Fuel injector tube

TM 10-3930-634-34

(36) so they can be installed in the same position and

removal tool in the injector tube; then thread the pilot

remove the valves.

into the end of removal tool, and remove the injector

NOTE

tube as illustrated in figure 3-71.

Further disassembly of the cylinder head

(7) Exhaust valve guides. Support the cylinder

should only be done if inspection requires re-

head, bottom side up, on wooden blocks which are at

placement of valve guides, injector tubes,

least 3 inches thick. Remove the exhaust valve guide

valve seats, water nozzles, etc. If water jacket

as illustrated in figure 3-72.

is to be pressure tested, the injector tubes

(8) Exhaust valve seat insert. Place the cylinder

must not be removed.

head on its side and remove the exhaust valve seat in-

(6) Fuel injector tube. Place the injector tube

sert as illustrated in figure 3-73.

(9) Disassemble the cylinder head in numerical se-

quence illustrated in figure 3-74.

d. Cleaning and Inspection.

(1) Cleaning.

(a) Steam clean the cylinder head after all parts

have been removed.

(b) Immerse the cylinder head in solvent or fuel

oil then using a soft bristled brush remove all of the

rust proofing compound especially from the integral

(c) Dry the cylinder head using compressed air

to remove all solvent.

(2) Leak Test.

(a) Prepare the cylinder head for leak test by

sealing all water holes in the head with steel plates and

rubber gaskets as illustrated in figure 3-75.

(b) Install dummy or scrap injectors and tighten

injector clamp bolts to 20-25 lb-ft. torque.

for an air hose connection as illustrated in figure 3-75

and apply 80 to 100 psi air pressure.

(d) Immerse the head in a tank of water previ-

ously heated to 180 to 200 F. for twenty minutes.

3-53