4Wd Solenoid Coil Replacement; Axle Hi/Low Switch Replacment - Toro Groundsmaster 455-D Service Manual

4WD Solenoid Coil Replacement

1. Park machine on a level surface, engage parking
brake, lower the cutting units and turn engine OFF.
2. Disconnect solenoid electrical connector.
3. Remove coil nut.
4. Remove coil assembly.
5. Install new coil assembly and secure with coil nut.
Apply "Locktite 242" or equivalent to threads on end of
stem tube before installing nut. Tighten nut to a torque
of 15 in-lb. Over-tightening may damage coil nut or
cause solenoid valve to malfunction.
6. Connect electrical connector.
Axle Hi/Low Switch Replacement
1. Park machine on a level surface, engage parking
brake, lower the cutting units and turn engine OFF.
2. Disconnect Hi/Low switch electrical connector.
3. Remove Hi/Low switch with o-ring, spring & ball
guide, spring, plunger and switch pin guide.
4. Before installing new switch, clean spring & ball
guide, spring and plunger with cleaning solvent. Re ­
place any worn or damaged parts. After parts are dry,
coat spring & ball guide, spring, plunger and inside of
switch pin guide with No. 2 multi-purpose grease.
5. Install a new o-ring, then install the new switch.
6. Connect electrical connector.
NOTE: For proper operation, the switch must be
screwed all the way in. Improper lubrication or debris in
the switch could cause the switch to not open and close
properly. Shift linkage that is out of adjustment can also
cause improper switch operation.
Repairs
6
1. Hi/Low Switch
2. O-ring
3. Spring & ball guide
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1
Figure 36
1. 4WD solenoid
2
5
4
3 1
Figure 37
4. Spring
5. Plunger
6. Switch pin guide
Groundsmaster
®
455-D