Bukh DV36/48, Руководство по ремонту

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IJ4
009W2329-R01
Exchange of Pistons
If the pistons are scored or very worn, exchange them for new ones.
This is carried out as follows:
1. Remove the pistons with connecting rods as stated on page IJ 3.
2. Take off one of the locking rings at the gudgeon pin.
3. Knock out the gudgeon pin with a punch.
4. Place the new pistons upside down. Pour a little spirit into them and light it.
The heating can also take place on a boiling plate.
5. When the piston has reached a temperature of about 100°C, smother the fire. Place the
connecting rod in the piston before the oiled gudgeon pin is pushed in.
It is recommended to cool down the gudgeon pin first, e.g. in a deep freezer or by means
of nitrogen or carbonic acid, if it is possible.
6. Relock the gudgeon pin with the locking ring.
Carefully observe that the piston is placed correctly in proportion to the numbering on the
connecting rod.
Weight of piston complete: 1,088 grams ± 7 grams.