Stopping The Engine; Breaking In A New Or Rebuilt Engine; Operating The Machine In Extreme Conditions - Toro 25430A Operator's Manual

•
To increase the engine speed, push the throttle center
button while pulling out the throttle (Figure 22).
1. Throttle button
2. Throttle knob
•
To decrease the engine speed, push the throttle center
button while pushing in the throttle.
•
To finely increase the engine speed, rotate the throttle
knob counterclockwise.
•
To finely decrease the engine speed, rotate the throttle
knob clockwise.

Stopping the Engine

1. Park the machine on level ground, if possible.
Important: If you must temporarily park the
machine on a slope or an incline, position the
machine at a right angle to the slope, with the
front of the machine toward the bottom of the hill.
Ensure that the machine is behind an object that
will not move.
2. Support or lower all attachments to the ground.
3. Set the parking brake.
4. If the machine has been operating under a heavy load,
decrease the engine speed to 1/4 throttle for 2 minutes
to evenly cool the engine.
5. Push the throttle lever to the Slow position, and turn
the key switch to the Off position.
6. If you leave the machine unattended, remove the key
from the ignition switch.
Figure 22
3. Throttle lock
Breaking in a New or Rebuilt
Engine
During the first 20 hours of operation of a new or rebuilt
engine, do the following:
•
Keep the engine at a normal operating temperature.
•
Do not run the engine at low idle speeds for long periods
of time.
•
Operate the machine with normal loads for the first 8
hours.
•
Do not use special "break-in" lubricating oil. Use the
specified oil; refer to Checking the Engine Oil Level (page
23) and Changing the Engine Oil Filter (page 39).
Operating the Machine in
Extreme Conditions
Both hot and cold weather place unusual demands upon
the machine and the attachments. You can minimize
temperature-related problems on the machine by performing
the following steps:
Hot Weather
1. Clean all dirt and debris from the radiator, hydraulic oil
cooler, and engine area to ensure that there is proper
air flow to cool the engine.
2. Wipe any debris from the air inlets in the hood side
panels.
3. Use lubricants that have the correct viscosity.
4. Check the air cleaner dust valve more frequently in
extremely dusty conditions.
5. Check the condition of the fan drive belt. Replace it if
it is cracked or worn.
6. Operate the machine at an appropriate engine speed
and transmission range for the operating conditions;
do not overload the engine.
7. Test the radiator cap before the hot weather begins;
replace the cap if it is damaged.
8. Maintain the correct coolant level in the reservoir and
in the radiator, and ensure that there is a mixture of
50% ethylene glycol and 50% water in the cooling
system.
Cold Weather
Operating your machine in cold weather requires special
attention to prevent serious damage to the machine.
Performing the following procedures will extend the service
life of your machine:
1. Clean the battery and ensure that it is fully charged.
Note: A fully charged battery at -17ºC (0ºF) has
only 40% of the normal starting power. When the
temperature decreases to -29ºC (-20ºF), the battery has
only 18% of the normal power remaining.
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