Ingersoll-Rand 3IRH2N, Руководство по ремонту

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102
4.4.5
Parts inspection and measurement
(25) Cylinder block
Especially clean head surface, cylinder bores and oil
holes, and check after removing any carbon deposit and
bonding agent.
(a) Appearance inspection
Check if there is any discoloration or crack. If crack is
suspected, perform color check. Sufficiently clean the
oil holes and check they are not clogged.
(b) Cylinder bore and distortion
Measure at 20 mm below the crest of the liner, at 20
mm from the bottom end and at the center.
Roundness:
Roundness is found as follows though it is the
simple method. Measure cylinder diameters of the A
direction and the B direction on each section of a, b
and c.
Roundness is the maximum value among those
difference values.
Cylindricity:
Cylindricity is found as follows though it is the
simple method.
Measure cylinder diameters of a, b and c sections
in the A direction, and calculate the difference in
maximum value and minimum value of the
measured diameters.
In the same way measure and calculate the
difference in the B direction.
Cylindrically is the maximum value between those
difference values.
mm
Item Model Standard Limit
3IRH2N 82.000 82.030 82.200
3/4IRH8N 88.000 88.030 88.200 Cylinder inside diameter
4IRI8N 98.000 98.030 98.130
Roundness
Cylinder bore
Cylindrically
all IRH/IRI 0.01 or less 0.03