Cylinder 3. Trouble diagnostics
Symptom
1
Piston rod sliding section oil leak (For the judgment values, see "5. (4)Inspection after assembly".)
2
Cylinder head matching section oil leak
3
Pipe and cylinder tube welding section oil leak
4
Operation defect Related part
Symptom
E
Symptom
IN
Item
Countermeasure and solution
CO US N F E ID O E F N TS TI M AL GL : F O OR BA T L H
Item
TE RN
AL
Hydraulic cylinder trouble, countermeasure and solution It is not easy to discover trouble locations.The table below shows general symptoms, suggested causes and also solutions. For repairs, see the suggested causes and solutions in the table. The cause of machine problems are often not rooted in just a single part. Problems are often due to the relationship of one part with another.In some cases, solutions are required other than those given in the table.In such a case, contact with our company to investigate the problem and its cause further and take appropriate measures.
Piston rod
1
① Remove the scratches with a whetstone to make the sliding surface smooth (1.5 s or lower).If the oil leak continues, the rod scratches may have damaged the U-ring or A sliding surface has other seal, so disassemble and inspect. rust and scratches that catch on a fin② If the scratches or rust cover too large an gernail. area to be repaired with a whetstone, replace the piston rod and the U-ring, wiper ring, or other seal and the piston rod bearing part. ① Replate or replace the piston rod. ② At this time, inspect the seals and piston rod Plating is peeling off. bearing part as well and replace any that are damaged.
Piston rod sliding section oil leak
There is foreign mat① Remove the foreign matter. ter caught in the inner or outer diame- ② If the packing is damaged, replace it. ter section.
Rod packing (Buffer ring and U-ring)
There are scratches on the inner or outer Replace the part. diameter section. The lips and groove section are locally carbonized (scorched).
164
① This may be scorching due to adiabatic compression of air remaining in the cylinder. ② When operating the cylinder for the first time after replacing a packing, run at low pressure and low speed to adequately bleed off the air.
ASM-17-24-002EN 13
