LOCATION OF WATER TEMPERATURE REGULATORS

COOLING SYSTEM

SYSTEMS OPERATION

(Industrial Engines)

COOLING SYSTEM WITH CROSS FLOW RADIATOR AND SEPARATE SURGE TANK

(Used on Caterpillar Lift Trucks)

1. Radiator cap. 2. Radiator top tank. 3. Radiator top hose. 4. Shunt line. 5. Housing for water temperature

regulators. 6. Return to housing for water temperature regulators. 7. Cylinder heads (two). 8. Vent tube. 9.

Surge tank. 10. Inside bypass. 11. Radiator bottom tank. 12. Radiator bottom hose. 13. Water pump. 14.

Outlet line for oil cooler. 15. Oil cooler. 16. Inlet line for oil cooler. 17. Cylinder block. A. Orifices between

cylinder heads and front cover. B. Orifice in oil cooler outlet.

radiator is made with a left side tank (2) and a right side

CAUTION:

Never run an engine unless the water

tank (11). The surge tank (9) is either a part of right side

temperature regulators are installed. With no water

tank (11) separated by an inside baffle or a tank

temperature regulators in the system the coolant will

separate from the radiator. Vent tube (8) connects the

continually bypass the radiator and the engine will get too

surge tank (9) to the radiator.

hot.

Surge tank (9) has a shunt line (4) that connects to

the inlet of water pump (13). This shunt type system

keeps a positive pressure on the inlet of water pump (13)

at all times. When putting coolant in the cooling system

coolant from surge tank (9) goes through shunt line (4) to

the inlet of water pump (13) and fills cylinder block (17)

from the bottom. By filling the system from the bottom

any air in the system is pushed out through radiator top

tank (2) through vent tube (8) into surge tank (9).

Radiator cap (1) is used to keep the correct pressure

in the cooling system. This pressure keeps a constant

LOCATION OF WATER TEMPERATURE REGULATORS

supply of coolant to water pump (13). If this pressure goes

too high a valve in radiator cap (1) moves (opens) to get

The vertical radiator is made with a top tank (2)

a reduction of pressure. When the correct pressure is in

above the core and a surge tank (9) either above or

the cooling system the valve in radiator cap (1) moves

separate from the top tank. Vent tube (8) connects

down (to the closed position).

radiator top tank (2) and surge tank (9). The cross flow