Page 555 - Workshop Manual - Aumark (BJ1051)

11-1
Fuel-Fuel system

Fuel system

Precautions

1. Before checking and servicing the fuel system, disconnect battery negative cable.
2. Fuels are combustible materials. When you operate on the fuel system, cigarettes, open
flames, indicator lights, arc equipment, and switches must be kept away from the work area
where should be equipped with ventilation facilities so as to avoid personal injury even
death.
3. The high-pressure fuel line and fuel rail of the fuel pump contain high pressure fuel. In order
to avoid personal injury, never loosen any fuel pipe joint when the engine is running.
4. Keep fuel away from rubber or leather components.
5. Diesel injection equipment is manufactured in accordance with very accurate tolerances and
clearances, so it is very important to have an absolutely clean working environment when 11
you operate on the fuel system. All openings must be sealed with special plug caps.
6. Residual oil pressure in the fuel system will still persist for a long time after your car is shut
down. Before servicing the fuel system, you must release fuel pressure first. Failure to
comply with these tips may result in personal injury.
7. Before disconnecting any fuel system line, you should check and make sure there is no dirt
or foreign substances around the fuel pipe joint. If any, clean it up. Dirt or foreign
substances may damage the fuel system or engine.
8. Do not allow cleanser to enter any fuel pipe joint; otherwise the fuel system may be
damaged.
9. Do not bend or twist any fuel pipe in the fuel system hard.
10. Before connecting fuel system lines, make sure no fuel pipe joints are damaged. If any is
found damaged or cracked, replace the fuel pipe assembly. Ensure that connecting surfaces
of fuel pipes are free of dirt.
Releasing fuel system pressure
(a) Disconnect connection harness connector of fuel pump.
(b) Start the engine and remain idle until engine shutdown.
(c) Restart the engine and wait approx. 5 seconds to make sure the pressure in fuel injection
supply manifold has been completely released.
(d) Connect fuel pump harness connector.
Fuel tank drainage
(a) Disconnect battery negative cable.
(b) Screw off fuel tank cap.
(c) Use an appropriate fuel tank drainage facility to drain the fuel tank.

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