Toro Reelmaster 3555-D - Turn Around Switch (RM 3555−D;3575−D)

Reelmaster 3550−D/3555−D/3575−D Page 5 − 37 Electrical System
Turn Around Switch (Reelmaster 3555−D and 3575−D)
The cutting unit turn around switch is a normally open
proximity switch that closes when the front right cutting
unit (cutting unit #5) is in the turn−around position. The
turn around switch is attached to a bracket outside the
front right lift arm pivot pin. A plate on the front right lift
arm acts as the sensing plate for the turn around switch
(Fig. 42).
The TEC controller monitors the position of the turn
around switch (open or closed). Using inputs from the
turn around switch and other switches in the interlock
system, the TEC controller controls the energizing of the
proportional relief valve (PRV) used to drive the cutting
unit motors, and solenoid valves (S1, S3, and S4) used
to raise the cutting units (see Table 3: Input Conditions
Required to Illuminate Diagnostic Display Outputs in
this chapter).
Testing
1. Park machine on level surface, lower cutting units,
stop engine, apply parking brake and remove key from
ignition switch.
2. Make sure the turn around switch is properly adjust-
ed (see Turn Around Switch in the Adjustments section
of this chapter).
3. Before disconnecting the switch for testing, the
switch and its circuit wiring should be tested as a TEC
electrical input using the Diagnostic Display (see Diag-
nostic Display in this chapter). If input testing verifies
that the switch and circuit wiring are functioning correct-
ly, no further switch testing is necessary. If, however, in-
put testing determines that the switch and circuit wiring
are not functioning correctly, proceed with the following
switch testing procedure.
4. Make sure ignition switch is OFF and disconnect the
turn around switch connector from machine wire har-
ness.
5. Verify that the machine wire harness connector ter-
minal for black wire is closed (continuity) to ground.
1. Signal plate
(on lift arm #5)
2. Turn around switch
Figure 42
1
2
6. Turn ignition switch to the ON position (do not start
engine) and verify with a multimeter that machine wire
harness connector terminal for pink wire has system
voltage (12 VDC) present.
7. If the black wire is closed to ground, the pink wire has
system voltage present and the switch is properly ad-
justed, replace and adjust the turn around switch.
8. Reconnect switch after testing.
Electrical
System