Kohler RH255 [31/56] Electrical system

31

Electrical System

18 690 06 Rev. A KohlerEngines.com

3/10 Amp Battery Charging Systems

NOTE: Zero ohmmeters on each scale to ensure accurate readings. Voltage tests should be made with engine

running at 3600 RPM - no load. Battery must be fully charged. Check specifi c gravity of battery. If low,

recharge or replace battery as necessary.

To test charging system for no charge to battery:

1. Separate bullet connector in white lead from rectifi er-

regulator. Connect an ammeter from female terminal

load of 5 amps (turn on lights if 60 watts or more, or

place a 2.5 ohm, 100 watt resistor across battery

terminals) on battery to reduce voltage. Observe

ammeter.

Condition Conclusion

Voltage is 14.0-15.0 volts

and charge rate increases

when load is applied.

Charging system is OK

and battery was fully

charged.

Voltage is less than 14.0

volts or charge rate does

Test stator (steps 2 and

3).

Condition Conclusion

Voltage is 20.0 volts or

more.

Stator is OK. Rectifi er-

regulator is faulty; replace.

Voltage is less than 20.0

volts.

Stator is probably faulty

and should be replaced.

Test stator further using

an ohmmeter (step 3).

3. With engine stopped, measure resistance from each

stator lead to ground using an ohmmeter.

Condition Conclusion

1. Separate bullet connector in white lead from rectifi er-

regulator. Connect an ammeter from female terminal

to positive (+) terminal of battery. Connect a DC

voltmeter from female terminal to negative (-)

terminal of battery. Leave other rectifi er-regulator

leads connected in normal manner. Run engine at

3600 RPM and read voltage on voltmeter.

If voltage is 14.0 volts or more, place a minimum

load of 5 amps (turn on lights if 60 watts or more, or

place a 2.5 ohm, 100 watt resistor across battery