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January 21, 2019, 09:52:09 am
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How do I change the belt in my arbor?

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Author Topic: How do I change the belt in my arbor?  (Read 983 times)
redrockrods
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« on: August 09, 2009, 09:37:31 pm »

my new pulley requires a little longer belt to be used. I'm having trouble figuring out how to dismantle the arbor  and removing the bearings, hat, collar and retaining ring from the shaft to get the new belt in place. Does anyone have experience doing this and can give me some directions?

Thanks
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Bluesssman
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« Reply #1 on: August 09, 2009, 09:49:39 pm »

I would love to help but I need more information. Post some pictures of your unit and let's see what I can do to help...


Gary
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redrockrods
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« Reply #2 on: August 09, 2009, 11:17:07 pm »

I'm afraid that I've made a mess of things...  I couldn't figure out how to remove the retaining ring properly, and ended up breaking it off on the right side of the arbor...hope it's replaceable... after that I removed the screws  to the bearings collar holding it to the frame and loosened the hex screw that secured the locking collar in place on both right and left sides. Then, because I wanted to do a thorough job of it, I proceeded to whack the right end of the arbor shaft with a rubber mallet to try to push the arbor shaft through...well, I got about 3 inches and then I think the bearings meet the grove where the retaining ring was and now it's stuck. So before I run out to my car and retrieve my sledge hammer....help!

Here's pictures:

1. right side of arbor, showing locking ring that is now in pieces...
2. the pulley and bearings
3. left side of arbor, still has locking ring and unmovable steel spacer, permanently rusted onto the shaft...


* 2009_0809_165935.jpg (45.27 KB, 940x705 - viewed 21 times.)

* 2009_0809_191944.jpg (41.42 KB, 940x705 - viewed 24 times.)

* 2009_0809_191953.jpg (41.99 KB, 940x705 - viewed 25 times.)
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Taogem
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« Reply #3 on: August 10, 2009, 08:22:16 am »

I don't know why, but having a bit of a time figuring out what I am looking at.

Can you show one more pic showing the entire rear of the unit. I think this is one of your expando drum units?

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Bluesssman
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« Reply #4 on: August 10, 2009, 10:36:57 am »

I would start with a can of good penetrating oil and use it on everything. You might need to let it sit a while and even possible reapply. The area that you think is stuck on the retaining ring groove needs to be addressed. You will need to move the shaft back a bit so you can file off any edge or ridge on that grove. I can understand your frustration. Could you give me a shot of the overall unit and then progressively closer ones. We can get you through this!!!!


Gary
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redrockrods
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« Reply #5 on: August 10, 2009, 03:44:26 pm »

I'm afraid I picked a bad time to start breaking my equipment. I leave for a business trip to CT tonight.  I'll take a few more pictures before I leave and post them so we can mull them over the next couple days. I've given everything a good coating of wd40 to hopefully it will loosen up some of the rusted parts. in a way, it's good that I'm dismantling this, as all of the rubber grommets and gaskets need to be replaced as well. There's some big marks on the arbor shaft as well, looks like someone took some pipe wrenches to it at some point thinking that they screw off and were stuck...

.Any ideas where I can get replacements for the rubber grommets and  gaskets? I wonder if I can get parts directly from lortone.
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Bluesssman
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« Reply #6 on: August 10, 2009, 07:51:18 pm »

Once you get everything apart, I will help you find parts. I realize you are going out of town, so this is not a good time to say that WD40 is not a great penetrating oil...

We will get you through this as painlessly as possible! This is the stuff I really enjoy...


Gary
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redrockrods
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« Reply #7 on: August 10, 2009, 11:24:31 pm »

Thanks Gary, I appreciate it.

I had my doubts about the wd40, but I didn't have a chance to track down some pb blaster before I left. I did take a few more pictures that should help. I'll post those tomorrow as I get a chance between flights.

My arbor seems to have been pieced together from one that was rusted out. much of it has been re-fabricated out of steel square tube and sheet, and riveted together. If I had known it was like this before I bought it, I would have waited for something else to come along.  Oh well, live and learn.

I did manage to whack the arbor shaft back and free it up again. nothing like brute force to relieve post flight stress. The bearings are no longer stuck on the locking ring channel.

here's something interesting I noticed: the arbor has a 4" pulley on it...lortone's specs specify a 2.5". The motor had a 2" pulley on it... what the original owner was thinking when he put this together? I'm wondering if I should pick up a couple 2.5" pulleys to outfit this with so I can get it back to original specs. I've got 2 4" pullies now, but the smaller ones would let me keep using the existing belt.  I bought a 44" belt from home depot but I think it's going to be too big, even with 2 4" pulleys. 
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Taogem
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« Reply #8 on: August 11, 2009, 10:44:46 am »

I'm wondering if I should pick up a couple 2.5" pulleys to outfit this with so I can get it back to original specs. I've got 2 4" pullies now, but the smaller ones would let me keep using the existing belt. 

Yes, I would swap em out with a couple of 2.5" pulleys.. 

Have a good flight  :)
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redrockrods
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« Reply #9 on: August 11, 2009, 07:54:04 pm »

George, I think I will get a couple 2.5" pulleys.

Here's more pics:

http://www.flickr.com/photos/38308319@N07/?s
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Taogem
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« Reply #10 on: August 11, 2009, 10:48:27 pm »

From what I can see, it appears you have no choice but to get that darn unmovable steel spacer off..

I just don't see any way around it !

Hmmm....

Your not going to be able to take that to the shop and expect them to jimmy that in a way so as to use a press to remove it.

I wonder if a large gear or pulley puller set would be able to get a hold of that?

That puppy just has got to come off... 
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Bluesssman
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« Reply #11 on: August 12, 2009, 09:43:44 am »

If I could not get the steel spacer to move, I would just carefully cut the spacer off with a disc grinder. Then clean the area with fine sand paper.


Gary
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Dr Joe
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« Reply #12 on: August 12, 2009, 05:22:08 pm »

After it has sat with PB for a week, tap it all over the sleeve to help break up the rust, clean off the excess oil, then cool the shaft with ice for 20 minutes to contract the shaft diameter, after this, heat the sleeve quickly with a torch (propane is fine) to expand it and gently  tap it off the shaft with a drift or cold chisel (a slide hammer would be a good choice in this instance.

All this could take several attempts but is the least damaging to the equipment.

Next could be cutting the sleeve with a dremel tool and prying it open with a screwdriver.

When this whole ordeal is over, I have one word for you..... MAINTENANCE  ;).

I hope everyone else out there is watching your efforts and  will be preemptive with there equipment.

Dr Joe

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Taogem
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« Reply #13 on: August 12, 2009, 07:14:54 pm »

Just one more thought...

To get a nice even banging on it, you might try a piece of pipe slightly larger than the arbor yet small enough to hit that spacer..

Might be better than chisels and hammers directly on that.

You will get a much better and even bang for your each hammer stroke...

Just a thought  :)
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redrockrods
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« Reply #14 on: August 12, 2009, 08:37:04 pm »

After it has sat with PB for a week, tap it all over the sleeve to help break up the rust, clean off the excess oil, then cool the shaft with ice for 20 minutes to contract the shaft diameter, after this, heat the sleeve quickly with a torch (propane is fine) to expand it and gently  tap it off the shaft with a drift or cold chisel (a slide hammer would be a good choice in this instance.

All this could take several attempts but is the least damaging to the equipment.

Next could be cutting the sleeve with a dremel tool and prying it open with a screwdriver.

When this whole ordeal is over, I have one word for you..... MAINTENANCE  ;).

I hope everyone else out there is watching your efforts and  will be preemptive with there equipment.

Dr Joe

.

Thanks Doc,  I'll definitely hit it with the PB next week and see if I can get it off.  would dry ice be over kill for the hot/cold treatment?

assuming I get the spacer off, what's the recommended way for dealing with those locking rings? is there a proper way to remove them without breaking the darn things?

Do you guys thing I should do anything to the arbor shaft to attempt to address the deep gouges left by pipe wrenches? I'd like to know what the previous owner was thinking when he put the wrenches to it...
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