Joyner JNSZ1100SVB, Owner'S Manual, Page: 90 / 228

hole diameter shown as the following
figure, take the minimum value as the
size of the pinhole diameter.
2.9.3. Work out the clearance on the basis
of the size difference between the
hole diameter and the pin diameter.
Replace the piston pin or the piston if
the result exceeds the benchmark
value.
[Benchmark] 0.004-0.009mm
[Limit] 0.015mm
2.9.4. Measurement of the piston diameter
2.9.4.1. Make the measurement at the
position 11mm below the piston
skirt and along the vertical
direction of the piston pin.
[Benchmark] 72
–
0.013
–
0.025
2.9.5. Check the clearance between the
piston ring and the ring groove
2.9.5.1.
Use a feeler to measure the rings
2.9.6. Check the clearance of piston
ring ends
2.9.6.1. Put the piston ring i n the position
which is 45 mm under the cylinder
hole top surface, in order to make
the piston ring keep flattened, you
can press the piston ring with
piston top surface, then use a
piston gauge to measure the open
Benchmark(mm)
Limit (mm)
Primary ring 0.03~0.06 0.12
Secondary ring
0.03~0.06 0.11