Illustration 27 149-2955 Seal Protector

TM 9-2320-312-24-2

Truck Engine

Disassembly and Assembly Section

Note: Proper installation of the injector is very

important. Damage to the upper high pressure seals

can cause excessive oil leakage under the valve

cover. This may cause the engine not to start due

to a low actuation pressure. Damage to the lower

high pressure seals may allow high pressure oil to

leak into the fuel supply passage. This will result in

excessive oil consumption.

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Illustration 27

(A) 149-2955 Seal Protector

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Illustration 29

(X) 8T-2396 Bolts.

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Illustration 28

(Y) 159-0288 Deflector.

(B) 149-2956 Seal Installer

Note: Some of these engines were built without the

159-0288 Deflector. During the installation of the

NOTICE

unit injectors, the deflectors should be installed. Six

The correct procedures and tooling specifications

159-0288 Deflectors and six 8T-2396 Bolts are

must always be used. Failure to follow any of the

required for each engine. These new deflectors and

procedures may result in damage, malfunction, or

bolts replace the former 6V-8653 Bolts.

possible engine failure.

Note: Install the upper seal pack first. Then install

the middle seal pack. Finally, install the bottom

O-Ring Seal.

3. Both the 149-2955 Seal Protector (A) and the

149-2956 Seal Installer (B) should be used

when you are installing the upper high pressure

seals.

Note: New seals should be installed after each

removal of the injector from the engine.

4. Lubricate the O-Ring seals and the sleeve bore

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Illustration 30

of the injector sparingly with clean engine oil.