24 Volt Alternator - Toro Groundsmaster 5900 Series Service Manual

24 Volt Alternator

Testing
Electrical System: Component Testing
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1. 24 Volt alternator
2. Positive (+) terminal
The Groundsmaster 5900/5910 uses two (2) batteries connected together in
series to support the 24 Volt cooling fan circuit. The 24 Volt system is charged
by an 105 Amp 24 Volt alternator driven by a multi−row V−belt. The 24 Volt
alternator is mounted to the machine frame with isolation washers to prevent the
alternator body from contacting the frame.
The 24 Volt alternator body must remain isolated from the machine
frame. Do not allow metal tools to come in contact with the 24 Volt
alternator body and other machine components while the 24 volt
system is active.
Be aware of and keep away from rotating parts during test. Do not
wear loose clothing while working near rotating parts as these may
become entangled and cause personal injury.
A battery−disconnect switch is included on the machine which should be
used to disconnect the 12 VDC and 24 VDC system components from the
electrical power supply to prevent component damage or unexpected component
operation when performing service.
1. Perform the electrical system quick checks (see
Checks (page 6–42)).
2. Use a battery load tester (carbon pile) and a multimeter (DC voltage setting)
to perform a Voltage Drop test on both the positive and negative circuits
between the alternator and the battery (see
Tech Tip − YouTube for additional information).
3
2
Figure 272
3. Negative (−) terminal (alternator body)
CAUTION
Page 6–130
Electrical System Quick
Voltage Drop Test | Delco Remy
Groundsmaster ®
16227SL Rev B
5900 & 5910