Northern Lights M944T3F, Руководство оператора

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OM944F 5/21
SP-10. 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 cardboard 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 is not
administered immediately.
1. Fuel system air bleeding may be needed when:
a. After fuel has been added to a newly installed
engine.
b. A new fuel filter is installed.
c. The engine has run out of fuel.
d. The fuel lines, injection pump, or any other fuel
system component has been removed and
installed.
2. After changing the fuel filter, air only needs to be
bled from the fuel filter.
a. Loosen the air vent plug
(#1 on Figure 10)
on the
fuel filter by about 1-1/2 turns. (Be sure to cover
the vent with a cloth to prevent fuel from
splashing.)
b. Turn the priming pump cap on the fuel feed pump
counterclockwise to unlatch it. Move the priming
pump plunger
(#2 on Figure 10)
up and down. To
close the pump turn the cap clockwise while
depressing it.
c. Close the air vent plug when no more air bubbles
can be seen in the fuel flowing from the air vent
plug hole.
Servicing
Figure 13: Fuel Feed Pump
3. To bleed air at the fuel injection pump:
a. Turn the air vent plug
(#3 on Figure 10)
about
1-1/2 turns to loosen it. (Cover the vent with a
cloth to prevent fuel from splashing.)
b. Pump the feed pump cap up and down.
c. When there are no air bubbles to be seen in the
fuel flowing from the air vent plug hole, push
down the priming pump cap and turn it clockwise
to lock it in place.
NOTE:
Do not close the air vent plug before locking the
priming pump cap in place, because the internal
pressure in the pump will prevent the priming
pump cap from returning to the original
position.
4. If the engine does not start after this bleeding
process, loosen a fuel line at the injector while
cranking the engine with the starter motor until pure
fuel escapes. Then tighten the connections. Do each
line one-at-a-time. After the engine has started, use
a piece of cardboard to look for fuel leaks.