2. If the measurement is less than allowable limit, replace it.
3. Make sure that the brush moves smoothly.
4. If the brush is defective, replace it.
Factory spec.
Brush length
Allowable limit
Rectifier
1. Check the continuity across each diode of rectifier with an analog
ohmmeter. Conduct the test the (R×1) setting.
2. The rectifier is normal if the diode in the rectifier conducts in one
direction and dose not conduct in the reverse direction.
IMPORTANT

• Do not use a 500 V megger for measuring because it will
destroy the rectifier.
NOTE

• Do not use an auto digital multimeter. Because it's very hard
to check the continuity of rectifier by using it.
IC Regulator
1. Check the continuity the B terminal and the F terminal of IC
regulator with an analog ohmmeter. Conduct the test in the (R×1)
setting.
2. The IC regulator is normal if the IC regulator conducts in one
direction and dose not conducts in the reverse direction.
IMPORTANT

• Do not use a 500 V megger for measuring because it will
destroy the IC regulator.
• Do not use an auto digital mutimeter. Because it's very hard
to check the continuity of IC regulator by using it.
S-119
ENGINE
10.0 mm
0.394 in.
8.5 mm
0.354 in.
W1158060
W1158197
W1158310
KiSC issued 10, 2016 A