User manual MITSUBISHI ENGINE ELECTRICAL SPECIFICATIONS

[. . . ] 16-1 ENGINE ELECTRICAL CONTENTS CHARGING SYSTEM . 4 Alternator Output Line Voltage Drop Test . 26 Ignition Coil (With Built-in Power Transistor) Check . 31 16-2 ENGINE ELECTRICAL - Charging System CHARGING SYSTEM GENERAL INFORMATION The charging system uses the alternator output to keep the battery charged at a constant level under various electrical loads. Voltage OPERATION Rotation of the excited field coil generates AC voltage in the stator. [. . . ] (2) Use care that no undue force is exerted to the lead wires of the diodes. 16-14 ENGINE ELECTRICAL - Charging System REASSEMBLY SERVICE POINTS Wire "AA REGULATOR ASSEMBLY INSTALLATION After installing the regulator assembly, insert a wire into the hole provided on the rear bracket while pressing in the brush to fix the brush. NOTE The brush is fixed when a wire is inserted, making rotor installation easier. Rear bracket Brush Wire Wire "BA ROTOR INSTALLATION After installing the rotor, remove the wire used to fix the brush. INSPECTION 16100170216 ROTOR CHECK 1. Check the continuity between the rotor coil slip rings, and replace the rotor if the resistance value is not at the standard value. Check the continuity between the slip ring and core, and if there is continuity, replace the rotor. ENGINE ELECTRICAL - Charging System 16-15 STATOR CHECK 1. Check the continuity between the coil leads, and if there is continuity, replace the stator. 2. Check the continuity between the coil and core, and if there is continuity, replace the stator. RECTIFIER CHECK 1. Inspect the (+) heat sink by checking the continuity between the (+) heat sink and stator coil lead wire connection terminal using a tester probe. If there is a continuity at both, the diode is short circuited, so replace the rectifier. 2. Inspect the ( - ) heat sink by checking the continuity between the ( - ) heat sink and stator coil lead wire connection terminal using a tester probe. If there is a continuity at both, the diode is short circuited, so replace the rectifier. 3. Check the diode trio by connecting an ohmmeter to both ends of each diode and check the continuity of the three diodes. If there is a continuity at both ends, or if there is no continuity, the diode is damaged so replace the rectifier. 16-16 ENGINE ELECTRICAL - Charging System BRUSH CHECK 1. Measure the length of the brush protrusion shown in the illustration, and replace the brush if the measured value is below the limit value. Protrusion length Limit: 2 mm or less Soldered 2. The brush can be removed if the solder of the brush lead wire is removed. When installing a new brush, insert the brush into the holder as shown in the illustration, and then solder the lead wires. ENGINE ELECTRICAL - Starting System 16-17 STARTING SYSTEM GENERAL INFORMATION If the ignition switch is turned to the "START" position, current flows in the pull-in and holding coils provided inside magnetic switch, attracting the plunger. When the plunger is attracted, the lever connected to the plunger is actuated to engage the starter clutch. On the other hand, attracting the plunger will turn on the magnetic switch, allowing the B terminal SYSTEM DIAGRAM Pull-in coil Holding coil Plunger Lever Over-running clutch Pinion shaft Ignition switch Armature Battery and M terminal to conduct. Thus, current flows to engage the starter motor. When the ignition switch is returned to the "ON" position after starting the engine, the starter clutch is disengaged from the ring gear. An overrunning clutch is provided between the pinion and the armature shaft, to prevent damage to the starter. Brush Yoke STARTER MOTOR SPECIFICATIONS Items Type Rated output kW/V No. of pinion teeth 4G9 Reduction drive with planetary gear 1. 2/12 8 4G6 Reduction drive with planetary gear 1. 4/12 8 SERVICE SPECIFICATIONS Items Pinion gap mm Commutator outer diameter mm Commutator runout mm Commutator undercut mm Standard value 0. 5 - 2. 0 29. 4 0. 05 0. 5 Limit 28. 8 0. 1 0. 2 16-18 <4G9> S B M Switch ENGINE ELECTRICAL - Starting System STARTER MOTOR INSPECTION Battery Wire PINION GAP ADJUSTMENT 1. Disconnect field coil wire from M-terminal of magnetic switch. [. . . ] Caution This test must be performed quickly (in less than 10 seconds) to prevent coil from burning and power transistor from breakage. Voltage: 1. 5V When current is flowing When current is not flowing Terminal No. 1 2 3 + SECONDARY COIL CHECK NOTE It is impossible to check the secondary coil through the continuity check as a diode is integrated in the secondary coil circuit of this ignition coil. So, check the secondary coil in the following procedure. Remove the ignition coil and install a new spark plug to the ignition coil. [. . . ]