TM 5-3895-359-14&P
REFINISHING INJECTOR FOLLOWER FACE
When refinishing the face of an injector follower, it is
extremely important that the distance between the
follower face and the plunger slot is not less than 1.645"
minimum as shown in Fig. 5. If this distance is less
than specified, the height of the injector follower in
relation to the injector body will be altered and proper
injector timing cannot be realized.
Fig. 5 Injector Follower
FUEL LINES
Flexible fuel lines are used to facilitate connection of
When installing fuel lines, it is recommended that
lines leading to and from the fuel tank, and to minimize
connections be tightened only sufficiently to prevent
the effects of any vibration in the installation.
leakage of fuel; thus flared ends of the fuel lines will not
become twisted or fractured because of excessive
Be sure a restricted fitting of the proper size is used to
tightening. After all fuel lines are installed, run the
connect the fuel return line to the fuel return manifold.
engine long enough to determine whether or not all
Do not use restricted fittings anywhere else in the fuel
connections are sufficiently tight. If any leaks occur,
system.
tighten the connections only enough to stop the leak.
Also check the filter cover bolts for tightness..
LOCATING AIR LEAKS IN FUEL LINES
Air drawn into the fuel system may result in uneven
suction line connected to the short fuel return line in the
running of the engine, stalling when idling, or a loss of
fuel tank which would cause the pump to draw air.
power. Poor engine operation is particularly noticeable
at the lower engine speeds. An opening in the fuel
Presence of an air leak may be detected by observing
suction lines may be too small for fuel to pass through
the fuel filter contents after the filter is bled and the
engine is operated for 15 to 20 minutes at a fairly high
but may allow appreciable quantities of air to enter.
speed. No leak is indicated if the filter shell is full when
loosened from its cover. If the filter shell is only partly
Check for loose or faulty connections. Also check for
full, an air leak is indicated.
improper fuel line connections such as a fuel pump
10-3-55
