Section III. ENGINE AIR INTAKE SYSTEMS

TM 5-3835-222-BD

Damage Detected When Operating

c. Observe Operation

Or System Not Working:

-Internal Engine Failures . . . . . . . . . Go To Section II

-Cooling System Failures . . . . . . . . Go To Chapter 6

-Lubrication System Failures . . . . Go To Section V

NOTE:

Procedures boxed in this index can be used for training purposes.

4-3. Repair Procedure Index.

Paragraph

Engine Interchangeability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-5

Engine Air Intake For Normally Aspirated Engines . . . . . . . . . . . . . . . . . . . . . . . .

4-6

Engine Air Intake For Turbocharged Engines . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-7

Engine Air Intake For Supercharged or Turbosupercharged Engines . . . . . .

4-8

Blower Drive Shaft Broken . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-9

Air Cleaner Clogged . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-10

Air Cleaner Damaged/Leaking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-11

Intake Manifold Or Other Castings Or Containers Damaged . . . . . . . . . . . . . .

4-12

Exhaust Manifolds Damaged . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-14

Lubrication System Pump Failure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-16

Oil Level Low . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-17

Section II. ENGINE FAILURE

4-4. General. Basic engines on certain vehicles are identical to equipment engines. Motor supports,

manifolds, exhaust or cooling systems may require different brackets to interchange. Accessories and

brackets must be swapped from the unserviceable equipment or vehicle to make the replacement

engine fit another application.

4-5. Engine Interchangeability. Availability of engines may become restricted to those found on

damaged equipment. Military Standard engines from other equipment can be modified to fit military

standard equipment sets requiring another engine. Commercial equipment sets engines cannot be

be exchanged unless the equipment is absolutely identical.

NOTE

There are several engine procedures which vary depending on the

equipment being repaired; therefore, the operator should refer to the

specific TM for detailed instructions.

Section III. ENGINE AIR INTAKE SYSTEMS

4-6. Engine Air Intake For Normally Aspirated Engines. Normally aspirated engines require that

the first cycle piston movement is downward to create a vacuum drawing air into the intake system.

The key to avoiding damage to this type of system is to prevent drawing unfiltered air into the engine.

Repairs to this system should always be done with materials that do not block the air flow and are

securely attached to prevent them being sucked into the engine intake manifold cylinder.

4-2