DS 19 OPERATION No. DS 331-3 : Overhauling a gearbox cover. Op. DS 331-3 220
PARTICULAR POINTS
Assembly.
5 (a) Remove the pistons from the cylinders with compressed air.
(c) It is permissible to lightly clean the pistons with No. 600 abrasive paper moistened with alcohol.
(d) Fit the seals (mandrels MR-3676-120 and 130, see Pl. 64, fig. 4 and 5).
6 Calibrate the fork return springs..
Length 68 mm under a load of 24.5 to 26 kg.
8 To adjust the pipe assembly controlling the gears :
(a) If a pipe assembly is replaced, see Op. DS 334-0.
(b) If the cover is replaced, see Op. DS 33 I-I.
TOOLS
DISMANTLING (see Pl. 55).
1 To remove the cylinders controlling the selector forks :
a) Cars produced before March l957 see fig. 2 and 6).
Remove the fixing clamps (56).
Remove the clips (57) and the adjusting shims (58).
Remove the cylinder and pipe assembly.
Remove the cylinder adjusting shims (59) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 mm box spanner
b) Cars produced since March 1957(see fig. 1).
Remove the cylinder clamp plate (20) (socket 1773-T, see Pl. 64, fig. 6).
Remove the clamp plate adjusting shims (99).
Remove the cylinder and pipe assembly.
Remove the cylinder adjusting shims (59) Socket 1773-T
2 Remove the selector fork fixing screws. Check that all the shafts are in the neutral position . . . . . . . . . . . . . . . 9 mm spanner
3 Remove the cup (60) from the 4th speed selector shaft (61) (spring compressor 1798-T, see Pl. 56, fig. 1).
Slide the shaft towards the front until the front cup (62) is on the small diameter of the shaft, zone “a’. Fit the
spring compressor as shown on Pl. 56, the nose pieces engaged between the two end coils of the spring.
Compress the spring. Remove the cup (62), the shaft (61), the rocker (63), the spring, the selector fork (64)
and its thrust pad.
Carry out the same operation for the other selector shafts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Spring compressor 1793-T
4 Remove the expanding washers (65) and remove the locking plungers (66).
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