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Well, first time poster here. Hopefully you guys can lend some insight into the problems we're having at one of the remote plants.
Woodward control system, feedback to the control system from 33CS and 33HR
We can't seem to get this ratcheting gear to function as it should, we have the cover off and basically what's happening is at the start of the cycle we can see the 2 cylinders close hard pressing the jaws together, then it turns backwards (ie unlocking the jaw) for about 3 seconds, then forward for about 6 seconds to where the jaws JUST get into the locked position and starts turning the shaft, then it reverses again for about 2 seconds where now the jaws now are completely unlocked, then 33HR is triggered, our woodward system kills the 120VDC to the 20CS and the 88HR and now since the 2 cylinders are spring loaded the jaws completely seperate and the cycle continues.
We've had a couple GE "specialists" come to the site and basically didn't know a whole lot, the one recommended we replace the 20CS so we did and got a brand new module with the 33HR included/installed (so assuming it's calibrated properly) and from what the operators tell me it worked perfect for about 1.5hrs after the new one was installed and now is failing just like before.
We don't have any pressure transmitters or anything on the lines, all we have is a gauge on the input prior to the FH1 filter, at startup it bounces around 500+PSI and is fairly erratic, then at the end of the cycle it shoots up to 1350 where the VR5 pressure release is set at and slowly decreases to zero.
Currently, we've installed a block to hold the jaws in place so they can't retract and this works to keep the ratcheting going, but it means when we want to fire up the unit we have to send someone out to pull the block... PITA. But when we do have the block in there is easily enough hydrolic pressure to turn the shaft.
So, I'm not sure where exactly to start. We checked the 33CS switch and are definitely getting a signal from it and reading the few manuals we have we set the switch to activate about 2/3rds into the clutch teeth engaging, and we can see 33HR switch off/on during the cycle...
I know my details might be a bit vague but bear with me this is the first ratcheting gear I've ever looked at plus first time on a Woodward system and have only worked with both for about 6 hours total!
How exactly is this gear supposed to function? I expected to see the teeth close, the gear turn forward locking the teeth, then at the end of the cycle maybe retract slightly to release the teeth but not enough so the cylinders would push the jaws completely apart, then stop and wait 3 minutes to repeat the cycle? Is that somewhat accurate or am I missing something
Woodward control system, feedback to the control system from 33CS and 33HR
We can't seem to get this ratcheting gear to function as it should, we have the cover off and basically what's happening is at the start of the cycle we can see the 2 cylinders close hard pressing the jaws together, then it turns backwards (ie unlocking the jaw) for about 3 seconds, then forward for about 6 seconds to where the jaws JUST get into the locked position and starts turning the shaft, then it reverses again for about 2 seconds where now the jaws now are completely unlocked, then 33HR is triggered, our woodward system kills the 120VDC to the 20CS and the 88HR and now since the 2 cylinders are spring loaded the jaws completely seperate and the cycle continues.
We've had a couple GE "specialists" come to the site and basically didn't know a whole lot, the one recommended we replace the 20CS so we did and got a brand new module with the 33HR included/installed (so assuming it's calibrated properly) and from what the operators tell me it worked perfect for about 1.5hrs after the new one was installed and now is failing just like before.
We don't have any pressure transmitters or anything on the lines, all we have is a gauge on the input prior to the FH1 filter, at startup it bounces around 500+PSI and is fairly erratic, then at the end of the cycle it shoots up to 1350 where the VR5 pressure release is set at and slowly decreases to zero.
Currently, we've installed a block to hold the jaws in place so they can't retract and this works to keep the ratcheting going, but it means when we want to fire up the unit we have to send someone out to pull the block... PITA. But when we do have the block in there is easily enough hydrolic pressure to turn the shaft.
So, I'm not sure where exactly to start. We checked the 33CS switch and are definitely getting a signal from it and reading the few manuals we have we set the switch to activate about 2/3rds into the clutch teeth engaging, and we can see 33HR switch off/on during the cycle...
I know my details might be a bit vague but bear with me this is the first ratcheting gear I've ever looked at plus first time on a Woodward system and have only worked with both for about 6 hours total!
How exactly is this gear supposed to function? I expected to see the teeth close, the gear turn forward locking the teeth, then at the end of the cycle maybe retract slightly to release the teeth but not enough so the cylinders would push the jaws completely apart, then stop and wait 3 minutes to repeat the cycle? Is that somewhat accurate or am I missing something