DS 19 OPERATION No. DS 142-3 : Work on the carburettor. Op. DS 142-3 104
PARTICULAR POINTS
44 Adjust the closing of the throttle valve of the 1st body on the Zenith 24/30 EEAC carburettor: unscrew the stop screw until the throttle valve
is totally closed, bring the screw into contact with the stop then screw up three quarters of a turn exactly and lock the locknut.
TOOLS
OVERHAULING A WEBER 24/30 DCZCI or 24/30 DCLC CARBURETTOR
Dismantling (see Pl. 26).
1 To remove the cover (21) complete.
a) Unscrew the fixing screws (22) and raise the cover vertically in order to disengage the floats (23).
b) Remove the paper joint.
c) Remove the floats (23) by withdrawing the pin (24).
d) Remove the needle valve (25) and unscrew the needle valve seat (26). In cases of defect, replace the assembly. 10 mm box spanner
e) Remove the cover (27) from the filter, disengage the joint (28), disengage the filter gauze (29) . . . . . . . . . . . . 10 mm box spanner
f) Clean the parts, blow through the channels with compressed air.
2 Remove the accelerator pump (30) by drawing out the connecting rod (31).
3 Remove the main jets (32 and 35) and the volume screw (3) with its spring (37).
Remove the emulsion tubes (38) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 mm box spanner
4 Remove the pump delivery valve (39). Be careful not to mislay the joints (40), also that of the pump jet (41) . . . 8 mm box spanner
5 Remove the starter jet (42) and the corrector (43) (24/30 DCLC). Remove the pump inlet valve (44) . . . . . . . . . 12 mm box spanner
6 Remove the complete choke control (45).
7 Remove the primary and secondary venturi sleeves (46 and 47). To do this remove the screw (48).
NOTE – It is imperative that the disassembly of the carburettor should be limited to the operations described
above otherwise it may be made unusable. It is important that in no event should the adjustment of the stop
screw (49) of the throttle valve in the first body be disturbed, the adjustment is carried out by
Messrs Weber and is particular to each carburettor.
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