Air Inlet and Exhaust System -807640138

TM 9-2320-312-24-2

Testing and Adjusting Section

Air Inlet and Exhaust

3. Check for dirt tracks on the clean side of the

engine air cleaner element. If dirt tracks are

System

observed, contaminants are flowing past the

engine air cleaner element and/or the seal for

the engine air cleaner element.

i01854769

Air Inlet and Exhaust System

- Inspect

Hot engine components can cause injury from

burns. Before performing maintenance on the

SMCS Code: 1050-040

engine, allow the engine and the components to

cool.

Air Inlet Restriction

There will be a reduction in the performance of the

engine if there is a restriction in the air inlet system

Making contact with a running engine can cause

or the exhaust system.

burns from hot parts and can cause injury from

rotating parts.

Table 6

Required Tools

When working on an engine that is running, avoid

Part

contact with hot parts and rotating parts.

Part Name

Quantity

Number

1U-5470

Engine Pressure Group

4. Use the differential pressure gauge of the

1U-5470 Engine Pressure Group.

198-4240

Digital Pressure Indicator

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Illustration 53

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Illustration 52

Typical example

1U-5470 Engine Pressure Group

(1)

Turbocharger

(2)

Air inlet piping

Refer to Special Instruction, SEHS8907, "Using

(3)

Test location

the 1U-5470 Engine Pressure Group" for the

(4)

Air cleaner

instructions that are needed to use the 1U-5470

a. Connect the vacuum port of the differential

Engine Pressure Group. Refer to Operation Manual,

pressure gauge to test location (3). Test

NEHS0818, "Using the 198-4240 Pressure

location (3) can be located anywhere along

Indicator Tool Gp" for the instructions that are

air inlet piping (2) after engine air cleaner (4)

needed to use the 198-4240 Pressure Indicator

but before turbocharger (1).

Tool Gp.

b. Leave the pressure port of the differential

1. Inspect the engine air cleaner inlet and ducting

pressure gauge open to the atmosphere.

in order to ensure that the passageway is not

blocked or collapsed.

c. Start the engine. Run the engine in the

no-load condition at high idle.

2. Inspect the engine air cleaner element. Replace

a dirty engine air cleaner element with a clean

d. Record the value.

engine air cleaner element.