DS 19 OPERATION No. US 312-3 :, Overhauling a clutch assembly. Op. DS 312-3 165
PARTICULAR POINTS
Dismantling.
1 Mark the position of the clutch driving plate on the toggle carrier plate.
Assembly.
5 Compensate for the loss of thickness of the clutch driving plate, after rectification, by fitting steel washers under the spring equal in thickness
to the amount removed from the driving plate (original thickness 13.0 — 0.3 mm. Do not reduce the thickness below 12 mm)
0
6 Spring characteristics.
6 springs, marked white: length 29’ 7 mm under a load of 64 + 4.5 kg.
0
3 springs, marked green: length 29 7 mm, under a load of 52 + 4 kg.
0
8 When refitting the toggle carrier plate, see that the marks made when dismantling correspond. Do not forget to fit the washers, determined in
paragraph 5, under the springs.
9 Adjust the clutch on the fixture placing the clutch in the engaged position. Use the fixture (see Pl. 43, fig. 2).
Obtain the dimension (a) 37 mm, between the toggles and the driving plate and dimension (b) 17.8 mm, between the toggle carrier plate and
the driving plate.
TOOLS
DISMANTLING (see Pl. 42).
1 Mark the position of the clutch driving plate (1) on the toggle carrier plate (2). Clear the metal locking the nuts (3)
from the slots of the screws (4). Remove the toggles (5) by unscrewing the adjusting nuts (3) . . . . . . . . . . . . . 14 mm spanner
2 Disengage the clutch driving plate (1), the springs (6) and the spring cups (7).
3 Disengage the toggles (5) and the toggle springs (8).
4 Clean the parts.
ASSEMBLY (see Pl. 42).
5 Grind the clutch driving plate (1) on a lathe (it is preferable to carry out this operation by grinding but if this is
not possible, it can be carried out with a facing tool).
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