Fig. 20
Fig. 21
d) REMOVAL AND REFITTING OF CONNECTING
ROD & PISTON ASSEMBLY
This procedure is the same as for earlier engines.
e) REMOVAL AND REFITTING OF CRANKSHAFT
(INCLUDING BALL BEARING)
- In order to remove or replace the bearing, the shroud
base must be pre-heated to 80/100 deg C. (Fig. 20)
- The shaft and bottom bearing may also be removed by
heating the cylinder as above.
- The bottom bearing may be removed from the shaft
with the aid of a standard puller.
NOTE - This operation renders the ball race unserviceable
and a new bearing should always be fitted. hen fitting a
new bearing ensure that both shaft and bearing faces are
clean.
NOTE - Support the crankshaft webbs when driving on
new PTO bearing (FIG 21, A)
- Heat block as per above and refit the crankshaft
f) SHROUD BASE REASSEMBLY
Assembly should be made only after expanding the base.
- Place the gasket on the cylinder.
- Heat the shroud base by immersing in oil or water at a
temperature of about 80/100 deg C (Fig 20).
- Support the base and press in new bearing.
- Press bearing and base assy on to crank (Fig 22)
- Replace the 4 screws
- If the crankshaft does not turn easily, strike p.t.o. end
with a copper hammer in order to fully seat bearing.
- Assemble the oil seal as per instructions for earlier
engines.
NOTE - Should the base be heated in water, after
assembly start the engine and let it run for a few minutes
in order to dry and so avoid internal oxidation.
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