Figure 5-11. Removing injector control shaft and fuel lines.

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Cylinder Head

TM-55-1925-204-12 TUG Harbor Diesel 1200 H. P. Steel 100 Ft Design 3006 Flight One FSN 1925-375-3003 Manual

Figure 5-12. Rocker arms and push rods.

TM 55-1925-204-12

Figure 5-11. Removing injector control shaft and fuel lines.

(i) Remove fuel lines from injector and

CAUTION

manifold.

(j) Tag and disconnect electrical leads

Do not set the cylinder head down with

from the instruments, and lines from pressure gages, then

bottom flat on bench or floor. The cam

remove the instrument panel. Remove the throttle control rod.

followers and injectors project below the

(k) Loosen (three or four turns) the two

bottom surface of the head, and would be

bolts directly below each lifter bracket. These bolts attach the

damaged. Use blocks for support.

balance weight cover to the front end plate, and the flywheel

housing to the rear end plate. They could interfere with

cylinder head being lifted off the block.

area for further maintenance. Remove cylinder head gaskets,

(l) Remove the two capscrews securing

and oil and water seals.

the front lifter bracket to the balance weight cover. Also

c. Disassembly.

remove the two capscrews securing rear lifter bracket to

(1) Fuel injectors. Remove the fuel injectors by

flywheel housing.

removing nut from the injector clamp, then use the injector

(m) Remove the two capscrews securing

removing tool (table 4-1) to lift the injector from the cylinder

the heat exchanger vent casting to the balance weight cover,

head.

and the two capscrews securing vent casting to the heat

(a) Remove fuel line connectors.

exchanger expansion tank, then, remove casting and gasket.

(b) Remove the studs that secures the

(2) Cylinder head.

valve rocker cover to cylinder head.

(a)

Remove the 10 nuts from studs

securing cylinder head to the block.

brackets.

(b) Insert lifting hooks into eyes of front

(d) Remove all external fuel oil line fittings.

and rear lifter brackets; then, raise the cylinder head slowly

(2) Rocker arms and valves. Remove bolts (fig.

and uniformly off the studs to avoid stud thread damage.

5-12) from brackets, then withdraw shaft from the rocker

arms. Backoff locknuts, unscrew rocker arm clevis from the

push rods, then remove the rocker arms.

5-15