DS 19 OPERATION No. DS 120-1 : Work on the timing gear. Op. DS 120-1 87
TOOLS
11 Place the engine-gearbox assembly on a stand (stand 2497-T, see Pl. 19) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Stand 2497-T
31 Remove the air filter and tube assembly.
Remove the cylinder head cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-17 mm box spanners
32 To remove the cylinder head (see Op. DS 112-1, paragraphs 3 to 16).
33 Remove the tappets (extractor 1608-T, see Pl. 17, fig. 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Extractor 1608-T
34 Remove the timing cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 mm box spanner
35 Remove the timing chain and pinion assembly (see paragraph 3, this operation).
Remove the key from the camshaft.
36 Remove the screws fixing the camshaft thrust flange (15). Remove the flange (15) . . . . . . . . . . . . . . . . . . . . . . . . 12 mm box spanner
37 Remove the petrol pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 mm box spanner
38 Withdraw the camshaft from the rear of the engine.
Assembly (see Pl. 1).
39 Fit the ring seal (47) in the groove on the splined portion of the camshaft. Oil the bearing surfaces of the camshaft
and engage it from the rear of the engine.
Fit the rear thrust flange (15), tighten the screws to 7.2 ft/lbs (1 m.kg) and turn down the lock-tabs . . . . . . . . . . 12 mm box spanner
40 Fit the timing chain and pinion assembly, fit the timing cover (see paragraphs 4 to 7, this operation).
41 Fit the petrol pump, inserting a cork joint. Tighten the fixing nuts (spring washers) . . . . . . . . . . . . . . . . . . . . . . . . 14 mm box spanner
42 Fit the tappets, previously oiled (extractor 1608-T, see Pl. 17, fig. 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Extractor 1608-T
43 Fit the cylinder head (see Op. DS 112-1, paragraphs 19 and 20).
44 Adjust the valve rocker clearances (see Op. DS 112-0).
45 Fit the steel cups (3) and the rubber joints (4) on the sparking plug tubes.
Fit the cylinder head cover, using Hermetic to secure the gasket to the cover only. Tighten the fixing nuts
(plain and leather washers).
Fit the air filter and tube assembly. Tighten the fixing nuts (spring washers) . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-17 mm box spanners
46 Fit the accelerated idling control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 mm ring spanner
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