Section II. ENGINE COMPONENTS

TM 5-6115-400-35

Note

(13) Position turbine housing on the center

If tool H is not available to measure

housing with assembly marks aligned.

Apply a light coat of anti-seize compound

shaft stretch, an alternate method

to capscrew threads. Install locking plates

may be used.

After reinstalling

and capscrews. Tighten capscrews to 170

impeller nut and tightening to 18-20

in. lb. torque. Secure locking plate tabs

in.-lb torque, continue to tighten the

against sides of capscrew heads.

nut through an angle of 90°

(14) After completing turbocharger assembly,

spin the impellers by hand.

Caution.

Do not use a standard box wrench to

The rotating assembly must spin freely

with no indication of dragging or binding.

tighten locknut because excessive

side strain may bend the shaft. By

using the sliding T-handle with Tool

Note.

H and applying even turning force to

As a precautionary measure, recheck

both ends of the T-handle, the

shaft radial movement and end play

possibility of bending the shaft is

to ensure they are within specified

eliminated.

limits.

(12) Apply a light coat of Super 300 Permatex

(15) Cover all turbocharger openings to

compound to mating surfaces of the

prevent entrance of foreign material.

center housing and compressor housing.

Remove covers as necessary during

Position

center

housing

the

installation of the turbocharger.

compressor housing with assembly marks

h. Turbocharger Installation. Refer to TM 5-6115-

alined. Assemble these parts with care to

400-12.

keep compound from interior of the

compressor housing. Apply a light coat of

compound to threads of the retaining

capscrews. Install compressor housing

clamps, lockwashers, and capscrews.

Tighten capscrews to 120 in. lb. torque.

Section II. ENGINE COMPONENTS

39. General

(roto-coil type) are provided in each valve assembly to

The engine is a six-cylinder diesel with overhead

effect rotation of the valves. All of the valve seat inserts

valves. The engine components are fully described in

are replaceable. See figure 38.

the applicable paragraphs throughout this section.

b. Removal.

(1) Drain cooling system.

40. Cylinder Heads

(2) Remove or disconnect all components

a. General. There are two cylinder heads, with

and assemblies necessary for access to

each head covering three cylinders. Located in the

the cylinder heads.

cylinder heads, above each cylinder are two intake

(3) Remove fuel return line assembly from

valves and valve guides, one intake valve bridge and

connectors in the valve rocker housings

bridge guide pin, two exhaust valves and valve guides,

and fuel filter head. Cap or plug all fuel

one exhaust valve bridge and bridge guide pin, a fuel

line openings to prevent the entrance of

injection nozzle, fuel injection nozzle sleeve, and two

dirt or dust.

rocker arms. One rocker arm actuates the two intake

(4) Remove valve rocker cover. Disconnect

valves through the intake valve bridge and the other

and remove fuel return manifold and fuel

rocker arm actuates the two exhaust valves through the

injection tubes.

exhaust valve bridge. The valves guides are pressed

into the cylinder heads and hold the valve heads in

accurate alignment with the valve seats. Valve rotators