caution - Toro
caution - Toro
caution - Toro
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Traction Neutral Switch<br />
The traction neutral switch is closed when the traction<br />
pedal is in the neutral position and opens when the pedal<br />
is depressed in either direction. The switch is located on<br />
the right side of the piston (traction) pump (Fig. 48).<br />
Testing<br />
Test the switch by disconnecting the wires from the<br />
switch terminals and connecting a continuity tester<br />
across the two switch terminals. With the engine turned<br />
off, slowly push the traction pedal in a forward or reverse<br />
direction while watching the continuity tester. There<br />
should be indications that the traction neutral switch is<br />
opening and closing. Allow the traction pedal to return<br />
to the neutral position. There should be continuity<br />
across the switch terminals when the traction pedal is in<br />
the neutral position.<br />
1<br />
Figure 48<br />
1. Piston pump (bottom) 2. Neutral switch<br />
2<br />
See the Eaton Model 72400 Servo Controlled Piston<br />
Pump Repair Information at the end of Chapter 4 -- Hydraulic<br />
System for disassembly and assembly procedures<br />
for the neutral switch.<br />
Diode Assemblies<br />
The Groundsmaster 4100--D electrical system includes<br />
several diode assemblies (Fig. 49) that are used for circuit<br />
protection and circuit logic control. The diodes plug<br />
into the wiring harness at various locations on the machine.<br />
2<br />
Electrical<br />
System<br />
The diodes D2, D4, D5 and D6 are used for circuit<br />
protection from inductive voltage spikes that occur when<br />
a hydraulic valve solenoid is de--energized. Diode D2 is<br />
in the Transport/Mow circuit, D4 is in the left cutting deck<br />
circuit, D5 is in the front cutting deck circuit and D6 is in<br />
the right cutting deck circuit.<br />
Diode D9 provides logic for the high temperature warning<br />
system.<br />
1<br />
1. Diode<br />
2. Male terminal<br />
Figure 49<br />
3. Female terminal<br />
3<br />
Diode D3 provides a latching circuit for the cutting deck<br />
when in the lowered position.<br />
If the machine is equipped with the optional cruise control<br />
kit, two (2) additional diodes are used. Diode D7 in<br />
this kit is used for circuit protection that occur when a hydraulic<br />
valve solenoid is de--energized. Diode D8 provides<br />
a latching circuit to keep the cruise relay<br />
energized.<br />
Multimeter<br />
Red Lead (+)<br />
on Terminal<br />
Multimeter<br />
Black Lead ( -)<br />
on Terminal<br />
Continuity<br />
Female Male YES<br />
Male Female NO<br />
Testing<br />
The diodes can be individually tested using a digital<br />
multimeter (diode test or ohms setting) and the table to<br />
the right.<br />
Groundsmaster 4100--D Page 5 - 31 Electrical System
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