1995 Hyundai HIT-15s hydraulic pump

[rmi.chite]

Hello everyone,

My name is Cody and I work at a small CNC job shop in Northeast TN. We have a Hyundai HIT-15s and the hydraulic pump has died. I can't find one for sale anywhere on the internet. I was wondering if anybody here had one for sale or could point me in the right direction to locating one. The stickers on the pump are pretty much gone but I found what I believe is the right one but it had already been sold. It was listed on a consignment website so they couldn't or wouldn't help me find another one.

IL LIM Hyundai HIT-15S CNC Hydraulic Power Station Unit 2HP 220/380V 50/60Hz

 

[Pete Deal]

I don't know the years but have a look at Mazak QT-15 parts and see if you can see any that look the same. For a number of years the Hyundai HIT-15 and the Mazak QT-15 were mechanically the same machine.

 

[latheman78]

What do you mean by died? It does look like it is crammed in there, but you could possibly adapt a pump from another machine with external connections. Trying to find a direct replacement on an older machine probably isn't happening. Depending on how the current one functions you should have lots of options. If you yank it and tear it down be aware they sometimes aren't as simple to work on as one might think.

 

[DouglasJRizzo]

Same as Mazak QT as they were built under license.

 

[rmi.chite]

What do you mean by died? It does look like it is crammed in there, but you could possibly adapt a pump from another machine with external connections. Trying to find a direct replacement on an older machine probably isn't happening. Depending on how the current one functions you should have lots of options. If you yank it and tear it down be aware they sometimes aren't as simple to work on as one might think.

It had an issue internally where the key ways on both ends of the shaft that connects to the motor and drives the pump have been destroyed and repaired multiple times to the point where the shaft and motor seem to be in somewhat of a bind and it causes the motor to overheat if you have the machine on and running for a few hours.

I don't know the years but have a look at Mazak QT-15 parts and see if you can see any that look the same. For a number of years the Hyundai HIT-15 and the Mazak QT-15 were mechanically the same machine.

Thanks for the info!

 

[latheman78]

It had an issue internally where the key ways on both ends of the shaft that connects to the motor and drives the pump have been destroyed and repaired multiple times to the point where the shaft and motor seem to be in somewhat of a bind and it causes the motor to overheat if you have the machine on and running for a few hours.

Ok, sounds like it has been repaired multiple times, and it needs replaced. What does the hydraulic pump run? The reason I ask is what it runs and how those items are adjusted determine your options on fitting a pump that isn't original equipment.
On my set-up the incoming line pressure indexes the turret so wherever you set the turret at ends up being the max setting available for the chuck and tailstock adjustments.

 

[rmi.chite]

Ok, sounds like it has been repaired multiple times, and it needs replaced. What does the hydraulic pump run? The reason I ask is what it runs and how those items are adjusted determine your options on fitting a pump that isn't original equipment.
On my set-up the incoming line pressure indexes the turret so wherever you set the turret at ends up being the max setting available for the chuck and tailstock adjustments.

Yeah its been repaired twice by us. The last time the motor side got damaged so we had to go deeper into the motor to get the key to engage and its not working out.
The hydraulics on our lathe is what clamps the chuck at the minimum I'm sure it does more than that too.

 

[latheman78]

I have a spare in waiting for a leaky pump I have as I am not sure if I can get seals for it. I will end up adapting it to the machine getting some longer hoses and just sitting it behind the machine. I watched some videos on your machine model. Outside the chuck it probably runs the part catcher and tailstock if you have those. Not sure about the turret, you would have to check. The indexing I saw looked pretty quick and precise to be an old hydraulic set-up, but who knows. Anything that can provide equal pressure and volume should work, stronger is fine also, just crack it open slowly to not blow out seals in the machine.

 

[wmpy]

If you run out of luck finding a used one, you might consider replacing the entire hydraulic unit. We did that when the Parker hydraulic pump went out years ago on one of our lathes. We had the local Parker distributor come out, and they got us us hooked up with a new model as the old one was obsolete. I would give your local hydraulics distributor a call, or contact All World Machinery. They sell all kinds of parts for machine tools, including hydraulic units.

 

[rmi.chite]

If you run out of luck finding a used one, you might consider replacing the entire hydraulic unit. We did that when the Parker hydraulic pump went out years ago on one of our lathes. We had the local Parker distributor come out, and they got us us hooked up with a new model as the old one was obsolete. I would give your local hydraulics distributor a call, or contact All World Machinery. They sell all kinds of parts for machine tools, including hydraulic units.

Thanks for the info. Seems like finding one of these is going to be harder than I thought. I emailed them the information on the pump I'm looking for.

 

[latheman78]

If you run out of luck finding a used one, you might consider replacing the entire hydraulic unit. We did that when the Parker hydraulic pump went out years ago on one of our lathes. We had the local Parker distributor come out, and they got us us hooked up with a new model as the old one was obsolete. I would give your local hydraulics distributor a call, or contact All World Machinery. They sell all kinds of parts for machine tools, including hydraulic units.

All lot of models out of stock, it is amazing how far the supply chain disruption has reached.
Those prices have me glad I saved one off a machine I scrapped. If I was the OP I would start looking for a used one, considering the value of his machine with a dead pump. His machine looks like it would be in the same value range as the one I have with the leaky pump. Those pumps cost in the vicinity of what the machine is worth. There are a lot of items that can go on machines where good used can be bought at a fraction of new.

To the OP, did you check to see what indexes the turret?

 

[rmi.chite]

All lot of models out of stock, it is amazing how far the supply chain disruption has reached.
Those prices have me glad I saved one off a machine I scrapped. If I was the OP I would start looking for a used one, considering the value of his machine with a dead pump. His machine looks like it would be in the same value range as the one I have with the leaky pump. Those pumps cost in the vicinity of what the machine is worth. There are a lot of items that can go on machines where good used can be bought at a fraction of new.

To the OP, did you check to see what indexes the turret?

I believe its the hydraulics that index the turret. The owner of the shop is out of town and wanted me to try to find a pump/motor combo but he's the one that would know for sure.

The machine is in pretty good condition considering its from 1995 minus our current hydraulic problem. The area around the hydraulics just looks like crap because of our on going issues with it.

 

[latheman78]

I keep forgetting, I can just either open a door or stand and look at pretty much what does what on my similar machine. Unless needed for safety or to protect components from coolant, covers end up on a shelf, you can easily see the hydraulic lines going to the turret.
Saying the pump costs the same as the machine's value wasn't a pot shot on it's condition.
I am in the same boat. Is the tank the pump sits on easily removable? I just looked on Ebay and there are a lot of used motor/pump combos under $1k, that would probably work.
There was even a big ugly green one with a tank for $350. Those are from machinery sellers that charge top dollar. The condition of your pump seems kind of rare. Most end up leaking like mine or have an electrical failure in the motor. Even if
I was lighting cigars with $100 bills I would not put a $8k pump on a machine worth $10k at best, but that is me.

 

[rmi.chite]

I keep forgetting, I can just either open a door or stand and look at pretty much what does what on my similar machine. Unless needed for safety or to protect components from coolant, covers end up on a shelf, you can easily see the hydraulic lines going to the turret.
Saying the pump costs the same as the machine's value wasn't a pot shot on it's condition.
I am in the same boat. Is the tank the pump sits on easily removable? I just looked on Ebay and there are a lot of used motor/pump combos under $1k, that would probably work.
There was even a big ugly green one with a tank for $350. Those are from machinery sellers that charge top dollar. The condition of your pump seems kind of rare. Most end up leaking like mine or have an electrical failure in the motor. Even if
I was lighting cigars with $100 bills I would not put a $8k pump on a machine worth $10k at best, but that is me.

Yeah for sure. The boss told me to stay under $1k if I can. We aren't looking to put lipstick on a pig here haha.

 

[pcasanova]

I have a pump that was a spare for a machine long gone. rexroth unit 20mm shaft, 80mm boss a 4 bolt pattern of about 75mm (not bolt circle, bolt circle about 103mm) yours pay shipping if you think this would adapt

 

[latheman78]

A free pump, and a nicely made German one to boot! With some Googling it can be driven with a minimum 900 rpm motor and a max of 1800. I found a step file but it is even too big for me to e-mail. If I had this I would just buy a new 3 phase 1800 rpm motor and use Lovejoy couplers. You will probably need to make a custom mounting plate. I didn't find the HP for the motor requirement. You might be able to cobble something up to use your old one.

 

[rmi.chite]

A free pump, and a nicely made German one to boot! With some Googling it can be driven with a minimum 900 rpm motor and a max of 1800. I found a step file but it is even too big for me to e-mail. If I had this I would just buy a new 3 phase 1800 rpm motor and use Lovejoy couplers. You will probably need to make a custom mounting plate. I didn't find the HP for the motor requirement. You might be able to cobble something up to use your old one.

Our old motor is messed up from the key way being destroyed up inside the motor but yeah that seems like a great plan.