(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.
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.
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
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
(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.
Remove covers as necessary during
installation of the turbocharger.
h. Turbocharger Installation. Refer to TM 5-6115-
alined. Assemble these parts with care to
keep compound from interior of the
compound to threads of the retaining
Tighten capscrews to 120 in. lb. torque.
Section II. ENGINE COMPONENTS
(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
the applicable paragraphs throughout this section.
(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
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