Volvo Penta TAMD74A, Operator'S Manual

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48
Maintenance: Fuel system
Fuel filters. Change
Clean the filter bracket and place a receptacle under
the filters.
NOTE! Leave the old filters to a destruction plant.
Standard fuel filters
1. Unscrew the filters.
2. Make sure the new filters are absolutely clean and
that the gaskets are free from faults. Apply a little
oil to the gaskets.
3. Screw on the filters by hand until they make con-
tact with the sealing surface. Then screw a further
half turn, not any more!
4. Bleed the fuel system as described above.
5. Start the engine and check for leaks.
Fuel system. Bleeding
The fuel system must be bled e.g. after changing fuel
filter, if the fuel tank has been run dry and after long
stops. Refer to the next page for bleeding when re-
placing a switchable fuel filter during operation.
1. Place a receptacle under the fuel filter and open
the bleed screw (1) on the filter bracket.
2. Pump fuel using the hand pump (2) until the fuel
running out is free from air bubbles. Tighten the
bleed screw while fuel is running out.
3. Pump another 10–20 times with the bleed screw
closed to attain a good feed pressure.
4. Make sure there are no leaks.
No other bleeding is normally required but if the en-
gine will not start, the injection pump must be bled as
follows:
1. Detach the connection (3) and pump with the hand
pump until the fuel running out is free from air.
2. Tighten the conection while fuel is running out.
3. Pump another 10–20 times to attain a good feed
pressure.