TM 5-3810-300-24&P-3
Fuel Manifold 2.4
3. Lubricate the threads of the fuel connectors equipped with
a nylon insert. Start the connectors into the tapped holes
(inset in Fig. 2). Then centralize the tee connectors with the
fuel connectors by alternately turning the connectors while
moving the manifold in arid out slightly. Centering the tee
connectors is important and necessary to ensure leakproof
joints. If a lock nut is used with the connector, install the nut
with the fibre end down. If the nut is staked, a new copper
sealing washer must also be used.
4. Tighten all of the fuel connectors (and lock nuts, if used)
uniformly to 30-35 lb-ft torque.
5. Install the special restricted fitting at the end of the fuel
outlet manifold. The fitting is identified by a letter "R" stamped
on its surface. If the fitting is replaced for any reason, be sure
Fig. 4 External Type Fuel Manifold Details and Relative
the replacement part has the same size orifice as the one
Location of Parts
removed. It is very important that the correct size fitting be
installed to maintain the proper fuel pressure and an adequate
4. Remove the fuel connectors from the cylinder head.
flow of fuel within the system.
5. Withdraw the fuel manifolds carefully.
6. Attach the fuel oil pipes to the fuel connectors and the fuel
injectors. Be sure the flared ends of the fuel pipes are
Inspection
properly seated before tightening the connections. Use socket
J 8932-01 and a torque wrench to tighten the connections to
Since the former external fuel manifolds are positioned and
12-15 Ib-ft torque.
locked in place by the fuel connectors, be sure the tapered
seats in the manifold tee connectors and the tapered ends of
CAUTION: Do not bend the fuel pipes and
the fuel connectors are clean and free of score marks. If
do not exceed the specified torque.
scored surfaces cannot be cleaned up, replace the parts.
Excessive tightening can twist or fracture the
flared ends of the fuel pipes and result in
Install Former External-Type Fuel Manifolds
fuel leaks. Lubricating oil diluted by fuel oil
can cause serious damage to the engine
Refer to Figs. 2 and 4 and note that the tee connectors on the
manifolds are on the top side of the lower manifold and on the
bottom side of the upper manifold. The upper and lower
7. Connect the fuel lines to the fuel manifolds.
manifolds are not interchangeable. Install the manifolds as
follows:
8. Start the engine and check all of the fuel connections for
leaks. Lubricating oil diluted with fuel oil can cause serious
1.
Clean out the cylinder head openings for the fuel
damage to the engine bearings.
connectors and fuel manifold fittings.
NOTE:
Any leakage between the fuel
2. Guide the tee connectors of the manifolds into the
connectors and the tapered 'seats of the
openings in the side of the cylinder head so that the tapered
manifold tee connectors would be observed
seats are in approximate alignment with the fuel connector
at the side of the cylinder head.
openings in the top of the cylinder head.
9. Install the valve rocker cover, using a new gasket.
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