Assembling Piston And Connecting Rod - TOHATSU MFS25 Service Manual

37) Assembling Piston and Connecting Rod

Install connecting 2, piston pin 3, and piston pin clip 4 to
1.
piston 1.
• Point "3RO-UP" mark of connecting rod a and
"UP" mark b of piston at the same direction.
• Be sure to use new piston pin clip, and place
clip gap away from piston pin groove c as
shown.
• Be sure that individual connecting rod cap is
installed to their original connecting rod.
Put expander 5 ( #4 ) into oil ring groove, and check that
2.
ring ends meets correctly as shown.
While holding expander 5 ( #4 ) gap with thumb, put upper
3.
side rail ( #3 ) into the groove so that the gap is away from
gap of expander 5 ( #4 ) to the left by 90 degrees.
4. In similar way, put lower side rail ( #5 ) into the groove so
that the gap is away from gap of expander 5 ( #4 ) to the
right by 90 degrees.
5. Install second ring (#2 taper) and top ring ( #1 ) to piston.
Install the rings so that their side with manufacturer's
identification d (T) faces upward.
6. Install piston ring so that their gaps are away from each
other.
Be careful not to scratch piston surface
and damage rings.
• Install piston rings so that their gaps are away
also from thrust direction of piston and
direction piston pin.
• After installing piston rings, check that they
move smoothly.
25/30 2006
CAUTION
4
3
2
a
d
＃5
＃4
＃3
＃2
＃1
2
b
1
4
c
5
5
5
#2 45¡ 45¡
#3
#4
P
#5 #1
d
5-53