DS 19 OPERATION No. DS 142-3 : Work on the carburettor. Op. DS 142-3 107
TOOLS
21 Remove the plug (22). Remove the filter (21).
22 Remove the plugs (23 and 24) as well as the plug (25).
23 Remove the pump inlet valve (26).
24 Remove the slow running jets (27) and the emulsion tubes (28).
25 Remove the delivery valve (29) from the accelerator pump.
26 Remove the volume screw (30) with its spring.
27 Remove the retaining clip (31) and remove the connecting rod (3).
28 Remove the main jets (35). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Special ZENITH
spanner
29 Clean the parts with petrol and blow with compressed air.
NOTE – Never use metallic wire to unblock the jets. The calibration is carried out with great precision and such
an action may modify their output.
Assembly (see Pl. 27).
30 Put the main jets (35) in position : the jet 35 in the small bore and the jet 46 in the large bore.
31 Put the volume screw (30) with its spring in position and tighten a few turns.
32 Put the delivery valve (29) in position in the accelerator pump.
Insert a joint under the head.
33 Put the emulsion tubes (28) in position together with the slow running jets (27).
34 Put the pump inlet valve (26) in position.
35 Put the plug (25) in position, inserting an aluminium joint.
36 Put the plugs (24 and 23 in position, inserting aluminium joints.
37 Put the filter (21) in position, then the plug (22).
38 Engage the assembly of the needle valve (19), the float (17), then fix with the pin (18).
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