Gb 4028 with saw beds
One customer reported that one of their second-hand gb 4028 saw beds (out of the factory in 2011) had risen and declined infrequently, having been repaired for more than a week, and had been replaced with tanks, valves and speed valves。
At the time of maintenance, sawn beds were under normal hydraulic pressure, and manual compaction of the tank was normal, excluding the issue of pumps. Electromagnetic valves were checked, lights were lit, electrical resistance values were measured for the electromagnetic valve wires were normal, about 22 times, direct current sources were normal and the electromagnetic valves were excluded. There may be a string of oil left over from the tank, leading to an increase or decrease, and a new tank is purchased to replace it, and the problem is still not completely resolved。
Raise the tank
Electromagnetic switching valve 4we6e-61b/cg24n9z5l
The problem remains that the lifting tank has been replaced, and it may be that the electromagnetic valve core has been jammed, the electromagnetic valve has been removed, the electromagnetic valve has been installed, and the situation remains the same, and the replacement of the electromagnetic valve has been purchased and the problem remains unresolved。
As a result of these repairs, colleagues have called me to say that the direct flow of the electromagnetic valve has reached the electromagnetic valve wire, manually thrust the electromagnetic valve core, and that the lifting of the tank is normal, it is a new electromagnetic valve, possibly an electrical failure。
Saw-bed voltage
On the site of the user today, an inspection of the electromagnetic valve wires and direct current power sources was carried out, and no anomaly was found, which was so strange that the entire bridge (type: kbcc 3510, reverse voltage 1000v, output current 35a) was bad that it could not drive the load. The flow bridge is measured in a binary slot with a spare meter, and the four inner diodes are normal。
Kpc 3510
The result of the measurements of the whole stream bridge was not unusual, and the replacement method was used to replace the same whole stream bridge, but not at the site, where a switch was found for the power source mdr-60-24, which would have satisfied the operation of the electromagnetic valve。
Switching power mdr-60-24
Switch the power supply installed, wired, re-engineered, the tank lifted and operated for an hour。
It also appears that the current bridge was poorly run, that it was the first time that it was properly tested, and that kbcc 3510 was unable to carry an electromagnetic valve ring of about 30 w power with maximum output 35a, which was a good part of the test, and that no problem could be identified but with substitution。
No faulty maintenance with saw beds
Gb 4028 sawn beds rise and fall, sometimes without failure maintenance
