Electrical System Quick Checks; Testing The Charging System - Toro Sand Pro 3040 Service Manual

Electrical System Quick Checks

Testing the Charging System

Electrical System: Electrical System Quick Checks
The Sand Pro 3040/5040 machines use a single 12 Volt maintenance free
battery mounted behind the right side rear wheel. The battery is charged by a 15
Amp 12 volt alternator with separate voltage regulator supplied by the engine
manufacturer.
The following is a simple test used to determine if the charging system is
functioning. It will tell you if the charging system has an output, but not its
capacity.
1. Use a digital multimeter set to DC volts and connect the positive (+)
multimeter lead to the positive battery post and the negative (–) multimeter
lead to the negative battery post.
2. Record the battery voltage. The battery voltage must be greater than 5 VDC
for the alternator system to have any output. If the battery voltage is less than
5 VDC, charge the battery before performing this charging system test.
3. Start the engine and run at high idle (3400 RPM). Allow the battery to charge
for at least 3 minutes. Record the battery voltage.
Note: Upon starting the engine, the battery voltage will drop and then should
increase once the engine is running.
Depending upon the condition of the battery charge and battery temperature,
the charging system voltage will increase at different rates as the battery
charges.
4. After running the engine for at least 3 minutes, the battery voltage should be
at least 0.50 volt higher than the initial battery voltage.
Page 6–4 Sand Pro ® 3040 and 5040
20251SL Rev A