Toro Groundsmaster 4100-D Service Manual page 202

Cutting Deck Lift/Lower Problems (Continued)
Problem
LH wing cutting deck will not raise or lower, but the
front and RH wing cutting decks will raise and lower.
Electrical System
Possible Causes
LH deck lift switch or circuit wiring is faulty.
Lift control manifold solenoid coils S2, S3 or S4 or
circuit wiring is faulty.
A hydraulic problem exists (see Troubleshooting
section of Chapter 4 - Hydraulic System).
TEC--5001 controller is faulty.
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