Cutting Deck Operating Problems - Toro Groundsmaster 4500-D Service Manual

Cutting Deck Operating Problems

NOTE: Check InfoCenter Display for possible operator
advisories or faults whenever diagnosing machine elec-
trical problems.
Problem
Cutting decks run, but should not, when raised. Decks
shut off with PTO switch.
Cutting decks run, but should not, when raised. Decks
do not shut off with the PTO switch.
Cutting decks run, but should not, when lowered with
PTO switch in the OFF (disengage) position.
Cutting deck(s) do not operate and Operator Advisory
is displayed on InfoCenter (see Operator Advisory list
in this section).
Cutting deck(s) do not operate and no Operator
Advisory is displayed on InfoCenter.
Electrical System
Possible Causes
The cutting deck position switch or circuit wiring is
faulty.
Wire harness connections are incorrectly connected to
hydraulic solenoid valve coils on hydraulic deck control
manifold.
A hydraulic problem in the mow circuit exists (see
Troubleshooting Section of Chapter 4 -- Hydraulic
System).
TEC controller is faulty.
The deck position switch or circuit wiring AND PTO
switch or circuit wiring are faulty.
A hydraulic problem in the mow circuit exists (see
Troubleshooting Section of Chapter 4 -- Hydraulic
System).
The PTO switch or circuit wiring is faulty.
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 (fuse B--1 or B--2).
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).
TEC controller is faulty.
Page 5 - - 20 Groundsmaster 4500--D/4700--D