DS 19 OPERATION No. DS 142-4 : Work on the carburettor controls. Op. DS 142-4 113
TOOLS
REPLACEMENT OF THE ACCELERATED IDLING CONTROL SEALS ( cars pr oduced bef or e M ar ch 1959) .
Dismantling.
25 Remove the coils and bracket assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 mm spanner
26 Disconnect the low pressure pipe assembly from the hydraulic gear selector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 or 10 mm spanner
27 Disengage the return spring engagement plate.
Disengage the dust cover from the body of the control. Remove the cap. During the unscrewing, hold the
support with a flat spanner.
Remove the seal from the cap. Remove the piston from the cap and remove the ring seal from the piston . . . . 28 mm spanner
24 mm spanner or
24 mm angled ring
spanner
NOTE – It is preferable to fit a new type of accelerated idling control.
28 Clean the parts with alcohol only. Do not use trichlorethylene.
Assembly.
29 Fit the seal, previously smeared with fluid on the piston.
NOTE – In the case where slight scratches are found on the piston, a light rubbing with No. 600 abrasive paper
smeared with alcohol is permitted. Clean and blow with compressed air.
Engage the piston in the bore of the cap.
Fit the ring seal on the cap. Fit the assembly in the body of the control. Tighten the cap (hold the support with
a flat spanner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 mm spanner
24 mm spanner or
24 mm angled ring
spanner
30 Connect the low pressure pipe assembly to the hydraulic gear selector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 or 10 mm spanner
31 Offer up the coils and bracket assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 mm spanner
32 Bleed the control (see Op. DS 453-0). Put the control under pressure by pressing on the brake pedal; maintain this
pressure for a few moments and check for leakage from the control.
33 Put the control lever in its normal position and put the dust cover in position on the body and on the collar of the
control lever. Refit the attachment plate and return spring.
34 Adjust the slow running (see Op. DS 142-0).
REPLACEMENT OF THE ACCELERATED IDLING CONTROL SEALS (cars produced since March 1959).
35 In order to carry out this operation, it is preferable to remove the control assembly (see this operation. Paragraphs
11 to 16) and proceed as for overhauling (see Op. DS 142-6).
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