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Groundsmaster 5900/5910 Page 5 -- 37 Electrical System
PTO Switch
The PTO switch is located on the console arm (Fig. 65).
The PTO switch is pulled up to engage the PTO (cutting
decks or implement).
The TEC--5002 controller monitors the position of the
PTO switch (up or down). Using inputs from the PTO
switch and other switches in the interlock system, the
TEC controller controls the energizing of the hydraulic
solenoid valves used to drive the cutting deck motors.
IMPORTANT: During machine operation, if the PTO
shuts down andthe Info Center indicates excessive
engine coolant temperature, avoid shutting off the
engine. Under this condition, the operator should
disengage the PTO, slowly drive to a safe flat area,
lower the engine speed to the SLOW position and
engage the parking brake. The engine should be al-
lowed to idle for several minutes while it cools to a
safe level. Then, the cooling system should be
checked before returning the machine to service.
Testing
1. Before disconnecting the PTO switch for testing, the
switch and its circuit wiring should be tested as a TEC
controller input with the Info Center Diagnostic Display
(see Info Center Display in this section).
2. If the Diagnostic Display verifies that the PTO switch
and circuit wiring are functioning correctly, no further
switch testing is necessary.
3. If the Diagnostic D isplay determines that the PTO
switch and circuit wiring are not functioning correctly,
test PTO switch.
4. Make sure ignition switch is OFF. Remove key from
ignition switch.
5. Disassemble console arm to gain access to PTO
switch (see Console Arm Disassembly in the Service
and Repairs section of Chapter 7 -- Chassis).
6. The switch terminals are marked as shown in Figure
66. The circuit logic of the PTO switch is shown in the
chart to the right. With theuseofa multimeter (ohms set-
ting), the switch functions may be tested to determine
whether continuity exists between the various terminals
foreachposition.Verifycontinuity betweenswitchtermi-
nals. Replace switch if testing identifies a faulty switch.
7. Connect the wire harness connector to the switch af-
ter testing.
8. If switch tests correctly and circuit problem still ex-
ists, check wire harness (see Wiring Schematic and Cir-
cuit Drawings in Chapter 10 -- Foldout Drawings).
9. Assemble console arm cover (see Console Arm As-
sembly in the Service and Repairs section of Chapter 7
-- Chassis).
1. Console arm 2. PTO switch
Figure 65
1
2
1. COM B terminal
2. NO B terminal
3. NC B terminal
4. COM C terminal
5. NO C terminal
6. NC C terminal
Figure 66
2
3
1
6
4
5
SWITCH
POSITION
CLOSED
CIRCUITS
OPEN
CIRCUITS
OFF (DOWN) COM B + NC B
COM C + NC C
COM B + NO B
COM C + NO C
ON (UP) COM B + NO B
COM C + NO C
COM B + NC B
COM C + NC C
Electrical
System