Clausing 1500 variable speed pulley problems

Hi all,

I've got a Clausing 1500 Turret Lathe that I can't get the speed to change.

I've been through the whole hydraulic speed change system, and it all *appears* to be working correctly, but I'm waiting on a manual.

It appears that the pulley half that moves (causing the speed change) is simply refusing to move.

Has anyone seen this? Anyone have experience with it?

Thanks,

Weyland

Reply to
Weyland
Loading thread data ...

With the spindle turning, run the change wheel all the way to high end..as far as the knob will go..and hold for 30 seconds, then turn it back to low speed. Repeat as necessary until the airlock goes away.

This hasnt been run in a while has it? This is a typical symptom of not having had the speed changed in a while.

Gunner

"If I'm going to reach out to the the Democrats then I need a third hand.There's no way I'm letting go of my wallet or my gun while they're around."

"Democrat. In the dictionary it's right after demobilize and right before demode` (out of fashion).

-Buddy Jordan 2001

Reply to
Gunner

Hi Gunner,

I don't believe it's an airlock, but I really do appreciate the reply. The are a few reasons I don't believe it's an airlock.

One, it actually functioned two days ago. Two, in diagnosing the problem, I replaced the hard tube with orings (that connects the two slave cylinders that act upon the pulley) with threaded fittings and hose.

Upon moving the change wheel you can clearly see the hose that's connecting the two cylinders now, bulge with pressure. (indicating flow and pressure, to me) As well, with the cylinders removed, the pistons move with *VERY* little effort. (maybe you might be able to tell me what the little threaded stud and lock nut are for on the retaining plate of the two slave cylinders?)

Two days ago when it worked, I was changing the speeds when the clock spring in the rear of the mechanism snapped. When it happened, there was a loud "POP~!" that at the time I assumed to be the clock spring itself, or the roll pin on the collar behind it that I found sheared afterwards as well. I've since fixed both, but cannot get speeds to change.

As for its history, yes, it indeed sat out in the Florida rain for some time before I got it.

Is there anything else you can think of for me to check? Are you familiar with how the variable pulley parts come out? I've managed to fix most all of the other problems it had and would really love to start using it for some things... :)

Thanks,

Weyland

Reply to
Weyland

Do you have a manual for that machine?

I do..and can send a copy.

Hummm what will happen on occasion..is that the varidrive will go out of adjustment, the belt will stretch and so forth..and the belt will go too deep into one of the pulleys..there is a non tapered section close to the axles and hang there, unable to be squeezed out as the pullies get pushed together. This can be determined by looking at the pullies and seeing if the belt is all the way inside of one or the other. The only way I know of to address this is to remove the upper pully side and spring and get all the slack you can..and rotate the belt by hand while working it out of the bottom pulley, if thats the one its stuck in.

Its a fairly expensive repair if the bottom pulley hydraulics has bit shit, and what a lot of guys do is replace the variable on both ends with a couple v belts and a VFD rated to handle the 7.5hp motor.

Im on the road, so cant look at my 1501 or the manual at the moment, so am trying to come up with this by memory. But Ill be home all weekend and will look.

Im on dialup on the weekends so cant really email you the manual..unless I go to a friends house, which I probably could do.

Give me a good email addy and Ill see about sending you the manual

its a prtty big file IRRC

Gunner

"If I'm going to reach out to the the Democrats then I need a third hand.There's no way I'm letting go of my wallet or my gun while they're around."

"Democrat. In the dictionary it's right after demobilize and right before demode` (out of fashion).

-Buddy Jordan 2001

Reply to
Gunner

Not yet. Waiting on a reply to my request for one from them.

That would be *GREAT*~! Thank you.

That sounds very much like one of the things I suspected from what I've seen and learned from poking around the last two days. I'm willing to bet a dollar that you're correct, here, Gunner.

Okay, I'll look at that and see what it entails while I'm in the shop tomorrow. Thanks for that bit of info.

I've seen reference to that during my searches on the web, but I simply can't afford that at the moment, and to be honest I don't think it's something *that* drastic so as to require me considering that option, yet. I'm betting you're right about the pulley going too wide and jamming the belt.

Great~! Thank you.

I appreciate it. If you manage it, you can send it to my first name AT solutions machining (one word, no space) with a dotcom at the end.

I've got lots of room in my mail so size shouldn't be a worry.

Thank you, Gunner.

Best,

Weyland

Reply to
Weyland

Just to update - I tried this many, *MANY* times without success.

I tried to get under there and see how to get one or the other of the pulleys to loosen up, but wasn't able to figure it out before needing to do other things.

Do you (or anyone for that matter) recall how to get to one or the other?

Thanks,

Weyland

Reply to
Weyland

Turned out to be the master cylinder. It had been hastily and poorly repaired *and* assembled incorrectly.

Replaced the piston oring, assembled corectly, and speed changes are working now.

Best,

Weyland

Reply to
Weyland

PolyTech Forum website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.