DS 19 OPERATION No. DS 100-3 : Overhauling an engine 58
TOOLS
d) Fit the chain and pinion assembly, making sure that the keys are properly located on the camshaft and crankshaft.
Tighten the camshaft nut to 108 ft/lbs (15 m.kg) (spanner 1731-T. see Pl. 15 fig. 3) and that of the crankshaft
to 144 ft/lbs (20 m.kg) (spanner 1667-T, see Pl. 15, fig. 1) wedging the crankshaft by means of a wedge inserted
between the crankshaft throw and the crankcase or with the aid of the setting gauge 1680-T. Turn down the locking Spanner 1731-T
tabs on the nuts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Spanner 1667-T
Setting gauge 1680-T
38 To fit the oil pump :
a) Bring the crankshaft to top dead centre on the 1
st
cylinder (end of compression).
b) Engage the oil pump so that the driving groove is parallel to the centre line of the engine, and the small side
towards the inside of the engine after it is put in position. Tighten the pointed screw to 11 ft/lbs (1.5 m.kg)
maximum so as not to crush the tube and tighten the locknut to 22 ft/lbs (3 m.kg) . . . . . . . . . . . . . . . . . . . . . . . . 17 mm spanner
c) Place the tapered unions in the cylinder of the body of the pump.
Fit the oil pipe between the pump and the cylinder, tighten the union nuts to 43 ft/lbs (6 m.kg) and the locknuts
to 29 ft/lbs (4 m.kg) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-26 mm spanners
39 To fit the sump and timing cover :
a) In the bearing grooves place :
at the front : the cork joint (of which the ends have been smeared with Festinol).
at the rear : the cork joint (of which the ends have been smeared with Festinol) and the sealing plate for the
groove in the cap.
Put Festinol on the joints and in particular in the corners.
Fit the sump. Tighten the sump screws. No washers are fitted under the heads of the screws. The longest
screws are fitted to the front and rear bearings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Tee spanner
12 mm socket
b) Fit the timing cover, insert a paper joint. Smear the surface receiving the joint with Hermetic or Festinol.
Fit a brass washer under the heads of the three screws projecting on the inside of the timing cover or smear
the underside of the heads with Hermetic (new screws have a collar).
Tighten the screws to 11 ft/lbs (1.5 m.kg) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 mm box spanner
40 Fit the flywheel, tighten the screws to 36 ft/lbs (5 m.kg) (torsion spanner 2471-T, see Pl. 7, fig. 2).
There are no lockwashers under the heads of the screws . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Torsion spanner 2471-T
17 mm socket
41 To couple the clutch to the engine flywheel :
a) Make sure that the bearing faces for the disc on the flywheel and the clutch are clean.
b) Couple the clutch to the flywheel using a mandrel (mandrel 1712-T, see Pl. 44, fig. 4) of a primary shaft to centre
the disc. Make sure in the course of tightening that the mandrel slides normally, thus indicating a good centring of Mandrel 1712-T
the disc. Tighten the screws to 14 +
2
ft/lbs (2 +
0,250
m.kg) (spring washers under the heads). Remove the mandrel. 12 mm box spanner
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