RADIATOR, HOSE AND PRESSURE CAP

PRESSURIZED

1-242

Figure I - Cooling System-Sectional 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. 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 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. 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

Temperature

20°F. 10°F. O°F. -10"F. -20"F. -30cF. Ethylene Glycol

6 pts. 8 pts. 11 pts. 12 pts. 14 pts. 15 pts.

British Imperia l Anti-Freeze Chart

Temperature

20°F. lO"F. O"F. -10°F. -20"F. -30"F. Ethylene Glycol

51/4 pts. 7 pts. 9% pts. 10 1/4 pts. 12 pts. 121/2 pts.

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.

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 open at 3.5-4.5 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. The cap must provide an absolutely air-tight seal at all times for the system to operate properly. If defective, the cap should be replaced.

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

hoses. Slide the hose off the radiator connection and the cylinder head water outlet connection (upper hose) or the water pump connection (lower hose). To install new hoses, position the clamp on each end of the new hose, slide the hose on the connections, and tighten the clamp bolts securely. Fill the radiator with coolant, then run the engine for several minutes and check each hose and connections for leaks.

C. Radiator Removal

All Except Series 1801:

1. Drain the radiator. Remove the radiator cap to assist draining action. Remove the grille and hood.

2. Loosen the radiator upper and lower hose clamps and slide the hose off the radiator upper connec· tion.

3. Remove the lower hose, then remove the two nuts and washers from the bottom of the radiator and lift the radiator from the tractor.

NOTE: The Ian shroud, Figure 2, is attached to the radiator. It will be necessary to remove the shroud if lite radiator is to be recondi. tioned.

Figure 2-Radiator Assembly and Pressure Cap

Series 180i Tractors:

1. Drain the cooling system. 2. Remove the four screws that attach the grille door to the grille and remove the door. 3. Drain the hydraulic fluid from the reservoir. Disconnect the hose from each side of the reservoir and cap all openings to prevent entry of dirt. 4. Disconnect the headlamp wires from the headlamp wiring harness. 5. Remove the six bolts that attach the grille to the frame. Remove the medaHionfrom the grille. 6. Remove the six bolts and insulators that attach the hood to the grille. 7. Place a chain or rope sling through the medallion opening and carefully lift the grille from the tractor with a hoist.

8. Disconnect the two oil cooler lines from the radiator lower tank and cap all openings. Disconnect the upper and lower hoses from the radiator. Remove the two attaching nuts and flatwashers from the lower end of the radiator.

Lift the radiator and fan shroud from the tractor as an assembly.

D. Radiator Installation

All Except Series 1801:

1. Carefully position the radiator in the tractor. Be sure the insulation pads are in place around each bolt hole in the bottom of the radiator.

2. Secure the radiator with the two attaching nuts and flatwashers.

3. Slide the upper hose on the radiator connection and tighten the hose damp securely, Install the lower hose and tighten the damps securely. 4. Fill the cooling system with the proper coolant, then run the engine and check the system for leaks.

5. Install the hood and grille.

Series 1801 Tradors:

1. Position the radiator and shroud assembly in place on the frame and install the two attaching flatwashers and nuts. Connect the upper and lower hoses to the radiator.

2. Connect the two oil cooler lines to the radiator lower tank.