13-20
6) Install the piston rings in the ring grooves in the piston with
the marker marks on the top ring and the second ring
facing up.
Install the side rail (top side) by aligning the lug of the side
rail (top side) with the positioning groove in the ring
groove.
• Clean the ring grooves thoroughly before installing the
piston rings.
• Install the piston rings with care not to break the piston
rings. Take care not to score or scratch the piston.
• Do not confuse the top ring and the second ring. The top
ring is glossy while the second ring can be identified with
the dark color.
• To install the oil rings, install the spacer first, then install
the side rails.
• Be sure that the lug of the side rail (top side) sets in the
positioning groove securely.
NOTICE
7) After installing the piston rings, check for smooth
movement of each ring. [Except side rail (top side)]
8) Stagger the piston ring end gaps as shown.
Do not align with the piston pin and avoid the direction that
makes a right angle with the piston pin.
NOTICE
[1] DIMENSIONS OF PISTON RING:
A
B
[2] TOP RING
A: 3.1 mm
B: 1.2 mm
SECOND RING
A: 3.4 mm
B: 1.2 mm
[1]
TOP RING
[2]
SECOND RING
[4]
OIL RINGS
[5]
SIDE RAIL
(SKIRT SIDE)
[9]
PISTON
[7]
GROOVE
[8]
LUG
[3]
SIDE RAIL
(TOP SIDE)
[3]
SIDE RAIL
(TOP SIDE)
[6]
SPACER
[1] TOP RING
[2] SECOND RING
[3] SIDE RAIL
(TOP SIDE)
[5] SIDE RAIL
(SKIRT SIDE)
[4] SPACER
[6]
SIDE RAIL
END GAP
(TOP SIDE)
[FIXED
POSITION]
[9]
SPACER RING
END GAP
[10] SIDE RAIL
END GAP
(SKIRT SIDE)
[14]
TOP RING END GAP
[13] SECOND RING
END GAP
[12]
PISTON
PIN
[7] APPROX. 10˚
[8] APPROX. 15˚
[8]
APPROX. 15˚
[11]
APPROX. 120˚
[11]
APPROX.120˚
