Toro Workman 3000 Series, Service Manual

Page: 176 / 306

Rev. D
Workman 3000/4000 Series Page 8 -- 6 Electrical System
Verify Interlock System Operation
The purpose of the interlock system is to prevent the en-
gine from cranking or starting unless the clutch pedal is
depressed (all models), the hydraulic lift lever is in the
neutral position (TC models) and rear PTO (if so
equipped) is disengaged.
CAUTION
Check the operation of the interlock switches
daily for proper operation. Replace any malfunc-
tioning switches before operating the machine.
To verify clutch interlock switch operation:
1. Sit on operator’s seat and engage parking brake.
Move shift lever to NEUTRAL position. On TC models,
make sure that hydraulic lift lever is in neutral position.
Disengage rear PTO (if so equipped).
2. Without depressing clutch pedal, rotate ignition key
clockwise to START position.
3. If engine cranks or starts, there is a malfunction in the
interlock system that must be repaired before operating
vehicle.
To verify operation of hydraulic lift interlock switch
(TC models):
1. Sit on operator’s seat and engage parking brake.
Move shift lever to NEUTRAL position. Disengage rear
PTO (if so equipped).
2. Move hydraulic lift lever out of neutral position.
3. Depress clutch pedal and rotate ignition key clock-
wise to START position.
4. If engine cranks or starts, there is a malfunction in the
interlock system that must be repaired before operating
vehicle.
To verify rear PTO interlock switch (if equipped) op-
eration:
1. Sit on operator’s seat and engage parking brake.
Move shift lever to NEUTRAL position. On TC models,
make sure that hydraulic lift lever is in neutral position.
2. Engage rear PTO.
3. Depress clutch pedal and rotate ignition key clock-
wise to START position.
4. If engine cranks or starts, there is a malfunction in the
interlock system that must be repaired before operating
vehicle.