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Does it have an inline filter? If so, remove the line going into the filter and pump the oil into a container. The gear pump will pick up and push most of the oil out of the system. Then refill the reservoir and test the system.

If no filter, just remove the line that feeds the hydraulic cylinder and let it pump into a container. Same operation, different method.

NOTE- the oil will come out with great force, be careful.

Edited by DSloop

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13 hours ago, turbotexas said:

 

It is not cycling properly, the pump does not change pitch as it is under no load, the signal is not getting to the relay that controls the stroke. if the pump was under load it could be heard as in the hydronic press video. First thing to do is change the oil.

Edited by DSloop

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Check the solenoid for the spool valve.  It might be bad, and not able to fully cycle.  

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19 hours ago, SolarLeatherMachines said:

Check the solenoid for the spool valve.  It might be bad, and not able to fully cycle.  

Where is the solenoid? What does a spoil valve look like? 

 

What I was hoping to see here is this “micro switch”  doing something? No movement that I could see? 

Edited by turbotexas

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19 hours ago, DSloop said:

It is not cycling properly, the pump does not change pitch as it is under no load, the signal is not getting to the relay that controls the stroke. if the pump was under load it could be heard as in the hydronic press video. First thing to do is change the oil.

Oil has been changed, with no change? 

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Tell me if I'm talking out turn here @turbotexas but are you keeping the "trigger" down or just tapping it? Can't quite tell in your videos. My limited understanding of these old presses is that the head rises as soon as the bottom stop is hit or the trigger is released.

If you are keeping the trigger down, maybe see what the solenoid it triggers is doing. If it's only actuating the valve momentarily (no matter how long you press the trigger for) that would give similar results, in my decided non-expert opinion.

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6 hours ago, Matt S said:

Tell me if I'm talking out turn here @turbotexas but are you keeping the "trigger" down or just tapping it? Can't quite tell in your videos. My limited understanding of these old presses is that the head rises as soon as the bottom stop is hit or the trigger is released.

If you are keeping the trigger down, maybe see what the solenoid it triggers is doing. If it's only actuating the valve momentarily (no matter how long you press the trigger for) that would give similar results, in my decided non-expert opinion.

I’ve tried both ways... it’s only a split second and it shuts off on its own! In the beginning of the thread, I posted a YouTube video of the exact same machine... it seems the adjustable knob has been removed in that video? So I’m not sure where to go? It does have a “micro switch” below the table near the pump and motor? I’ll start looking at that next! I’m out of town for a few days, so I’ll hope a lightbulb goes off in one of y’all heads! 

Hopefully someone has a similar unit, and we can compare wiring? 

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On 3/19/2019 at 1:46 AM, turbotexas said:

I’ve tried both ways... it’s only a split second and it shuts off on its own! In the beginning of the thread, I posted a YouTube video of the exact same machine... it seems the adjustable knob has been removed in that video? So I’m not sure where to go? It does have a “micro switch” below the table near the pump and motor? I’ll start looking at that next! I’m out of town for a few days, so I’ll hope a lightbulb goes off in one of y’all heads! 

Hopefully someone has a similar unit, and we can compare wiring? 

Hey TT, this may be a case of the blind leading the blind but in my definitely non-expert opinion I agree that that microswitch and the thing that actuates it is something to look at next. Perhaps the microswitch is jammed "in" and tells the solenoid that the head has reached the bottom of travel all the time? There doesn't look like there's much of that white nubbin sticking out.

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For Christ sake stop putting your fingers and hand under the top whilst its running, only make adjustments when the top is swung away

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Your spool valve is where all the hoses come together.  It sounds like the electric solenoid that activates the spool valve is bad, and not fully cycling.  find the spool valve and see if you can find a replacement.  Parker would probably have a match.  

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Thanks all! I’m out of town working, so I’ll get back to this in a few days! I drive a truck for living! 

9 hours ago, SolarLeatherMachines said:

Your spool valve is where all the hoses come together.  It sounds like the electric solenoid that activates the spool valve is bad, and not fully cycling.  find the spool valve and see if you can find a replacement.  Parker would probably have a match.  

Where the hoses come out of the pump? Or at the cylinder? 

15 hours ago, chrisash said:

For Christ sake stop putting your fingers and hand under the top whilst its running, only make adjustments when the top is swung away

Yes sir! Good advice! 

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16 hours ago, Matt S said:

Hey TT, this may be a case of the blind leading the blind but in my definitely non-expert opinion I agree that that microswitch and the thing that actuates it is something to look at next. Perhaps the microswitch is jammed "in" and tells the solenoid that the head has reached the bottom of travel all the time? There doesn't look like there's much of that white nubbin sticking out.

That’s where I’m looking next! From the wires, it goes from a panel, to the head, then back into that micro switch thing, that looks like it activates the fluid to move things in the cylinder! 

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