DS 19 OPERATION No. DS 334-1 Work on the gear control. Op. DS 334-1 231
TOOLS
REPLACEMENT OF A HYDRAULIC GEAR SELECTOR
Removal (see Pl. 67).
9 Remove the facia board (see paragraph 1, this operation).
10 To release the pressure: unscrew the bleed screw on the pressure control valve (
1
/2 a turn approximately). Put the
manual height control lever in the low position. On early models, without the manual height control, raise the
front of the car with the wheels resting on the ground . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 mm spanner
11 Unscrew the left-hand suspension sphere. Place a cloth under the union in order to avoid spilling the fluid.
12 Disconnect the pressure feed pipe from the pressure distribution block (2nd union (42) from the right) (see Pl. 25). 10 mm spanner
13 Disconnect the union plates from the clutch engagement control and from the hydraulic gear selector. Remove
the pipe assembly from the fixing studs. Remove the seal plates (see Pl. 25) . . . . . . . . . . . . . . . . . . . . . . . . . . 8 or 10 mm spanner
8 or 10 mm box spanner
14 Disconnect the union plate of the gearbox pipe assembly (1) (5 pipes under the hydraulic gear selector) without
bending the pipes. Remove the seal plates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 mm ring spanner
12 flats
length = 100 mm
15 Disconnect the rubber pipe (2) feeding the low pressure pump and the low pressure pipe assembly (10) from the
hydraulic gear selector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 or 10 mm box spanner
16 Remove the rubber grommet in the steering tunnel, and through the hole “a”, untighten the screw (3) in the
coupling of the selector lever to the sliding valve of the hydraulic gear selector (hydraulic gear selector side).
Do not untighten the screw (4) in order to avoid moving the flange (5).
17 Disengage the speedometer cable from the steel plate on the hydraulic gear selector. On early models, it is
necessary to disconnect the plate from the hydraulic gear selector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 mm box spanner
18 Untighten the fixing screw (6) from the auxiliary clutch control rod.
19 Remove the nuts (7) from the studs fixing the hydraulic gear selector to the selector lever assembly
(spanner 2431-T, see Pl. 72, fig. 1).
Disengage the hydraulic gear selector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Spanner 2431-T
Assembly (see Pl. 67).
20 Put the sliding valve in the 1st speed position. To do this
Pull and turn the sliding valve (11) until the hole in the sliding valve corresponds with that of the rear cap on the
hydraulic gear selector.
Fit a rod of 3.94 mm diameter in the locating hole (rod 2429-T, see fig. 2). It should penetrate approximately
30 mm; if not, turn the sliding valve half a turn . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Rod 2429-T
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