Electrical System Quick Checks; Testing The Charging System - Toro Groundmaster Series Service Manual

Electrical System Quick Checks

Testing the Charging System

Groundsmaster ® 3200, 3300 and 3310
19240SL Rev A
The Groundsmaster 3200/3300/3310 machines use a single 12 Volt maintenance
free battery mounted on the left side of the machine behind the fuel tank. The
battery is charged by either a 40 Amp (models 31900/31901) or 55 Amp (Models
31902/31903/31907/31909) 12 volt alternator mounted to the engine, which is
driven by a single row V-belt.
Use the TDM display/controller screen to monitor the 12 Volt electrical system. It
will tell you if the charging system has an output, but not its capacity.
1. Check to make sure each alternator drive belt is not loose, worn or damaged.
2. Turn the key switch to the ON position and set the TDM display/controller
screen to view the voltmeter (battery icon).
3. Record the initial system voltage.
4. Start the engine and warm the engine to normal operating temperature.
5. Set the engine RPM to 2300 RPM.
6. Turn on all additional system loads (e.g. lights, blower).
7. The system voltage should be at least 0.5 volt higher then the initial voltage
recorded in step 3.
8. If the charging system performance is less than desired, refer to the Yanmar
Service Manual or Troubleshooting Manual for additional information.
Page 6–7 Electrical System: Electrical System Quick Checks