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).
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).
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.
9. Assemble console arm cover (see Console Arm As-
sembly in the Service and Repairs section of Chapter 7
-- Chassis).
2
IMPORTANT: During machine operation, if the PTO
shuts down and the 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.
1
Testing
1.
Before disconnecting the PTO switch for testing, the
Figure 65
2. PTO switch
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).
1.
Console arm
2.
and circuit wiring are functioning correctly, no further
If the Diagnostic Display verifies that the PTO switch
4
1
switch testing is necessary.
3.
If the Diagnostic Display determines that the PTO
5
2
switch and circuit wiring are not functioning correctly,
test PTO switch.
4.
ignition switch.
Make sure ignition switch is OFF. Remove key from
3
6
5.
Disassemble console arm to gain access to PTO
Figure 66
switch (see Console Arm Disassembly in the Service
and Repairs section of Chapter 7 -- Chassis).
1.
2.
3.
COM B terminal
NO B terminal
NC B terminal
4.
5.
6.
COM C terminal
NO C terminal
NC C terminal
6.
66.
The switch terminals are marked as shown in Figure
The circuit logic of the PTO switch is shown in the
SWITCH
CLOSED
OPEN
CIRCUITS
charttotheright.Withtheuseofamultimeter(ohmsset-
ting), the switch functions may be tested to determine
whether continuity exists between the various terminals
foreachposition.Verifycontinuitybetweenswitchtermi-
nals. Replace switch if testing identifies a faulty switch.
POSITION
CIRCUITS
OFF (DOWN)
COM B + NC B COM B + NO B
COM C + NC C COM C + NO C
ON (UP)
COM B + NO B COM B + NC B
COM C + NO C COM C + NC C
7.
Connect the wire harness connector tothe switch af-
ter testing.
Groundsmaster 5900/5910
Page 5 -- 37
Electrical System
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