Cooling System

to remove the dust particles and impediments stuck to the fins and tubes.

The Radiator should then be blown dry with compressed air.

The Radiator is now ready for installation.

4.Installation

1.Assemble the fan housing to the radiator.

2.Position the radiator mounting pads on the front axle support over the radiator bolt holes. Lift the radiator into position and fit the nuts.

3.Reassemble the inlet and outlet hoses end tighten the clamps securely.

4.Reconnect the radiator brace.

5.Place the hood and radiator grille in position and secure with the two pivot bolts.

6.Connect the head lamp and horn cables.

7.Replace the main harness into the clip at the bottom of the radiator and secure the clip.

8.Connect the battery earth lead.

9.Fill the radiator with clean coolant solution.

10.Lower the hood into position and fit the exhaust silencer and precleaner.

5.FAN AND FAN BELT : a.Raise the hood. b.Remove the radiator to cylinder head cover brace. c.To remove the fan belt, loosen alternator brace & pivot bolt. Start the belt over the outer flange of the main pulley (ALTERNATOR). Slowly crank the engine at the same time and the belt will work off the pulley. Withdraw the belt between the pulley and the bolster. The belt can now be worked over the fan blades. d.Remove the six round headed capscrews (6-4) and their washers and nuts which secure the fan housing to the radiator and move the housing back towards the pulley as far as possible. e.Remove the four capscrews which secure the fan to the pulley hub. To remove these capscrews work from the right hand side of the machine and ensure that each capscrew is rotated up to the 12 o’clock position as it is being removed. (See illust / Fig.4).

Little need be said about servicing the Fan but it should be checked occasionally for loose or bent blades. Either condition will usually make its presence felt by Fan vibration.

Damaged/unbalanced Fan Blades are to be replaced as they are difficult to balance. The Fan Belt needs periodical inspection. The belt tension is correct when it can be depressed 3/8" to 1/2" by thumb pressure midway between the pulleys (see fig. 2).

2.Installation

a.Insert the fan into position from the right hand side of the machine.

b.Attach the fan to the pulley hub with one capscrew loosely screwed down. Turn the fan and hub until the next hole is at the 12 o’ clock position and insert the second capscrew and only half tighten down. Repeat this procedure for the following capscrew, then tighten the four capscrews down very carefully and securely.

c.Check and ensure that the fan blades do not foul the fan housing.

d.When replacing the belt, reverse the procedure outlined under “REMOVING THE FAN BELT” except that the belt can be started on the lower pulley (CRANKSHAFT) by hand. By slowly cranking engine, the belt will find the correct position.

6.WATER PUMP

The water pump circulates the Coolant at rates up to several thousand liters an hour. The water pump is a centrifugal type with self lubricated sealed two row ball bearings. The Impeller is an interference fit to the rear end of the spindle bearing shaft and pulley hub is an interference fitted to front end of it. The Spindle Shaft is provided with Seal. The Water Pump is fastened to the front end of the Crankcase. The Water Pump and Fan Assembly is Belt driven by the Engine Crankshaft Pulley.

NOTE: If you do carry out repairs, be sure to fit all new Seals and Gaskets when reassembling the Unit.

1.Removal a.Drain the cooling system. b.Remove the vertical exhaust silencer, precleaner and raise hood. c.Remove the fan (Refer to para.5 REMOVAL).