Checking The Piston Pin - Orion AGB-21G Service Manual

CYLINDER AND PISTON
2. Install:
piston ring
(into the cylinder)
NOTE:
Level the piston ring in the cylinder with the pis-
ton crown as shown.
a 5.0 mm
3. Measure:
piston ring end gap
Out of specification
ring.
NOTE:
The oil ring expander spacer's end gap cannot
be measured. If the oil ring rail's gap is exces-
sive, replace all three piston rings.
Piston ring end gap
Top ring
2nd ring
Oil ring

CHECKING THE PISTON PIN

1. Check:
piston pin
Blue discoloration/grooves
piston pin and then check the lubrication sys-
tem.
2. Measure:
piston pin outside diameter a
Out of specification
pin.
Piston pin outside diameter
13.994
3. Calculate:
piston-pin-to-piston clearance
Out of specification
and piston as a set.
4 - 29
Replace the piston
0.10 0.25 mm
<Limit>: 0.60 mm
0.15 0.30 mm
<Limit>: 0.60 mm
0.2 0.5 mm
Replace the
Replace the piston
14.000 mm
Replace the piston pin