Cooling System 3.
RADIATOR
1.
The Radiator is the flat tube type with the core and water tanks combined in one Integral Unit. It is enclosed within a Grille and fan housing which are removable for cleaning. Radiator cap is a pressure cap and is fitted on the filler neck. The pressure cap has the following functions
Fig. 1 - Operation of the Pressure adjusting valve 1. Cap top 2. Overflow tube
3. Rubber pad 4. Filler neck
a)
Pressures the System thus raising the boiling point of the Coolant.
b)
To prevent the water vaporization of the Coolant.
c)
The Cap releases excess pressure via the overflow tube in the filler neck when the pressure rises beyond the specified (13 PSI) pressure. The pressure inside the Radiator is always maintained within close limits of the Valve specified on the Cap.
d)
The Cap also has a vacuum release valve which relieves vacuum created when the engine is cools and coolant temperature drop. The Valve opens and equalises the System Pressure with atmosphere via, overflow tube of the filler neck (see fig 1B).
NOTE: Fig. 1B - Operation of the vacuum release valve 1. Cap top 2. Overflow tube
3. Rubber pad 4. Filler neck
2.
Removal
a.
Drain the cooling system.
b.
Remove the vertical exhaust silencer, precleaner and raise the hood.
c.
Disconnect the battery earth cable before disconnecting any electrical system.
d.
Unclip the main cable harness from the bottom of the radiator.
e.
Disconnect the head lamp and horn cables if fitted.
f.
Remove the bolts from the bottom of the radiator grille and remove the hood and radiator grille.
g.
Open the Radiator and crankcase drain plugs and allow the system to drain.
h.
Disconnect the radiator brace at the radiator end (5-4).
i.
Loosen the clamps (1,2-4) on the radiator also remove hoses (3,4-4) and work the free of the inlet and outlet pipes of the radiator.
j.
Remove the two nuts from the bolts securing the radiator to the front axle support and lift the radiator and rubber pads clear.
k.
Remove the fan housing from the radiator.
Fig. 2
A. B. C. D.
Alternator Mounting Alternator Adjusting Bolt Adjusting Bracket
35 Series 4WD, Model - 3535, 4035, 4535 and 5035 SM June’08
If the Radiator Cap is defective i.e. Rubber Seals and Valve Springs broken, replace it:
C-81
