608 ELECTRICAL 8.4 ALTERNATOR CHECKSONENGINE a. Battery charge indicator lamp does not glow: 1. Start the engine and check if lamp is faulty.Check the continuity of respective fuse.Replace blown fuse. 2. Start the engine and connect an ammeter of suitable range in series with the positive terminal of the battery.Raise the engine speed to near about 2000 rpm and switch ‘ON’ the Headlamp, Parking lamp, Heater, Tail lamp and other electrical loads. Rated current output should be reached without voltage dropping to 13 volts. If not, remove Alternator for thorough checks.Reduce the engine speed to near about 1500 rpm, and ensure that the ammeter reading falls around 3 to 5 Amps. Check the voltmeter reading. It should read between 13.8 to 14.2 volts. If not, remove the alternator and check the voltage regulator. b. Warning lamp continues to glow The alternator belt tension values are 120~130 Hz on lower span for new belt & 100~110 Hz for retensioning the used belt. Start the engine and check belt tension (indicated by arrow) found slack, adjust the belt deflection to the specified value. Repeat test. TORQUE VALUE TABLE APPLICATION TORQUE VALUE (Nm) Alternator to alternator bracket, bolt M8x75l 22 ± 2 Alternator to ‘a’ mounting arm, bolt M8 x 28l 22 ± 2 Pulley Hexagon Nut 40 - 47 Rectifier & regulator 2.1 -2.9 Hexagon through bolt 5 - 5.7 A point screw 1.5 - 2 REMOVAL & REFITMENT OFALTERNATOR REMOVAL 1. Disconnect battery negative terminal. CAUTION: Ensure that both terminals areAWAY from the each other. 2. Disconnect the electrical connector.
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