11. ELECTRIC WIRING 11.2 Precaution on Electric Wiring 11.2.1 Alternator In the cases listed below the warranty shall not be deemed to apply. Please be sure to read these conditions carefully when planning to use it with other equipment. Also be certain to give appropriate guidance on usage to the user. (1) When the battery cable can be connected backwards The alternator diode will be damaged and recharging made impossible if the plus and minus ends of the battery cable are confused. The stator coil will also be burned as a result. To prevent this, supply the user with a cable of such a length or structure that the plus and minus ends cannot be confused.
Also warn the user not to connect the cable backwards. (2) When charging output voltage is used for control purposes The engine speed at starting is not proportional to the output voltage of the alternator, so this output voltage must not be used for any control systems. It is especially wrong to use it for the control signal of the safety relay for cutting the starting motor because this will damage the starting motor and cause engine starting failure. (3) When the L line is used for control purposes Consult with Komatsu first before connecting any load other than the charge lamp to the L line.
Damage to the alternator and related equipment will not be warranted without such prior consultation. (4) Non-use of the Komatsu wiring diagram Use without prior consultation of any wiring diagram other than that provided by Komatsu removes any breakdown of any electrical equipment from the warranty. (5) Regarding lamp control Once the charge lamp goes out after the start of charging, it does not come on again even if the engine speed falls and charging is insufficient. The lamp will not light again if the charging circuit is normal. The lamp only comes on during operation if the alternator itself is broken or the drive V-belt breaks.
However, when an LED is used for the charge lamp, the LED will shine faintly even during normal operation. This is due to the control system for the alternator lamp and is not an abnormality. (6) Use of a non-specified V-belt Use of a non-specified V-belt will cause inadequate charging and shorten the life of the belt. Use a belt of the specified type. (7) Direct high pressure washing is prohibited Water will enter the brush if the alternator is washed directly at high pressure, causing inadequate charging. Warn users not to use direct, high-pressure washing.
(8) Adhesion of agricultural and other chemicals (direct contact or airborne) Adhesion of agricultural and other chemicals, especially those with high sulfur content, to the IC regulator corrodes the conductor on the substrate, leading to over-charging (battery boiling) and charging malfunc- tions. Consult with Komatsu prior to using the engine in such an environment. Use without prior consultation removes any breakdown from the warranty. 11-4 82E-5 – 98E-5 SERIES