Toro groundsmaster 455-D - Four Wheel Drive Does Not Disengage; Four Wheel Drive Does Not Engage

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Four Wheel Drive Does Not Engage
Cause Correction
Front axle shift lever in “HI” (forward) position. Front axle shift lever must be in “LOW” (rear) position
f
or four wheel drive to engage.
Electrical problem. Check for faulty front axle HI/LOW switch, four wheel
drive sole
noid or wiring and repair if necessary.
Faulty four wheel drive solenoid valve. Inspect and clean solenoid valve and repair or
repla
ce if necessary.
Faulty roller clutch. Replace roller clutch.
Faulty rear axle hydraulic motor. Repair or replace motor.
Four Wheel Drive Does Not Disengage
Cause Correction
Electrical problem. Check for faulty front axle HI/LOW switch, or wiring
and r
epair if necessary.
Four wheel drive solenoid valve sticking. Inspect solenoid valve for damage or sticking in on
posi
tion and clean or replace valve if necessary.
Faulty roller clutch. Replace roller clutch.
Hydraulic System
Groundsmaster
®
455-D Page 4 - 15 Troubleshooting