Toro 4100-D service manual Cutting Deck Raise and Lower Switches

Cutting Deck Raise and Lower Switches

The deck raise and lower switches are normally open proximity switches that are located under the console housing (Fig. 56). These identical switches are mounted in opposite directions so their circuit logic differs. The ac- tuator for the switches is on the center deck lift/lower le- ver. The raise and lower switches are used in conjunction with the down latching relay to provide cur- rent to the PTO switch.

The deck raise switch is closed when the center deck lift/ lower lever is either in the neutral (center) position or pushed to the lower (forward) position. If the center deck lift/lower lever is pulled to the raise (rear) position, the deck raise switch opens.

The deck lower switch is closed when the center deck lift/lower lever is pushed to the lower (forward) position. If the center deck lift/lower lever is in either the neutral (center) position or the raise (rear) position, the deck lower switch remains open.

Once the down latching relay is energized by lowering the cutting deck, the cutting deck raise switch and diode D3 provide a latching circuit to keep the relay energized.

Testing

1.Park machine on a level surface, lower cutting deck, stop engine, engage parking brake and remove key from the ignition switch.

2.Remove console cover and locate cutting deck raise or lower switch to be tested. Disconnect switch connec- tor from machine wiring harness.

3.Check switch continuity by connecting a multimeter (ohms setting) across the switch connector terminals.

4.The raise switch should be closed (continuity) when the center deck lift/lower lever is in the neutral position. As the lift/lower lever is slowly pulled back, the raise switch should open (no continuity) after the lever has re- moved all free play (with no spool movement in lift/lower control valve) but before the deck is lifted.

5.The lower switch should be open (no continuity) when the center deck lift/lower lever is in the neutral position. As the lift/lower lever is slowly pushed forward, the lower switch should close (continuity) before the le- ver reaches full forward travel.

6.For switch adjustment procedure, see Cutting Deck Raise and Lower Switches in the Adjustments section of this chapter.

7.Connect switch to wiring harness. Install console cover to machine.

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5	4
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9
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Figure 56

1.	Deck lower switch	6.	Flange bolt (2 used)
2.	Deck raise switch	7.	Tab plate
3.	Switch plate	8.	Deck lift/lower lever
4.	Lever bracket	9.	Switch actuator
5.	Flange nut	10.	Lock nut (2 used)

Electrical System

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