Aftercooler Core Leakage

TM 9-2320-312-24-2

Testing and Adjusting Section

Aftercooler Core Leakage

Plugged air cleaner Clean the air cleaner or

replace the air cleaner, as required. Refer to the

Operation and Maintenance Manual, "Engine Air

Cleaner Element - Clean/Replace".

Blockage in the air lines Blockage in the air lines

between the air cleaner and the turbocharger must

be removed.

Aftercooler core leakage Aftercooler core leakage

should be pressure tested. Refer to "Aftercooler

Core Leakage" topic for the testing procedure.

Leakage of the induction system Any leakage from

the pressure side of the induction system should

be repaired.

Inlet manifold leak An inlet manifold leak can be

caused by the following conditions: loose fittings

and plugs, missing fittings and plugs, damaged

fittings and plugs, and leaking inlet manifold gasket.

g00295702

Illustration 60

FT-1984 Aftercooler Testing Group

(1)

Regulator and valve assembly

(2)

Nipple

(3)

Relief valve

(4)

Tee

(5)

Coupler

(6)

Aftercooler

(7)

Dust plug

(8)

Dust plug

(9)

Chain

A low power problem in the engine can be the result

of aftercooler leakage. Aftercooler system leakage

can result in the following problems:

Low power

Low boost pressure

Black smoke

High exhaust temperature

NOTICE

Remove all air leaks from the system to prevent engine

damage. In some operating conditions, the engine can

pull a manifold vacuum for short periods of time. A

leak in the aftercooler or air lines can let dirt and other

foreign material into the engine and cause rapid wear

and/or damage to engine parts.