Release Time: 2020-07-27
Source:
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Inspection of cylinder block of Hitachi crawler
excavator:
Remove water rust or other impurities on the surface of
the cylinder block, remove the liquid sealant on the crankcase installation
surface, and clean the cylinder block. Note: Do not damage the cylinder block.
Perform color inspection and hydraulic (pneumatic)
testing. If cracks or other damage are found, replace the cylinder block.
(1) Check whether the inner surface of the cylinder liner
is cracked or damaged.
(2) When the cylinder sleeve is in the cylinder block,
measure the inner diameter of the cylinder liner at the most severely worn part
at a distance of 15-20 mm from the top of the cylinder liner. If the wear
exceeds the limit, replace the cylinder liner. Note: Since there is only one
specification for the inner diameter of the cylinder liner, there is no need to
select the inner diameter grade of the cylinder liner.
(1) Pull out the cylinder liner to remove the scale on
the cylinder block.
(2) Use a ruler and a thickness gauge to measure the gap
between the 4 sides and 2 diagonals on the upper surface of the cylinder block.
Check the upper surface of the cylinder block. If the measured value exceeds
the limit, replace the cylinder block.
If you are not very clear on how to inspect cylinder block of Hitachi crawler excavator, you can seek help from China Machinery Engineering Machinist.