Toro 4100-D Electrical System Quick Checks, Battery Test Open Circuit Test, Charging System Test

Electrical System Quick Checks

Battery Test (Open Circuit Test)

Use a multimeter to measure the voltage between the battery terminals.

Set multimeter to the DC volts setting. The battery should be at a temperature of 60oF to 100oF (16oC to 38oC). The ignition key should be off and all accessories turned off. Connect the positive (+) meter lead to the positive battery post and the negative (--) meter lead to the negative battery post.

NOTE: This test provides a relative condition of the bat- tery. Load testing of the battery will provide additional and more accurate information.

Voltage Measured		Battery Charge Level
12.68	V (or higher)	Fully charged (100%)
12.45	V	75% charged
12.24	V	50% charged
12.06	V	25% charged
11.89 V		0% charged

Charging System Test

This is a simple test used to determine if a charging sys- tem is functioning. It will tell you if the charging system has an output, but not its capacity.

Use a digital multimeter set to DC volts. Connect the positive (+) multimeter lead to the positive battery post and the negative (--) multimeter lead to the negative bat- tery post. Keep the test leads connected to the battery posts and record the battery voltage.

NOTE: Upon starting the engine, the battery voltage will drop and then should increase once the engine is running.

NOTE: Depending upon the condition of the battery charge and battery temperature, the battery voltage will increase at different rates as the battery charges.

Start the engine and run at high idle (2870 RPM). Allow the battery to charge for at least 3 minutes. Record the battery voltage.

After running the engine for at least 3 minutes, battery voltage should be at least 0.50 volt higher than initial bat- tery voltage.

An example of a charging system that is functioning:

At least 0.50 volt over initial battery voltage.

Initial Battery Voltage	= 12.30 v
Battery Voltage after 3 Minute Charge	= 12.85 v
Difference	= +0.55 v

Check Operation of Interlock Switches

CAUTION

Do not disconnect safety switches. They are for the operator’s protection. Check the operation of the interlock switches daily for proper operation. Replace any malfunctioning switches before op- erating the machine.

Interlock switch operation is described in the Operator’s Manual. Testing of interlock switches and relays is in- cluded in the Component Testing section of this Chap- ter.

Electrical System Page 5 -- 8 Groundsmaster 4100--D