Piston And Piston Rings - Perkins UA Workshop Manual

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Piston and piston rings

To remove and to fit
Any letters or markings on a surface of a ring will always be on the top face (facing upwards).
Caution: Only expand the ring gaps enough to ensure that the ends of the rings do not damage the piston
when the ring is removed or put into position. Fit the spring of the oil control ring in the bottom groove of the
piston, with the latch pin inside both ends of the spring. Fit the oil control ring over the spring. Ensure that the
ring gap is at 180° to the latch pin. The manufacturer's symbol or the word 'TOP' (A1), must be towards the top
of the piston.
The piston ring profile shows the 1st (A2), 2nd (A3) and oil control (A4) rings.
Service operations
Remove the piston assembly, see Operation 4-3.
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This document has been printed from SPI². Not for Resale
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Workshop Manual, TPD 1392E, issue 3
700 Series
Operation 4-7
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3
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