DS 19 OPERATION No. DS 314-0 : Checking and adjustments on the clutch control. Op. DS 314-0 173
TOOLS
25 Accelerator control with 1 rod (see Pl. 46, fig. 2).
Stop the engine, press the accelerator pedal right down. The hook of the spring should be fitted without strain
or without clearance on the pin (6) with the pin resting at the lower part of the slot “a”. If necessary, adjust the
length of the spring by moving its end in the trunnion (7). Make sure that the spring does not touch the nut (8).
26 New clutch re-engagement control spring (since December 1956, see Pl. 47).
This spring has a diameter of 15.5 to 16.1 mm (for identification).
The earlier spring has a diameter of 13.2 mm. The new spring can be fitted in place of the old spring, if the
adjustments given below are carried out.
With the pin (18) resting on the lower part of the slot “a”, hook the spring (19) on the pin.
Engage the end of the spring in the hold “b” of the trunnion, the screw (20) being sufficiently unscrewed to
allow it to slide freely.
With the engine stopped, have the accelerator pedal pressed right down, by an assistant. Push the lever (21) in
the direction “F” until it stops. The hook of the spring should fit without restraint on the pin (18), measure the
distance “l”.
a) Hold the lever (21), pull on the spring so that the end is at a distance of 1 + 6 mm from the trunnion. Tighten
the screw (20).
b) (Cars produced since July 1959) : Pull on the spring in order to increase the distance “1” by 2 mm (1 + 2 mm),
the adjusting screw being in the middle position. Complete the adjustment on the road.
NOTE - It is sometimes necessary to make the adjustments (idling, clutch drag, clutch clearance and clutch
engagement) again after a few dozen miles.
To carry out the clutch engagement adjustment on the road
1. On a level road, change from 1st gear to 2nd gear at 20 m.p.h. (30 km/h) and completely release the
accelerator pedal. Clutch engagement should occur without a jerk.
2. On a level road, running at 56 m. p. h. (90 km/h) in 4th gear, maintain the accelerator pedal in this position
and change to 3rd gear. Clutch engagement should occur without a jerk.
If a jerk occurs, tighten the clutch engagement control spring. If there is delay, lengthen the spring.
CHECKING A NON-RETURN VALVE (see Pl. 76).
27 Disconnect the return pipe union from the low pressure pump (spanner 2220-T, see Pl. 72, fig.4) and insert the
union and pressure gauge assembly (sold under number 2294-T, see Pl. 76), between the low pressure pump Spanner 2220-T or
and the return pipe 14 mm spanner
Union and gauge 2294-T
28 With the engine idling, bleed the hydraulic gear selector. Stop the engine. Check the pressure. It should be between
8 and 14 p.s. i. (0. 600 and 1 kg/cm
2
).
29 The pressure should not drop. If so, the valve is defective. No alteration is possible on this part and it should be
replaced by a part which will comply with the above conditions.
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