Piston Installation; Installing The Pistons With The Connecting Rod - Husqvarna NUDA 900 R 2012 Workshop Manual

NUDA 900 2012/2013 - NUDA 900 R 2012/2013
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Workshop Manual Ed. 11-2011
CRANKCASE DISASSEMBLY

Piston installation

- When fitting the piston pin, make sure that the version of the pin and the
connecting rod are the same.
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- Lubricate the piston pins with engine oil.
- Heat the piston to approx. 50°C.
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- Insert the connecting rod and the piston pins (2), paying attention to the
installation position.
- The mark on the connecting rod small end (arrow) must indicate the exhaust
side (pay attention to the mark on the piston crown).
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Loose piston rings or piston pins can damage the cylinder liner.
Make sure that the piston rings are perfectly positioned on the piston
H10390 pin!
- Fit the new safety rings (1).
- Hook the safety ring with the prong in the notch and press them in the groove,
the ring must engage correctly in the specific seat.

Installing the pistons with the connecting rod

- Turn the engine to the installation position.
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- Pay attention that the gaps between the sealing rings do not coincide with
the piston rotation axis.
- Turn both the piston ring gaps (3) approx. 30° with respect to each other
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(lens).
- Offset the gaps of the other piston rings (2), (1) respectively 120° with respect
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to the upper gap of the scraper ring .
H10391
- Lubricate the sliding surface of the cylinder and the piston jacket with engine
oil.
- Insert the connecting rod and the piston in the cylinder, paying attention to
the installation direction (arrow (4) on the piston crown must face towards
the exhaust); and to not ruining the cylinder surface with the piston rings.
H10392
F3.14