Fuel system - Service procedures

Bleeding

Engines without fuel shut-off valve and engines with fuel shut-off valve supplied with voltage during stop

1

Open the bleeding screw (1) on the cover for the fuel filters. Pump up fuel with the manual pump (2) until it is free from air bubbles. Tighten the screw while the fuel flows out.

2

Continue to pump in order to maintain a substantial feed pressure. Further bleeding is not normally required.

If the injection pump needs bleeding, release the connection for the overflow valve (4) at the pump and continue pumping by hand until air-free fuel flows out. Tighten the connection while fuel flows out. Continue to pump so that an adequate feed pressure is obtained. Check that the connection seals well.

NOTE! Do not bleed at the pressure equalizer! Because of the positioning of the pressure equalizer on most engines the sealing washer at the connection to the injection pump can be-come incorrectly positioned after removal, resulting in leakage.

3

Start the engine. If the engine does not start after a short moment, release the pressure pipe at the injectors one or two turns. Set the injection pump’s throttle lever in max. position and turn over the engine with the starter motor until fuel is forced forwards. Tighten the pressure pipe nuts.

Bleeding of the fuel system

1.Bleeding screw

2.Manual pump

3.Pressure equalizer

4.Overflow valve

Bleeding

Engines without fuel shut-off valve and engines with fuel shut-off valve supplied with voltage during operation

Is there “automatic stop in case of too low oil pressure” with Volvo Penta’s type of oil pressure switch mounted? When the engine is stopped this switch is closed (“NC” = Normally Closed).The switch is placed on the right-hand side of the cylinder block. It is used on Genset and Stationary engines.

Release the contact unit at the oil pressure switch.

SB = black

BL-W = blue-white

Is the engine fitted with Volvo Penta’s instrument box (Genset or Stationary engine series)?

Is there “automatic stop in case of too low oil pressure” with foreign oil pressure switch which is open when the engine is stopped? (“NO” = Normally Open)

Short-circuit the oil pressue switch’s contact device with a jumper.

1.If there is a coolant level alarm – check the level. When the level is too low the level alarm stops the engine.

2.Press the start button (green) briefly . The instrument is now activated and the charging lamp lights. If there is a coolant level alarm: Press the interlock button (black) for approx. 4 seconds.

3.Vent the fuel system as per standard procedure.

4.Press the stop button (red).

5.Reset the contact device.

6.The engine is now in operational condition.

Short-circuit the oil pressue switch’s contact device with a jumper. Volvo Penta’s key switch or foreign key switch

1.Turn the key switch to operating position/ignition.

On Volvo Penta’s key switch position 1 (15+).

2.The solenoid valve is now activated for operation (not stop position).

3.Vent the fuel system as per standard procedure.

4.The engine is now is operational condition.