Toro Groundsmaster 455-D Service Manual page 159

General Run and Transport Problems (continued)
Condition
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4WD does not engage.
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Battery does not charge.
®
Groundsmaster 455-D
Possible Cause
Axle in HI range.
Axle HI/LOW switch or plunger
faulty.
Axle HI/LOW switch wiring loose,
corroded or damaged.
4WD solenoid valve faulty.
4WD solenoid wiring loose,
corroded or damaged.
Problem is not electrical.
Loose or broken wire(s).
Faulty alternator.
Dead battery.
Alternator warning lamp is faulty or
burnt out.
Alternator waring lamp wiring
loose, corroded or damaged.
Page 5 - 11
Correction
Axle must be in Low range for
4WD to engage.
Test HI/LOW switch. Check for
proper installation and operation
of plunger assembly. Replace
switch or repair plunger if faulty.
Repair wiring.
Test 4WD solenoid valve.
Replace if faulty.
Repair wiring.
See Troubleshooting section of
Chapter 4 - Hydraulic System.
Repair wiring.
Check alternator belt tension.
Test alternator and replace if
faulty.
Charge battery. Replace battery if
it will not hold a charge.
Replace lamp.
Repair wiring.
Troubleshooting