Toro 4045 Operator's Manual page 102

Draining the Coolant from the System
Important: Do not pour coolant onto the ground or into
an unapproved container that can leak.
1. Park the machine on a level surface, stop the engine,
and remove the ignition key.
2. Allow the engine to cool.
3. Open the rear-access door.
Note: Look to the left when you open the rear-access
door, and you will find the drain plug tucked away in
the back-left corner.
4. Place a drain pan under the drain plug
Note: The coolant capacity of both the engine and
the radiator is 16.8 L (17.7 US qt).
Figure 141
1. Radiator drain plug
5. Open the drain plug for the radiator and allow the
coolant system to drain completely.
Note: Dispose of the used coolant properly according
to local codes.
6. Clean the threads on the drain plug and apply 3 layers
of PTFE sealing tape.
7. Close the drain plug
(Figure 141).
(Figure 141).
Flushing the Cooling System
Engine and radiator coolant capacity: 16.8 L (17.7 US qt)
1. Park the machine on a level surface, stop the engine,
and remove the ignition key.
2. Condition the cooling system as follows:
A. Ensure that the coolant is drained from the
radiator and that the drain plug is closed; refer to
Draining the Coolant from the System (page
B. Add a cooling system cleaning solution to the to
the radiator through the filler neck
Note: Use cleaning solution of 21 g (12 oz dry)
of sodium carbonate for every 17 L (18 US qt)
of water; otherwise, use a commercially available
equivalent. Follow the directions that come with
the cleaning solution.
1. Filler neck (radiator)
2. Funnel
C. Close the drain plug
Important: Do not install the radiator cap.
D. Operate the engine for 5 minutes or until the
coolant temperature indicates 82° C (180° F), and
then stop the engine.
CAUTION
The cleaning solution is hot and can
cause burns.
Stay away from the discharge end of the
coolant drain plug.
E. Open the drain plug for the radiator, and drain
the cleaning solution into a drain pan.
F. Clean the threads on the drain plug and apply 3
layers of PTFE sealing tape.
G. Close the drain plug.
3. Flush the cooling system as follows:
102
(Figure
Figure 142
3. Coolant-system cleaning
solution
(Figure 141).
102).
142).