Checking The Interlock Switches; Pushing Or Towing The Traction Unit - Toro 30789 Operator's Manual

Checking the Interlock
Switches
Caution
If safety interlock switches are disconnected or
damaged the machine could operate unexpectedly
causing personal injury.
Do not tamper with the interlock switches.
Check the operation of the interlock switches
daily and replace any damaged switches before
operating the machine.
Replace switches every two years or 1000 hours,
whichever occurs first, regardless of whether
they are operating properly or not.
The machine has interlock switches in the electrical system.
These switches are designed to stop the engine when
operator gets off the seat while either the PTO lever is
engaged or traction pedal is depressed. However, operator
may get off the seat while engine is running. Although
engine will continue to run if PTO lever is disengaged and
traction pedal is released, it is strongly recommended that
the engine be stopped before dismounting from the seat.
Also, engine will stop if traction pedal is depressed when
parking brake is engaged.
To check operation of interlock switches:
1. Drive the machine slowly to a large, relatively open
area. Lower cutting unit, stop the engine and apply
parking brake.
2. Sit on seat. Move PTO lever to ON position. With the
traction pedal in neutral position, try to start the engine.
The engine should not crank. If the engine cranks, there
is a malfunction in the interlock system that should be
corrected before beginning operation.
3. Sit on seat. Move PTO lever to OFF and depress the
traction pedal. Try to start the engine. The engine
should not crank. If the engine cranks, there is a
malfunction in the interlock system that should be
corrected before beginning operation.
Warning
Do not operate the machine without an implement
unless the PTO drive shaft is also removed.
4. Sit on seat and start the engine. Raise off the seat and
move the PTO lever to ON. The engine should stop
within 2-3 seconds. If the engine does not stop, there is
a malfunction in the interlock system that should be
corrected before beginning operation.
5. Sit on seat. With parking brake engaged, engine running
and PTO lever disengaged, depress the traction pedal.
The engine should stop within 2-3 seconds. If the
engine does not stop, there is a malfunction in the
interlock system that should be corrected before
beginning operation.
Pushing or Towing the Traction
Unit
In an emergency, the traction unit can be pushed or towed
for a very short distance. However, Toro does not
recommend this as standard procedure.
Important
Do no push or tow the traction unit faster
than 2 to 3 MPH (3 to 4.8 km/h) because transmission may
be damaged. If traction unit must be moved a considerable
distance, transport it on a truck or trailer. Whenever traction
unit is pushed or towed, bypass valve must be open.
1. Reach under traction unit and rotate bypass valve
(Fig. 20) 1/2 to 1 turn counterclockwise. Opening the
valve opens an internal passage in the transmission,
thereby bypassing transmission oil. Because fluid is
bypassed, traction unit can be moved without damaging
the transmission.
1. Bypass valve
2. Before starting engine, close bypass valve by rotating it
clockwise until it is securely seated. Do not exceed 5 to
8 ft.-lb. (7 to 11 N m). Do not start engine when valve is
open.
Important
Running the machine with bypass valve
open will cause the transmission to overheat.
25
1
Figure 20