Cutting Unit Down Limit Switch - Toro Reelmaster 5010- H Service Manual

Cutting Unit Down Limit Switch

The cutting unit down limit switch is a normally open
proximity switch that closes when the front, outside cut-
ting units are in the turn- around position. The down limit
switch is attached to a frame bracket inside the front,
right lift arm pivot tube. A bracket on the front, right lift
arm acts as the sensing plate for the down limit switch
(Fig. 46). The Toro Electronic Controller (TEC) monitors
the operation of the cutting unit down limit switch.
Testing
NOTE: Before disconnecting the cutting unit down limit
switch for testing, the switch and its circuit wiring should
be tested as a TEC controller input with the InfoCenter
Display (see Diagnostics Screen (Backlap item) in the
InfoCenter Display section of this chapter). If the Info-
Center Display verifies that the down limit switch and cir-
cuit wiring are functioning correctly, no further down limit
switch testing is necessary. If the InfoCenter Display de-
termines that the down limit switch and circuit wiring are
not functioning correctly, proceed with down limit switch
testing using the following steps.
1. Park the machine on a level surface, engage the
parking brake, lower the cutting units and stop the en-
gine.
2. Test cutting unit down limit switch as follows:
A. Turn ignition switch to the ON position (do not
start engine) and check LED on cable end of down
limit switch.
B. LED should be illuminated when the cutting units
are lowered. LED should not be illuminated when
the cutting units are raised to the turn around posi-
tion.
3. If the cutting unit down limit switch LED did not func-
tion correctly:
A. Make sure that down limit switch is properly ad-
justed (see Cutting Unit Down Limit Switch in the Ad-
justments section of this chapter). If necessary,
adjust switch and return to step 2 above.
B. Make sure ignition switch is OFF and disconnect
the down limit switch connector from the machine
wire harness.
C. Using a multimeter, verify that the machine wire
harness connector terminal for black wire is closed
(continuity) to ground.
Reelmaster 5010- H
D. Turn ignition switch to the ON/PREHEAT position
(do not start engine) and verify with a multimeter that
machine wire harness connector terminal for down
limit switch pink wire has system voltage (12 VDC)
present.
E. Turn ignition switch to the OFF position.
F. If black wire is closed to ground, pink wire has
system voltage present and switch LED did not func-
tion, replace cutting unit down limit switch. Adjust
switch during installation (see Cutting Unit Down
Limit Switch in the Adjustments section of this chap-
ter).
4. If the down limit switch tests correctly and a circuit
problem still exists, check circuit wire harness (see Elec-
trical Schematic and Wire Harness Drawings in Chapter
9 - Foldout Drawings).
5. Make sure that wire harness electrical connector is
connected to the down limit switch after testing.
Switch
LED Location
FRONT
1. Down limit switch
2. Lock washer
Page 5 - 55
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2
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4
Figure 46
3. Jam nut
4. Lift arm
Electrical System
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