TM 5-3810-300-24&P2
debris that could restrict air flow. Repair screen or replace cap if any large holes are found in screen.
2. Check all mounting hardware for security to eliminate possible vibration of intake piping. Such vibration leads to early
failure of hoses, clamps, and mounting parts, and can cause hoses to slip off the connecting pipes, allowing
unfiltered air into the engine air intake.
3. Check hoses for cracks, chafing or deterioration, and replace at the first sign of probable failure.
TROUBLESHOOTING.
Dust passing the air cleaner, even through small holes, can cause rapid engine wear. Make sure all connections
between the air cleaner and the engine are tight and seal positively. If these connections are all well sealed, and there is
still evidence of dust leakage, check the following places for possible trouble.
NOTE
DUST THAT GETS BY THE AIR CLEANER SYSTEM CAN OFTEN BE DETECTED BY LOOKING
FOR DUST STREAKS IN THE AIR TRANSFER TUBING OR JUST INSIDE THE INTAKE MANIFOLD
INLET.
1.
Inspect air cleaner outlet tube for damage.
2.
Make sure the element gasket washer is not damaged, and that the washer's rubber face seals against the element.
3.
Inspect the element gasket for damage.
4.
Inspect the restriction tap for leaks.
6.
Check for structural failures. Any damaged parts must be replaced.
Check air cleaner restriction by connecting a vacuum gage or water manometer to the restriction indicator tap on the air
cleaner outlet pipe. This restriction should be measured with the engine running at high idle. If the initial restriction (with
new or clean elements) measures higher than 19 inches of water, check the following items:
1.
Make sure the air cleaner inlet is not plugged.
2.
Check the safety element to be sure it is not plugged.
3.
Inspect the air cleaner outlet to be sure it is not plugged.
4.
Make sure the correct size connections are used between the air cleaner and 5. Make sure that all inlet accessories
are the correct size, and are not plugged by any foreign object.
COOLING SYSTEM. (Illus. 4-7).
The following paragraphs point out several facts about Cooling System Components, the affects of Cooling System
neglect, and procedures to be followed for Cooling System maintenance.
Rust Prevention.
To keep engines operating to new truck efficiency, all forms of rust formation must be prevented. The formation of rust
in the cooling system is a result of water, iron, and oxygen and can only be prevented by maintaining full strength
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