one fitted, this being subsequently ground out to
1.625 in. ±.00025 in. The practice of fitting new
ready-ground big-end bushes is not recommended as
it is difficult to ensure roundness of the bore if this is
done.
Worn small-end bushes can be pressed or drawn
out using the drawer shown in Fig. 4. The new bush
should be reamered to .7507-.7505 in.
Before refitting the connecting rod it should be
checked for freedom from bend or twist using the
fixtures shown in Figs. 17 and 18.
18. Removal of and Replacing Mainshafts.
The driving and timing side shafts are held in to
their respective flywheels by means of tapers and
keys and are easily removed after unscrewing the nuts
which secure them. Note the oil release valve in the
end of the timing side shaft (see Para. 23). The hollow
grub screw securing this must be screwed up tight and
the end of the shaft centre punched to prevent the
screw coming undone.
19. Reassembly of Flywheels.
Always fit the crankpin into the timing side
flywheel first and make sure that the oil hole in the
pin registers with the oil passage drilled in the web of
the flywheel. The best check on this is to pour oil
down the timing side shaft and see that it runs out at
the centre of the pin. The small grub screw in the
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