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 Note. It is not necessary to remove
d. Installation.
primary and final fuel filters or the
fuel filter housing as shown in figure
(1) Refer to figure 62 and reverse the se-
133 to remove the injection tube as-
quence of instructions A and B to install
semblies.
the crankcase breather adapter, using
new gaskets.
b. Replacement. The fuel injection tube as-
semblies are furnished for replacement ready
(2) Refer to figures 44 and 45 and reverse
for installation. The tube assemblies are pre-
the sequence of instructions to install
formed to fit their respective location in fuel
the crankcase breather tube.
injection pump hydraulic head and fuel injector
nozzle and holder assembly. The tube assem-
blies include two nuts and dust cap.
c. Installation.
a. Removal. Remove fuel injection tube as-
semblies as follows.
(1) Refer to figure 133 and reverse the se-
quence of instructions to install cylinder
(1) Remove cylinder No. 1, 2, and 3 fuel
No. 4, 5, and 6 fuel injection tube as-
injection tube assemblies by following
semblies.
steps C and D, figure 57 and step C,
(2) Refer to figure 57, steps C and D and
(2) Remove cylinder No. 4, 5, and 6 fuel
No. 1, 2, and 3 fuel injection tube as-
injection tube assemblies following in-
semblies.
structions in figure 133.
Section IV. SERVICE OPERATIONS
101. GENERAL
(3) Test cylinder compression on all cyl-
inders as follows. Figure 221. (A) Posi-
This section covers service operations al-
tion a new fuel injector nozzle to head
located to third echelon maintenance personnel.
gasket on end of adapter- 10899183 and
install the adapter into the injector noz-
zle opening. Secure the adapter to cyl-
inder head using two 5/16 x 2- 1/2 cap
a. General. Check cylinder compression
screws and 5/16- inch lock washers pro-
when the is at operating temperature. Re-
vided for securing the nozzle and holder
move the six fuel injector nozzle and holder
assembly clamp. Apply a light coating
assemblies and test all cylinders. When trouble-
of grease on the gasket to prevent gas-
shooting (par. 49) indicates a compression test
ket from falling off adapter as it is in-
is required for only one cylinder, check that
stalled in the head. (B) Connect com-
cylinder by removing the fuel injector nozzle
pression tester gage -10899180 and
and' holder assembly.
coupling -10899184 to the adapter -
10899183 and tighten the connection
b. Compression Test.
securely. (C) Crank engine several
seconds at 150 to 180 rpm using the
(1) Refer to TM 9-2320-235-10 for proper
engine starter motor. Observe cylinder
engine starting procedure. Start engine
compression reading on gage. Cylinder
and allow it to warm up to normal
compression should be from 500 to 550
operating temperature and stop engine.
psi at engine cranking speed. (D) De-
press pressure gage vent to release
(2) Remove the six fuel injector nozzle and
pressure to reset gage to zero reading
holder assemblies following instructions
after first test. Release gage vent and
for figures 148 and 149 (par. 83).
repeat test.
143
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