Toro 25450 Operator's Manual page 68

D. Open the drain valve and drain the cleaning
solution into a drain pan
101).
E. Close the drain valve
2. Flush the cooling system as follows:
A. Fill the cooling system with clean water
104).
Figure 104
1. Filler neck (recovery tank)
2. Funnel
B. Operate the engine for 5 minutes or until the
coolant temperature in the command-center
display indicates 82°C (180°F), then stop the
engine.
CAUTION
The water is hot and can cause burns.
Stay away from the discharge end of the
coolant drain hose.
C. Open the drain valve
water into a drain pan.
D. If the water drained from the radiator is dirty,
perform steps
drained from the radiator is clean.
E. Close the drain valve
Filling the System with Coolant
The coolant capacity of the engine and the radiator: 18.5
L (19.5 US qt).
Important: Fill the cooling system properly to prevent
air locks in the cooling passages. Failing to vent the
(Figure 99 and
(Figure 101).
3. Clean water
(Figure 101) and drain the
2-A through 2-C until the water
(Figure 101).
cooling system properly can damage both the engine
Figure and the cooling system.
1. Remove the radiator cap from the recovery tank
(Figure
2. Fill the cooling system with the specified coolant
mixture
(Figure
midpoint in the sight gauge
1. Coolant level (midpoint in
the sight gauge)
2. Funnel
3. Install the recovery-tank cap
4. Start the engine and run it at half throttle for 5 minutes.
5. Stop the engine and remove the key.
6. Wait 30 minutes, then check the fluid level in the
recovery tank. If it is low, add coolant.
7. Close the reservoir door and secure it to the hood with
the 2 hex-head bolts
step 2
66).
8. Install the side panels; refer to
(page
68
98).
(Figure 105) until the fluid level is up to the
(Figure
Figure 105
3. Coolant (a mixture of 50%
ethylene glycol and 50%
water)
(Figure
(Figure 98) that you removed in
of Draining the Coolant from the System (page
Installing the Side Panels
46).
98).
98).