Scribd
Upload
79 views2 pages

Bleeding

The document provides instructions for bleeding air from a fuel circuit. It describes opening the fuel tank and engine covers, filling and replacing the fuel filter if needed, cranking the engine while bleeding the air bleed valve to remove air from the circuit, and running the engine at low idle to stabilize it once started if air remains.

Uploaded by

marsh2002
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
79 views2 pages

Bleeding

The document provides instructions for bleeding air from a fuel circuit. It describes opening the fuel tank and engine covers, filling and replacing the fuel filter if needed, cranking the engine while bleeding the air bleed valve to remove air from the circuit, and running the engine at low idle to stabilize it once started if air remains.

Uploaded by

marsh2002
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
You are on page 1/ 2

TESTING AND ADJUSTING BLEEDING AIR FROM FUEL CIRCUIT

BLEEDING AIR FROM FUEL CIRCUIT

a If the engine does not start or is difficult to start a Add fuel from the inlet port a (8 places). Por-
after the following operations or conditions, tion b is the outlet port after filtering (clean
bleed the air from the fuel circuit as follows. side), so never add fuel from portion b.
• When starting the engine for the first time
• After cleaning the fuel tank
• After adding fuel when the engine has stalled
• After replacing the fuel filter (only when the
air is not bled easily)

1. Open the stop valve at the fuel tank supply side,


then open the engine right side cover.
a Check that there is ample fuel in the fuel
tank.

2. Remove fuel filter, fill it with fuel, then install it


again.
a Carry out this operation only if the fuel filter
has been replaced.
a If the fuel filter is not to be replaced, there is
danger of dirt getting in, so do not remove
the fuel filter.

20-126 D375A-5
TESTING AND ADJUSTING BLEEDING AIR FROM FUEL CIRCUIT

3. Crank the engine with the starting motor, push


air bleed the valve (1), and bleed the air from the
vent circuit.
a There is no problem with starting even if
some air is in the circuit, so if the fuel flows
out the bleeding operation is completed.
4. Start the engine and run at low idle.
a The injector is an open circuit, so while the
engine is running the air remaining in the cir-
cuit is released from the injector to the inside
of the engine or the fuel tank.
a After the engine is started, the engine rota-
tion will be slightly unstable until the air re-
maining in the circuit is completely bled, so
continue to run the engine at low idle until it
stabilizes.

a If the engine will still not start after the above op-
eration, fill the fuel pump with fuel as follows.
1) Remove air bleed valve (1).
2) Fill with clean fuel through the hole in the
valve until it overflows.
a Amount of fuel to add: Approx. 30 cc (ref-
erence)
3) Install air bleed plug (1).
3 Air bleed plug: 12.7 Nm {1.3 kgm}
4) Crank the engine with the starting motor.

D375A-5 20-127
(3)

You might also like