Hydraulic Lift Lever Interlock Switch - Toro Workman HDX Auto Service Manual

Hydraulic Lift Lever Interlock Switch

The lift lever interlock switch is a normally open proximity
switch that is attached to the control lever support (Fig.
17). The interlock switch is in its normal open position
whenever the hydraulic lift lever is moved away from the
neutral position. When the lift lever is in the neutral posi-
tion, the retainer pin that attaches the lift lever link to the
lift valve is positioned close to the interlock switch caus-
ing the switch to close. The closed lift lever switch is used
in the starting interlock system to make sure that the hy-
draulic lift circuit is disengaged during engine starting.
Testing
1. Park vehicle on a level surface, shut engine off, re-
move key from ignition switch and apply parking brake.
2. Remove knobs from control levers, then remove con-
trol plate assembly from seat base (Fig. 18).
3. Locate the hydraulic lift lever interlock switch (Fig.
17).
4. Disconnect the wire harness connector from the lift
lever interlock switch.
5. With the use of a multimeter (ohms setting), test for
continuity across the two (2) switch terminals. There
should be continuity (zero ohms) when the lift lever is
in the neutral position and there should not be continu-
ity (infinite ohms) when the lever is not in the neutral
position.
6. Replace lift lever interlock switch if testing proves it
to be faulty.
7. After switch testing is completed, connect the wire
harness connector to the lift lever interlock switch.
8. Secure center console control plate to seat base with
removed screws. Torque screws a maximum of 12 in−lb
(1.3 N−m). Install knobs on control levers.
Adjustment
The hydraulic lift lever interlock switch should be adjust-
ed so that the engine will not crank if the hydraulic lift
lever is locked in the forward position by the detent lever.
The engine should crank if the hydraulic lift lever is in any
other position when the interlock switch is adjusted cor-
rectly.
NOTE: Remove seat base if hydraulic lift lever interlock
switch needs to be adjusted (see Seat Base in the Ser-
vice and Repairs section of Chapter 5 − Chassis).
Adjust interlock switch position by loosening lock nut and
moving switch for proper operation (Fig. 19). Tighten
lock nut after adjustment.
Electrical System
2
3
1. Lift lever
2. Interlock switch
FRONT
1
1. Seat base
2. Control plate
FRONT
1. Lift lever
2. Switch
3. Carriage screw
Page 6 − 16
1
FRONT
Figure 17
3. Retainer pin
12 in−lb (maximum)
(1.3 N−m)
3
2
Figure 18
3. Screw (6)
5
2
4
3
Figure 19
4. Switch plate
5. Lock nut
Workman HDX Auto
1