Cutting Unit Operating Problems - Toro Greensmaster 3150 Service Manual

Cutting Unit Operating Problems

Problem
Cutting units run (but should not) when raised.
Cutting units do not run when lowered with the
Functional Control Lever in the MOW position.
Cutting units will not raise.
Cutting units will not lower.
Greensmaster 3150
Possible Causes
Joystick relay K3 is faulty or shorted.
Solenoid valve S1 is faulty.
Mow relay K4 is faulty or shorted.
Mow switch is shorted.
Wiring to run/mow/backlap circuits components (see
Wiring Schematics) is loose, corroded, or damaged.
Fuse block or fuse is faulty.
Solenoid valve S1 is faulty.
Mow switch and/or mow relay K4 is faulty or grounded.
Raise or lower switch and/or joystick relay K3 is faulty
or grounded.
Wiring to raise circuit components (see Wiring
Schematics) is loose, corroded, or damaged.
Fuse block or fuse is faulty.
Solenoid valve S3 and/or S2 is faulty.
Diode D3 is open.
Raise switch and/or raise relay K6 is faulty or
grounded.
Wiring to lower circuit components (see Wiring
Schematics) is loose, corroded, or damaged.
Fuse block or fuse is faulty.
Diode D2 is open.
Raise switch is faulty.
Lower switch is faulty.
Joystick relay K3 is faulty.
6 second delay timer is faulty.
Solenoid valve S2 or S4 is faulty.
Lower relay K5 is faulty.
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Electrical System