3.2 Use a vernier caliper to measure rough
diameter of the cylinder hole.
3.3 Adjust the outside micrometer to the data
measured out by the vernier caliper, select the
splicing pole suitable to the range of the cylinder
gauge, and then set the outside micrometer to zero
according to this data.
3.4 Place the cylinder gauge into the cylinder to
measure; when measuring, the yawing angle of
cylinder gauge should not exceed 15º. Fetch the
maximum numerical value.
3.5 The measuring position of the cylinder gauge
in cylinder is as shown in the figure.
Calculation method for roundness: A-B or a-b
Calculation method for cylindricity: the difference
of maximum diameter subtracting minimum
diameter among A, a, B, and b.
The normal value should be: if roundness or
cylindricity exceeds the range, replace with new
cylinder block or install new cylinder sleeve.
3.6 Measurement of planeness of cylinder block:
use steel rule and feeler gauge to measure
planeness of the cylinder block. If the planeness
exceeds the range, replace the cylinder block.
Upper stop position of piston
Lower stop position of piston
