Toro Reelmaster 5510 Series, Service Manual

Page: 440 / 662

Backlap Switches
g214065
Figure 253
1. Ball 4. Dowel pin 7. Rear backlap lever
2. Front backlap switch 5. Mow control manifold 8. Front backlap lever
3. O-ring 6. Rear backlap switch
The front and rear backlap switches are normally closed ball switches that are
in the normal, closed state when a backlap lever on the hydraulic mow control
manifold is in the B
ACKLAP
position. When a backlap lever is in the M
OW
position,
the switch opens. The backlap switches are attached to the hydraulic mow
control manifold located under the seat (
Figure 253 ).
The Toro Electronic Controller (TEC) uses the backlap switches as inputs to
prevent some normal operations during backlapping (e.g., to prevent the cutting
reels from raising during backlapping).
Testing the Backlap Switches
1. Park the machine on a level surface, lower the cutting units, set the parking
brake, and shut off the engine.
2. Before you disconnect the backlap switch for testing, ensure that you test the
switch and its circuit wiring as TEC input with the InfoCenter display; refer to
Using the InfoCenter Display for Troubleshooting (page 7–28) .
3. If the InfoCenter verifies that the backlap switch and circuit wiring are
functioning correctly, no further switch testing is necessary.
4. If the InfoCenter determines that the backlap switch and circuit wiring are not
functioning correctly, proceed with the test.
5. Ensure that the key switch is in the O
FF
position.
6. Raise and secure the operator seat to get access to the backlap switch.
Locate the backlap switch on the hydraulic mow control manifold ( Figure 253 ).
7. Disconnect the wire harness electrical connector from the backlap switch.
8. Check the continuity of the switch by connecting a multimeter (ohms setting)
across the switch connector terminals.
9. With the key switch in the O
FF
position, turn the backlap lever to the backlap
position while watching the multimeter. Continuity should be made as the
switch closes.
10. Turn the backlap lever to the M
OW
position while watching the multimeter.
Continuity should be broken as the switch opens.
Electrical System: Testing the Electrical Components Page 7–84 Reelmaster ® 5410/5510/5610 Series
15216SL Rev C