Cooling System; Cooling System - Check; Cooling System - Inspect - Perkins 1204F-E44TA Systems Operation Testing And Adjusting

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Cooling System

Cooling System

Cooling System - Check

Engine And Cooling System Heat
Problems
1. The following conditions indicate that a heat
problem exists.
a. Hot coolant is released through the pressure
cap during the normal operation of the engine.
Hot coolant can also be released when the
engine is stopped.
b. Hot coolant is released from the coolant system
but not through the pressure cap during normal
operation of the engine. Hot coolant can also be
released when the engine is stopped.
c. Coolant must be added frequently to the cooling
system. The coolant is not released through the
pressure cap or through an outside leak.
2. If any of the conditions in Step 1 exist, perform the
following procedures:
a. Run the engine at medium idle, which is
approximately 1200 rpm, for 3 minutes after the
high idle shuts off. Running the engine at
medium idle will allow the engine to cool before
the engine is stopped.
b. Inspect the poly v-belt for contamination, wear,
or damage as this may affect the fan speed
hence the efficiency of the cooling system. If
necessary, replace the poly v-belt. Refer to
Disassembly and Assembly Manual, "Alternator
Belt - Remove and Install" for the correct
procedure.
3. Refer to "Visual Inspection Of The Cooling
System" in order to determine if a leak exists in the
cooling system.
a. Refer to "Testing The Radiator And Cooling
System For Leaks" procedures.
4. If the coolant does not flow through the radiator
and through other components of the cooling
system, perform the following procedures.
This document has been printed from SPI2. NOT FOR RESALE
a. Perform the "Testing The Water Temperature
Regulator " procedures.
b. Clean the radiator and other components with
hot water or steam at low pressure. Detergent in
the water may also be used. Compressed air
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may be used to remove materials from the
cooling system. Identify the cause of the
restriction before you choose the method for
cleaning.
c. Straighten any fins of the radiator if the fins are
bent.
5. Check the high idle of the engine. The engine may
overheat if the high idle rpm is set too high.

Cooling System - Inspect

This engine has a pressure type cooling system. A
pressure type cooling system gives two advantages:
• The pressure type cooling system can operate
safely at a higher temperature than the boiling
point of water at different atmospheric pressure
ranges.
• The pressure type cooling system prevents
cavitation in the water pump.
Cavitation is the sudden generation of low pressure
bubbles in liquids by mechanical forces. The
generation of an air or steam pocket is much more
difficult in a pressure type cooling system.
Regular inspections of the cooling system should be
made in order to identify problems before damage
can occur. Visually inspect the cooling system before
tests are made with the test equipment.
Visual Inspection Of The Cooling
System
1. Check the coolant level in the cooling system.
2. Look for leaks in the system.
Note: A small amount of coolant leakage across the
surface of the water pump seals is normal. This
leakage is required in order to provide lubrication for
this type of seal. A hole is provided in the water pump
housing in order to allow this coolant/seal lubricant to
drain from the pump housing. Intermittent leakage of
small amounts of coolant from this hole is not an
indication of water pump seal failure.
3. Inspect the radiator for bent fins and other
restriction to the flow of air through the radiator.
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