anti-freeze is recommended. Before using anti-freeze in the system, be sure all water connections and cylinder head bolts are tight. If anti-freeze is unnecessary in the area where the tractor is operated, the cooling system should be treated with a rust and corrosion inhibitor as previously recommended.
PRESSURIZED
IMPORTANT: Calcium chloride must never be used because it will corrode and clog the cooling system in (t .,hoT! lime. The following charts show the amount of anti-freeze required to protect the cooling system from freezing, The capacity of the system is 15 qts. for all tractors. United States Anti-Freeze Chart Ethylene Glycol
Temperature """,...,..,.
~~-
20°F . 10°F. O°F. -10"F. -20 "F. -30 c F.
1-24 2
Figure I - Cooling System-Se ctiona l View or radiator and, in time, will cause engine overheating that may eventually result in a cracked cylinder block or head. If water containing lime or alkali must be used, add a water softener purchased from a reputable company, in the amount shown on the container.
c.
6 8 11 12 14 15
pts. pts. pts. pts. pts. pts.
British Imperia l Anti-Freeze Chart Temperature
eooling System Protection-And-freeze
If the temperature falls below the freezing point of 32 OF., anti-freeze must be added to the cooling system. Alcohol is not recommended as protection against freezing because it starts to boil at about 170"F ., and during heavy-duty operation, the tractor may operate at temperatures above this figure. Therefore, permanent type
20 °F . lO"F. O"F. -10°F. -20"F . -30"F.
Ethylene Glycol 5 1/4 7 9% 10 1/4 12 121/2
pts. pts. pts. pts. pts. pts.
RADIATOR, HOSE AND PRESSURE CAP The pressure type cooling system in the Ford Tractor maintains a regulated pressure of 3 1/2 to 4lh lbs. during operation. With a pressure system, the coolant boils at a higher temperature than normally. It is important, therefore, that all elements of the cooling system are operating properly at all times. A complete radiator assembly is shown in Figure 2.
open at 3.5-4.5 ps~ allowing the coolant to escape through the overflow pipe, Figure 2. When pressure in the system becomes lower than atmospheric pressure, the vacuum valve opens at 0-.25 psi until the pressure in the system and the atmospheric pressures are approximately equalized. T he cap must provide an absolutely air-tight seal at all times for the system to operate properly. If defective, the cap should be replaced.
A. Radiator Pressure Cap The radiator is sealed with a pressure cap. Inside the cap are two valves. The targer valve is the pressure valve, and the smaller one is the vacuum valve. When the coolant boils, pressure in the system forces the pressure valve
B. Radiator Hoses Radiator hoses should be replaced whenever they become cracked or soft. To replace the hoses, drain the radiator then loosen the clamp bolt at each end of the
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