Oil pump for a Harig Super 612

M

MarkRoe

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I have a Harig Super 612 with a dead oil pump. Can anyone recommend a replacement short of getting a factory version? I've heard others using a Little Giant pump on other forums as a replacement but the posts are old and no one provided specific info.

I am looking to just replace it with something simple that runs 110v and I can plug up when using the SG.

I appreciate an suggestions on this.

Thanks,

Mark
 
It's a manual SG and only has the one pump for the way oil. I ended up tearing the old pump apart, cleaning out the lines and verifying that it is now working.
 
Well I actually do have a dead pump (way oil) on my Super 612. Are there any thoughts on how to best get around the purchase of a $512 replacement pump on my $600 Harig? Must be a nice low pressure equivalent pump lurking out there somewhere...

This is what I have:
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I'd take the pump apart. Can't be anymore than a rotor vane pump. Might be a easy fix. Take that cover off that has the fittings on it a lot will be explained once off. Where does the line go that has the needle valve on it?
 
I already had it apart to clean the internal screen. It appears that the motor section is potted in order to remain oil resistant. Of course I did all that before I knew it was dead so maybe I will pull it out once again to see if I can get any further. I suspect it is an electrical issue since it doesn't make a sound (like the impeller being stalled etc)... The line with the valve is the one that feeds the saddle ways. You regulate the flow on that circuit to prevent over-running the drains and having oil all over the place. The other line goes to the top reservoir that lubricates the bevel gears for the Z axis and also lubricates the spindle ways.
 
So what style of pump is it a rotary,piston?
It’s not a bad idea to have it apart and see actual armature spin or not?
My pump is a piston type and the motor spins like 3rpm.
 
I wound up pulling the pump today and broke it down as far as possible. The pump is a rotary vane pump but just as I thought, it is vacuum potted in some plastic resin. I verified that the pump has open windings because I get infinite impedance on the power cable running into it. Since I had nothing to lose, I started breaking in to the resin potting to see if I could get a look. I found that oil had migrated inside the resin coating and probably screwed up the motor inside.

Does anybody have any clever ideas on how I can repurpose something else to fit the bill? A replacement pump is more expensive than what the grinder is worth.
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Oil clearly migrated under the failed resin potting...
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Does the motor have any type of markings to indicate rpm or pressures? I have a simply pond pump that’s that size. Can be bought at the big box stores. I use mine for coolant don’t know how the pressures would be with a oil guessing that a metering valve can take care of that.
Can the pump be dismantled from the motor base and be reused? Figure out the rpms and reconfigure a motor to suit the pump. May have to extend shaft so motor is out of oil.
 
This motor has some fried windings that I don't seem to be able to get at without really beating it up. The potting resin is super tough stuff so it puts up a really good fight. I am thinking this might work with the appropriate valving to partition the flow appropriately. Available from Grainger and it is suitable for kerosene, light oil etc...
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No markings on the original pump except "230V 60Hz"
 
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