DS 19 OPERATION No. DS 314-0 : Checking and adjustments on the clutch control. Op. DS 314-0 168
Adjust the clutch clearance.
Pre-adjustment.
21 This adjustment should be carried out with the engine stopped, and the hydraulic system under pressure. Move the clutch fork towards the
rear, have the starting handle turned by an assistant.
22 Start the engine. By pressing on the starting handle extension, it should be driven back.
Move the clutch fork towards the front (by fractions of turns on the adjusting nuts). The pre-adjustment is obtained when, by pressing on the
starting handle extension, it turns some degrees and stabilises itself, without being driven back.
Adjustment.
23 Unscrew the front adjusting nut of the fork one to two turns, to obtain a clearance of I to 2 mm, then tighten the rear nut and the locknut.
Adjustment of the clutch engagement control.
Accelerator control with 2 rods (until March 1956).
24 With the engine stopped, press the accelerator pedal right down, clearance “d” of I to 2 mm between the pin and the hook of the spring, with
the pin resting at the lower part of the slot.
If not, adjust the length of the spring by moving its end in the trunnion (see Pl. 46).
Accelerator control with 1 rod.
25 a) (Until December 1956) (Spring outside diameter 13. 2 mm).
With the engine stopped press the accelerator pedal right down, the hook of the spring should be without tension or without clearance on the
pin with the pin resting on the lower part of the slot. If necessary, adjust the length of the spring by moving its end in the trunnion.
b) (Since December 1956) (Spring outside diameter 15. 5 to 16. 1 mm).
This spring can be fitted in place of the old spring. Proceed as follows:—
Hook the spring on the pin, the pin being in the lower part of the slot, the other end engaged in the trunnion.
Press the accelerator pedal right down, push the lever until it stops (towards the engine) the hook of the spring resting on the pin.
Measure the distance “1” from the trunnion to the end of the spring, pull on the spring so that the end is at a distance “l” + 6 mm from the
trunnion and tighten the screw of the trunnion (see Pl. 47).
c) (Since July 1959) (Spring with adjusting screw).
Proceed as indicated in line (b) above, pull on the spring in order to increase the distance “l” by 2 mm, the adjusting screw being in the
middle position.
Complete the adjustment on the road.
Checking the adjustments (on the road).
Change from 1st gear to 2nd gear at 20 m.p.h. and release the accelerator pedal. Clutch engagement should occur without delay and without
jerk.
Running in 4th gear at 56 m.p.h., maintain the accelerator pedal in this position and change to 3rd gear. Clutch engagement should occur
without delay or without a jerk.
Check a non-return valve and low pressure system (see Pl. 76).
27 Insert the union and pressure gauge assembly (2294-T) in the return of the low-pressure pump.
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
I kg/cm
2
).
29 Stop the engine, the pressure should not drop.
No alteration is possible on this part.
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