Hydraulic Cylinder Force Over Pre Set Limit

One fine morning, where the bird chirping happily, and the sunny shine nicely...

Mr.X: (reading a SMS that just arrived)

hello brother! We had problem with the cylinder hydraulic, the force on the operational side is going higher beyond preset,resulting some parts of the machine damaged. our team has been doing troubleshooting since last night...suspected EMG Valve problem- Mr. XX

Mr.X: hrmm...what happened here? (asked him once arrive at the crime-scene)

Mr.XX:well the force still go beyond the limit. We suspected the EMG problem. We already take out the EMG valve out, and service it by cleaning all the suspected dirt on the hole. We also already has keep on setting the spool..but the problem still remain unsolved..

Mr.X: well...let me ask the operator first..has you ask the electrical team to check on their system?

Mr. XX: they are checking their programming at the MCC room..

Mr. X: Alrite!

(after collecting some information and finding the root cause of the problem)

Mr. X: (thinking intensely to solve the problems)

Why do they all focusing on the EMG valve? Is it because only the cylinder are connected to the EMG Valve? But the main problem is the force overshooted from the pre set limit. EMG Valve only responsible on controlling directional, speed and steps..hrmm..suspected not only the EMG Valve problem...the main suspected problem is the PRV (Pressure Regulator Valve)..ah ha..let we try to change this first!

Mr.X: Ok my supervisor..lets change this PRV first before we try to change the EMG valve..he is the main crime suspect...mwahaha

Mr. Supervisor: Alrite...

While changing the PRV, Mr.X asking the ElectricMan on some electrical stuff

Mr. X: Yo LetricMan...want to ask something..since the problems occur after the unsuspected electricity power supply shutdown..do the any chances for the EMG Valve socket to damage due to overflow electricity after start-up?

LetricMan: Well..this can't be happen..because we had equip circuit breaker to the EMG Valve circuit in order to protect them..Let me show you...here is the circuit breaker...if the current overshoot during startup....the circuit breaker will trip and disallow the current to flow to the EMG Valve circuit..

Mr. X:i see...

After installation completion...

Mr. Supervisor: Ok..let the operator test...









After a few test run..the operator confirm the system back to normal..and the operation resume...



Problem: PRV malfunction
Cause: Suspected the PRV's spool damaged due to wear and tear
Countermeasure: Replace the PRV with a new set


CASE CLOSED