Volvo Penta TMD22 Wartungshandbuch PDF herunterladen (Seite 41)

Piston and connecting rod

Piston rings, replacement

(13A-04)

Remove the piston rings with an appropriate piston

ring pliers Separate the ring gap just sufficiently

that the ring ends do not damage the piston. Keep

the rings together with the relevant piston.

Install the piston rings with an appropriate piston

ring pliers Separate the ring gap just sufficiently

that the ring ends do not damage the piston.

Insert the expander ring for the oil scraper ring in

the lower piston ring groove with the catch through

both end of the rings (A). Install the oil scraper ring

over the spring (B). Ensure that the ring gap is lo-

cated with a 180° offset to the catch.

Install the cast iron rings with the conical surface in

the second piston ring groove with the word “TOP”

or the manufacturers symbol towards the top. The

new piston rings have a green identification mark.

This must lie to the left of the ring gap when the ring

is installed and the piston is raised.

Install the “barrel face” ring with the molybdenum in-

sert in the upper piston ring groove (TMD22P,

TAMD22 Keystone ring). The word “TOP”, the man-

ufacturers mark or the internal milling must face the

top of the piston. The new piston rings have a red

identification mark. This must lie to the left of the

ring gap when the ring is installed and the piston is

raised.

Ensure that the ring gaps are offset 120° internally.

MD22L, MD22, TMD22

TMD22P, TAMD22

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Volvo Penta TMD22 Wartungshandbuch Seite 41