Doosan DP158L Series, Руководство по эксплуатации и техническому обслуживанию

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10. Cylinder block/head
153
Cylinder block
Check of Cylinder Block
1. Cleanse the cylinder block and check if there is any
cracked or damaged part with naked eye.
2. Replace the cylinder block if it is seriously cracked or
damaged. Repair tiny cracks if existing.
3. Check if the oil path or coolant path is clogged or
corroded.
4. Perform the hydrostatic test to check whether there is a
crank or an air leakage.
5. Block the discharging outlets of the cooling water path
and the oil path of the cylinder block and put pressure of
4 kg/cm
2
on the inlet. Then sink the cylinder block in the
70
°
C water for 1 minute and check if air leaks.
Measurement of Cylinder Liner
1. Assembly the cylinder liner at the cylinder block and
measure inner diameter at upper, middle, lower that is, 3
step by 45° interval.
DV2213111A
2. Calculate the average values after eliminating the
maximum and minimum values.
3. If the measured values are very close to the limit value or
beyond, replace it.
Standard Limit
Ø
127.990 ~
Ø
128.010mm 0.15mm