TM 5-3825-225-14&P(c)Internally stepped compression.(d)Laminated segment oil control.(e)Slotted scraper.(9)Install laminated rings. The procedure for fitting the laminated type is different because the ring has fourseparate segments. These may be fitted by hand in the following sequence with the piston crownuppermost:(a)Install the first segment to the piston (5) so that when held horizontally between the thumb andfingers and radially compressed, the ring ends point downward (see Figure 5-22). Place this ringon the bottom face of the fourth ring groove with the gap over the piston pin bore.(b)Install the second segment on top of the first, so that when compressed as described above theends point upward. Position the gap at 180 to that of the first segment.(c)Install the third segment as in (a) above with the gap immediately above the gap of the firstsegment.(d)Install the fourth segment as in (b) above with the gap immediately above the gap of the secondsegment. If all the segments have been fitted correctly, they will be positioned as shown Figure 5-22. The gaps of the remaining rings should be staggered alternately along the piston pin axis.(10) Liberally lubricate the rings (1) in their grooves and ensure that they move freely. This does not apply tothe laminated type in the fourth groove, which if correctly fitted should not move freely due to theoutward pressure of the top and bottom segments on the ring groove walls. When all the rings havebeen fitted, they should be as shown in Figure 5-22.(11) Install spring loaded scraper ring. When fitting the chrome plated spring loaded scraper ring (see Figure5-23), the following should be adopted:(a)Install internal expander (1, Figure 5-23).NOTEWhen fitting rail rings, gaps should be staggered.(b)Install two rail rings (2) at the bottom of the groove.(c)Install spiral ring (3).(d)Install two top rail rings (2).Figure 5-22. Piston Ring Installation.TA5063415-21
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