Toro Groundsmaster 4000-D Service Manual page 212

Cutting Deck Operating Problems (Continued)
Problem
Cutting decks run, but should not, when lowered with
PTO switch in the OFF (disengage) position.
Cutting deck(s) do not operate.
Electrical System
Possible Causes
The PTO switch or circuit wiring is faulty.
The TEC controller is faulty.
The operator is lifting off the seat switch.
The cutting decks are not fully lowered.
Traction circuit is not in LOW speed (mow) mode.
High temperature of engine coolant or hydraulic oil has
disabled the cutting decks.
Fuse is faulty preventing PTO manifold solenoids from
being energized.
The seat switch or circuit wiring is faulty.
The PTO switch or circuit wiring is faulty.
The deck position switch or circuit wiring is faulty.
The HI/LOW speed switch or circuit wiring is faulty.
Hydraulic valve solenoid(s) or circuit wiring to the
affected deck(s) is faulty.
A hydraulic problem in the mow circuit exists (see
Troubleshooting section of Chapter 4 -- Hydraulic
System).
The TEC controller is faulty.
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