DS 19 OPERATION No. DS 111-1 : Work on the crankcase. Op. DS 111-1 63
TOOLS
19 To remove the sealing shells (see Pl. 14):
a) Remove the assembly screws (1l} from the sealing shells (13 and 14) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 mm box spanner
b) Remove the bearing fixing screws. Mark the direction of assembly of the centre bearing cap, remove the
bearing caps together with their bearings and mark the latter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 mm box spanner
c) Raise the crankshaft, connecting rod and piston assembly without removing the pistons from their liners.
Pack up the crankshaft from the cylinder block far enough to enable the fixing screws (40) of the upper section
(13) to be removed.
Remove the sealing shells (13 and 14) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 mm spanner
20 Clean the parts. Carefully scrape the joints.
Assembly.
21 From shim steel 0.10 mm thick, cut a strip 200 mm long and 10 mm wide.
22 To fit the sealing shells (see Pl. 14) :
a) Fit the upper shell (13) on the cylinder block and the lower shell (14) on the bearing cap (smear the bearing
faces of the shells with Festinol). Insert the fixing screws (40) without tightening them.
b) Make sure that the upper bearings (in the crankcase) are clean.
Oil the journals with an oil-can. Place the shim steel strip (prepared in paragraph 21) round the crankshaft
oil thrower (see Pl. 14, fig. 1) and mount the crankshaft in its bearings.
With the lower bearing in position in the front bearing cap, fit the bearing cap. Guide the thrust washer (8)
(see Pl. 1) during this operation.
Tighten the assembly screws (11) of the half shells. Tighten the bearing cap fixing screws to 72 ft/lbs
(10 m. kg) (torsion spanner 2471-T, see Pl. 7, fig. 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 mm box spanner
Torsion spanner 2471-T
17 mm socket
NOTE - Do not rotate the crankshaft while centring the caps.
c) Tighten the fixing screws (40) of the half shells alternately to 9.5 ft/lbs (1.3 m. kg) . . . . . . . . . . . . . . . . . . . . . 12 mm spanner
d) Remove the assembly screws (11) of the half shells. Remove the bearing cap, raise the crankshaft and
remove the shim steel strip . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 mm box spanner
e) Smear the bearing surfaces of the half shells with Festinol around the holes for the screws only.
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