Piston Disassembly/Assembly - Honda GX240RT2 Service And Repair Manual

CRANKCASE

PISTON DISASSEMBLY/ASSEMBLY

Remove the piston
NOTE: Honing should be performed on engines with cast iron sleeves
the existing cylinder is within service limits and reused.
PISTON RING SET
ASSEMBLY:
Be sure that the top ring and second ring are
not interchanged.
Install the top ring and second ring on the
piston with the maker mark side facing up.
Check that the piston rings rotate smoothly
after installing them.
Space the piston ring end gaps 120 degrees
apart, and do not align the ring end gaps with
the piston pin bore.
PISTON
PISTON PIN
PISTON PIN CLIP (20 mm) (2)
ASSEMBLY:
Install by setting one end of the piston pin
clip in the groove of the piston pin bore,
holding the other end with long needle
pliers, and rotating the clip in.
Do not align the end gap of the piston pin
clip with the cutout of the piston pin bore.
PISTON PIN CLIP
CUTOUT
gx240ut2_gx270ut2_gx340ut2_gx390ut2
(page 13-5).
TOP RING
10 mm (0.4 in)
SECOND RING
OIL RING
END GAP
(page 13-16) whenever the piston rings are replaced and
MAKER MARK
120°
120°
120°
10 mm (0.4 in)
SIDE RAIL
LONG END
TOP RING
(Chrome plated)
SECOND RING
SIDE RAIL
OIL RING
(COMBINATION
RING)
SPACER
MARK
PISTON
CONNECTING ROD UPPER
ASSEMBLY:
Set the connecting rod upper with
the long end toward the mark on
the piston head.