TM 5-3805-260-24
COOLING SYSTEM
COOLING SYSTEM WITH STANDARD VERTICAL RADIATOR
1. Radiator cap. 2. Radiator top tank. 3. Radiator top hose. 4. Shunt line. 5. Housing for water
temperature regulators. 6 Coolant 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. 011 cooler. 16. Inlet line for oil cooler. 17. Cylinder
block. A. Orifices between cylinder heads and front cover. B. Orifice in oil cooler inlet.
Water pump (13) is installed on the front face of
the front cover for the engine and is driven by V belts
from the crankshaft pulley. The inlet opening of water
pump (13) is connected to radiator bottom hose (12).
The outlet flow of coolant from water pump (13) goes
through inside passages in the front cover for the engine.
As the coolant goes from the water pump, it
divides and goes through the inside passages in the front
cover for the engine to cylinder block (17). Most of the
coolant goes through cylinder block (17) and up to
cylinder heads (7). From cylinder heads (7) the coolant
goes forward through orifices (A) to the front cover for
the engine.
Part of the coolant going to the left side (as seen
from the flywheel) of cylinder block (17) goes through
orifice (B) to inlet line (16) and on to oil cooler (15), to
cool the oil for lubrication of the engine, and back to the
front cover for the engine through outlet line (14).
From the front cover for the engine, the coolant
either goes to the inlet for water pump (13) or to the
radiator. If the coolant is cold (cool), the water tempera-
ture regulators (18) will be closed. The coolant will go
through inside bypass (10) to water pump
(13). If the coolant is warm, the water temperature
regulators
(18)
will
be
open.
When
the
water
temperature regulators (18) are open, they make a
restriction in the inside bypass (10) and the coolant goes
through radiator top hose (3) and into radiator top tank
(2). Coolant then goes through the core of the radiator to
the radiator bottom tank (11) where it is again sent
through the cool-
FLOW OF COOLANT
3. Radiator top hoses. 5. Housing ( water
temperature regulators). 6. Coolant to
housing for water regulators. 10. Inside
bypass. 18. Water temperature regulators
(two). C. Flow with warm coolant. D. Flow
with cold coolant.
2-16
