Changing The Engine Coolant - Toro 07379 Operator's Manual

6. Clean the radiator, oil cooler, and screen thoroughly
with compressed air.
Note: Blow debris away from the radiator.
7. Install the cooler and screen to the radiator.

Changing the Engine Coolant

Service Interval: Every 1,000 hours/Every 2 years
(whichever comes first)
Engine-coolant type: a 50/50 mixture of water and
permanent ethylene
CAUTION
If the engine has been running, the pressurized, hot
coolant can escape and cause burns.
• Do not open the radiator cap when the engine
is running.
• Allow engine to cool at least 15 minutes or until
the radiator cap is cool enough to touch without
burning your hand.
• Use a rag when opening the radiator cap, and
open the cap slowly to allow steam to escape.
Drain the engine coolant from the cooling system as follows:
1. Park the machine on a level surface.
2. Remove the radiator cap.
1. Radiator cap
3. Remove the reserve tank cap.
Figure 50
1. Reserve tank cap
4. Disconnect the lower radiator hose and allow coolant
to flow into a drain pan.
Note: When coolant stops, connect the lower radiator
hose.
5. Align the drain pan beneath the drain petcock on the
engine.
6. Open the coolant drain petcock on the engine and
allow the coolant to flow into a drain pan.
7. When the coolant stops draining, close the petcock.
Fill the cooling system with coolant as follows:
1. Slowly fill the radiator with a 50/50 mixture of water
and permanent ethylene glycol anti-freeze
2. Top off the radiator and install the cap.
3. Slowly fill the reserve tank until level reaches the
bottom of the filler neck (Figure 51). Do not overfill
the reservoir.
4. As air escapes, fill the reservoir to the bottom of the
filler neck.
5. Install the reserve tank cap (Figure 51).
6. Run the machine until it reaches the operating
temperature.
Note: Do not allow the engine to heat up to the full
running temperature.
7. Turn off the machine and allow it to cool.
8. Check the coolant level again, and replenish it, if
required.
37
G019522
Figure 51
1