Yanmar 3JH4E - Page 37

Bleeding the Fuel System - 3JH4E
(1)
(2)
(3)
(4)
(5)
(6)
0004554
Figure 5
1 – Fuel Injector
2 – Air Bleed Screw
3 – To Fuel Tank
4 – Fuel Filter
5 – Fuel Injection Pump
6 – Fuel Feed Pump
1. Check the fuel level in the fuel tank.
Refill if necessary.
2. Open the fuel cock of the fuel tank.
3. Loosen the air bleed screw
(Figure 5, (2)) 2 - 3 turns.
4. Push up and down on the priming pump
(Figure 5, (1)) to release air out of the
air bleed screw.
5. Continue pumping until a solid stream
of fuel with no air bubbles begins to
flow.
6. Tighten the air bleed screw.
Note: After engine start-up, the automatic
air-bleeding device works to purge the air in
the fuel system.
Bleeding the Fuel System - 4JH4AE
(1)
(2)
(3)
(4)
(5)
(6)
0004555
Figure 6
1 – Fuel Injector
2 – Fuel Filter
3 – Priming Pump
4 – Air Bleed Screw
5 – Fuel Feed Pump
6 – Fuel Injection Pump
1. Check the fuel level in the fuel tank.
Refill if necessary.
2. Open the fuel cock of the fuel tank.
3. Loosen the air bleed screw
(Figure 6, (4)) 2 - 3 turns.
4. Push up and down on the priming pump
(Figure 6, (3)) to release air out of the
air bleed screw.
5. Continue pumping until a solid stream
of fuel with no air bubbles begins to
flow.
6. Tighten the air bleed screw.
BEFORE YOU OPERATE
JH4 Series Operation Manual 31