Mitsubishi 6M60-TL - Inspection: Alternator; Adjustment Voltage of Regulator (Bench Test)

54
54-29
Inspection procedure
Inspection: Alternator
(1) Alternator output current (bench test)
• Connect the alternator as illustrated.
CAUTION
• Wires with sufficient thickness should be used for wiring
and each connection should be securely fastened.
B: Terminal B
E: Terminal E
L: Terminal L
R: Terminal R
• Increase load resistance to the maximum (condition under which
the load current hardly flows).
• Turn switch A and B ON.
• Run alternator at 5000 rpm for 30 minutes by adjusting load re-
sistance so that electric current can conform to the following
standard.
Alternator nominal current
• Measure the current at each specified revolution of alternator.
• If the measured value deviates from the standard value, disas-
semble and check alternator.
(2) Adjustment voltage of regulator (bench test)
• Connect the alternator as illustrated.
B: Terminal B
E: Terminal E
L: Terminal L
R: Terminal R
• Turn switch ON.
• Run alternator at low speeds.
• Increase the speed of alternator to 5000 rpm and measure the
voltage (adjustment voltage) at this speed. At the same time,
make sure that the current is 5 amperes or less at 5000 rpm.
• If the measured value deviates from the standard value, do as
follows:
• If higher than the standard value: Replace the regulator.
• If lower than the standard value: Inspect the alternator related
parts before replacing the regulator.
Current
Approx. 45 A