Northern Lights NL673L, Руководство оператора

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ONL673L 7/13
20
Servicing
Figure 11-B: NL673L Fuel System.
SP10. BLEEDING THE FUEL SYSTEM
CAUTION: Escaping diesel fuel under pressure
can penetrate skin causing serious personal injury.
Before disconnecting lines be sure to relieve all
pressure. Before applying pressure, be sure all
connections are tight and lines, pipes and hoses
aren't damaged. Fuel escaping from a very small
hole can be almost invisible. Use a piece of card-
board or wood, rather than hands, to search for
suspected leaks. If injured by escaping fuel, see a
doctor at once. Serious infection or reaction can
develop if proper medical treatment isn't adminis-
tered immediately.
1. The fuel system is self-bleeding. However, any
system may need manual bleeding when:
a. A new fuel fi lter is installed;
b. The engine has run out of fuel;
c. The fuel lines, injection pump or any other fuel
system component has been removed and installed.
2. Loosen bleed screw “A” (
Figure 11
) on top of the fi lter.
Pump hand primer “B” on fuel lift pump until pure fuel
(no bubbles) escapes from bleed screw “A”. Tighten
bleed screw “A”.
3. Loosen bleed screw “C”. Pump hand primer “B” on
fuel lift pump until pure fuel (no bubbles) escapes from
bleed screw “A”.
4. If the engine does not start after the above bleeding
process, loosen a fuel line at the injector. Crank the
engine until fuel escapes, then tighten the connection.
Do each line
one at a time.
5. After the engine has started, check for fuel leaks.