Fuel pipe connection fittings

Before doing any work on components of the fuel supply system, in order to prevent any dangerous leaks, proceed as follows:

• Disconnect the fuel pump supply relay (1).

• Run the engine until it stops.

FUEL PIPE CONNECTION FITTINGS

Cleaning for disconnection

Preferably use one of the following systems described in order of effectiveness.

1. a) Jet of warm water (max. 50°C) on the fitting and drying with jets of compressed air to prevent residual water in the interstices getting into the pipe after disconnection.
2. b) Jet of cold water and drying with compressed air.
3. c) Jet of hot water with neutral soap.
4. d) Jet of cold water with neutral soap.

Never use solvents and/or materials that are not compatible with the pipes in general and, for the fitting in particular, not compatible with nylon and acetal resin.

Disconnection operations

When installed, the fitting tends to act as follows for a certain length of time:

• - pincer "A" grips the tang with its steel teeth; if they are in plastic the teeth might mark the tang slightly without adversely affecting tightness.
• - the seals (O'Rings) "B" tend to stick to the surface of the tang in time whether it is of plastic or metal, as a result of this the coupling seems to be seized and impossible to release by only pressing the fins "E" and pulling the coupling.

Therefore, to disconnect proceed as follows:

• - Turn 1/4 - 1/2 of a turn to right and left several times (at least five) body "C" of the fitting in relation to the tang in order to eliminate friction of the seals on the tang and at the same time push the fitting towards the arrow "D" to loosen the grip of the pincers.
• - Press with the fingers on the release buttons.
• - Pull the fitting to disconnect it.

If disconnecting is still difficult, repeat these operations firstly checking that the pipe fitting is clean and that there is no mud or dirt in the interstices hindering the movement of the release mechanisms.

NOTE: Do not use pliers, screwdrivers, etc.. for disconnecting.

If the coupling has not been tampered with and the above operations are correctly carried out, no tools are necessary.

FUEL DISTRIBUTOR MANIFOLD

This device is die-cast and incorporates the pressure regulator and the injectors fastened on the manifold itself by special catches.

The fuel returns to the tank through a pipe contained inside the manifold connected to the fuel pressure regulator.

1. Fuel distributor manifold
2. Electroinjectors
3. Pressure regulator
4. Excess fuel return pipe

NOTE: Never wash the fuel distributor manifold with aggressive fluids, this operation may only be carried out on the outside using a brush. Otherwise, damage may occur to the seals (O-rings) and to the return circuit plastic piping.