I am just starting to use my new machine and opened the top to modify/shorten the palm switch tubes. Inside the enclosure there was a few ounces of oil puddled under one of the pressure relief valves. These valves have released twice now due to my error on a bend setup choosing the wrong die, bottoming out the punch. According to the manual, the outflow after triggering these should recirculate back into the reservoir, and it looks like all the hoses are connected properly. Is there something I can tighten to prevent the oil from spilling out into the enclosure? I couldn’t get an adjustable wrench on the fitting and it’s bigger than any wrench I have on hand.
Based on the symptoms you are seeing, I think you should perform a PRV reinforcement and PRV calibration increase procedure on your machine.
PRV Reinforcement
There are three parts to the PRV (Pressure Relief Valve):
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The upper valve body - a part that can rotate and the position of which determines the pressure calibration.
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The Jam nut - a nut that tightens upwards and holds the upper valve body in its calibrated position.
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The base 1" nut that is used to screw the part into the pump.
To reinforce your PRV to prevent a leak through the threads you need to:
- Mark down the current alignment of the upper valve body with the base 1" nut - if there is not one already, draw a sharpie line on the 1" nut and the upper valve body so you know how they are currently set.
2. Twist the jam nut downwards to loosen it, and then twist the upper valve body an eighth turn (45 degrees at MOST) turn upwards to loosen it - no further than that. If you try to unscrew the upper valve body all the way it can shoot upwards on the spring and cause quite the mess.
3. Wrap the threads with 2-3 extra layers of teflon tape.
4. Twist the upper valve body back to its original location so that your sharpie mark on the upper valve body lines up with the lower 1" nut sharpie mark again. Twist the jam nut upwards to tighten it against the upper valve body.
Pressure Relief Valve Calibration Increase
To tune up your PRV, you will want to loosen the jam nut downwards slightly, turn the upper valve body about 90 degrees tighter to the right, and then tighten the jam nut upwards to secure the assembly again.
If your upper valve body and base 1" do not have a sharpie mark showing their default alignment, I would add one before working to tighten it up. That way you can keep track of how far you have tightened the valve past the pre-calibrated position. DO NOT TUNE YOUR VALVE MORE THAN 180 DEGREES PAST THE PRE-CALIBRATED VALUE WITHOUT CONTACTING THE SUPPORT STAFF FIRST.
You will also want to bleed your machine before you run another high-tonnage bend like that. https://www.langmuirsystems.com/titan25t/assembly#titan25t-manual-19
On your next bends, please take a video of the live report window so we can watch what is happening to the tonnage and ram positions. Especially on your first 90 degree tuneup. That way if your first 90 degree tuneup fails, you will be able to keep track of how much the pressure limit was raised by that 90 degree twist. You will generally want to make a 20 degree twist for each ton you are short.
Lowering the bend speed to 1 IPM for an extremely high tonnage bend will help, especially on the initial calibration after your first PRV adjustment. It will make spotting the high tonnage point on your post-calibration bend easier. It will also reduce the force required to make the bend.
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