Kubota SM-E4B Series Workshop Manual page 92

SM-E4B SERIES, WSM
Alternator on Unit Test
(Before testing)
• Before alternator on unit test, check the battery terminal
connections, circuit connection, fan belt tension, charging
indicator lamp, fuses on the circuit, and abnormal noise from the
alternator.
• Prepare full charged battery for the test.
NOTE
• Be careful not to touch the rotating engine parts while
engine is running.
Keep safety distance from the engine rotating parts.
1. Start the engine.
2. When the engine is operating measure the voltage between two
battery terminals. If the voltage is between 13.8 V and 14.8 V,
the alternator is operating normally.
3. If the results of alternator on unit test are not within the
specifications, disassemble the alternator and check the each
component part for finding out the failure. See the
"DISASSEMBLING AND ASSEMBLING" and "SERVICING" for
alternator.
Regulating voltage at no
Factory specification
load
Glow Plug Lead Terminal Voltage
1. Turn the key switch to the "GLOW (or PREHEAT)" position, and
measure the voltage with a circuit tester between the lead
terminal and the engine body.
2. If the voltage differs from the battery voltage, the wiring harness
or main switch is faulty.
Main switch key at GLOW
Voltage
(or PREHEAT)
Glow Plug Continuity
1. Remove the glow plug.
2. Measure the resistance with a circuit tester between the glow
plug terminal and the glow plug housing.
3. If the factory specification is not indicated, glow plug is faulty.
Resistance Factory specification
Engine Stop Solenoid Test (Energize to Stop Type)
1. Disconnect the 1P connector from the engine stop solenoid.
2. Remove the engine stop solenoid from the engine.
3. Connect the jumper leads from the battery positive terminal to
the 1P connector, and from the battery negative terminal to the
engine stop solenoid body.
4. If the solenoid plunger is not attracted, the engine stop solenoid
is faulty.
(1) Battery (12 V)
1-S28
ENGINE
13.8 to 14.8 V at
25 °C (77 °F)
9Y1210785ENS0022US0
Approx. battery voltage
9Y1210785ENS0023US0
Approx. 1.1 Ω
9Y1210785ENS0024US0
9Y1210785ENS0025US0
KiSC issued 01, 2013 A