Checking The Cooling System; Adding Fuel - Toro 03660 Operator's Manual

gauge. Engine failure may occur as a result of
over filling or under filling the engine oil.
6. Install the oil fill cap and close the hood.

Checking the Cooling System

Clean debris off of the screen, oil cooler, and front
of the radiator daily and more often if conditions are
extremely dusty and dirty. Refer to the section on
Removing Debris from the Cooling System in , page .
The cooling system is filled with a 50/50 solution
of water and permanent ethylene glycol antifreeze.
Check the level of coolant in the expansion tank at the
beginning of each day before starting the engine. The
capacity of the cooling system for the model 5210 is 5.5
quarts (5.2 l). The capacity for model 5410 is 7.0 quarts
(6.6 l) and models 5510 5610 is 10.0 quarts (9.5 l).
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.
• Use a rag when opening the radiator cap,
and open the cap slowly to allow steam to
escape.
1. Check the level of coolant in the expansion tank
(Figure 33).
The coolant level should be between the marks on
the side of the tank.
Figure 33
1. Expansion tank
2. If the coolant level is low, remove the expansion
tank cap and replenish the system. Do not overfill.
3. Install the expansion tank cap.

Adding Fuel

Use only clean, fresh diesel fuel or biodiesel fuels with
low (<500 ppm) or ultra low (<15 ppm) sulfur content.
The minimum cetane rating should be 40. Purchase
fuel in quantities that can be used within 180 days to
ensure fuel freshness.
Fuel tank capacity: 13.5 gallons (51 l)
Use summer grade diesel fuel (No. 2-D) at temperatures
above 20° F (-7° C) and winter grade (No. 1-D or
No. 1-D/2-D blend) below that temperature. Use of
winter grade fuel at lower temperatures provides lower
flash point and cold flow characteristics which will ease
starting and reduce fuel filter plugging.
Use of summer grade fuel above 20° F (-7° C) will
contribute toward longer fuel pump life and increased
power compared to winter grade fuel.
Important: Do not use kerosene or gasoline
instead of diesel fuel. Failure to observe this
caution will damage the engine.
Fuel is harmful or fatal if swallowed. Long-term
exposure to vapors can cause serious injury and
illness.
• Avoid prolonged breathing of vapors.
• Keep face away from nozzle and gas tank or
conditioner opening.
• Keep fuel away from eyes and skin.
Biodiesel Ready
This machine can also use a biodiesel blended fuel
of up to B20 (20% biodiesel, 80% petrodiesel). The
petrodiesel portion should be low or ultra low sulfur.
Observe the following precautions:
• The biodiesel portion of the fuel must meet
specification ASTM D6751 or EN14214.
• The blended fuel composition should meet ASTM
D975 or EN590.
• Painted surfaces may be damaged by biodiesel
blends.
• Use B5 (biodiesel content of 5%) or lesser blends
in cold weather.
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