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Old Girl 1978 Roper


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#136 MH81 ONLINE  

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Posted December 10, 2014 - 07:39 AM

The object with the heat is to warm the bearing part (swells) and not the shaft (stays the same size). This will give you a .000001" gap that wasn't there before and allow for motion.

If you heat it all, the parts all swell at roughly the same rate.
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#137 larrybl OFFLINE  

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Posted December 10, 2014 - 09:03 AM

I have an out of town meeting tomorrow, I'll work on this Friday and the weekend. I will try the MAP gas on the berring after I release the pressure and re-apply it. Hope this works as the last time these mandrills were available was 10 years ago. I was thinking of another option of looking into a CNC place that might be interested in making a few of these, but I expect that would be out of my price range.



#138 MH81 ONLINE  

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Posted December 10, 2014 - 10:56 AM

I have found that MAP gas is better than no gas, but not as fast as acetylene. If the map doesn't work,see if you have a buddy with an acetylene set.


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#139 JBRamsey OFFLINE  

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Posted December 10, 2014 - 10:05 PM

Keep the pressure on and heat it a little at a time with an acetylene torch. Patience is key.

#140 larrybl OFFLINE  

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Posted December 10, 2014 - 10:14 PM

I think I will seek professional (someone with a 12 ton press) help, before I ruin these beyond repair.

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#141 larrybl OFFLINE  

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Posted December 11, 2014 - 05:01 PM

I stopped at a local machine shop today, I will be dropping these off tomorrow to meet with their 25 ton press. :rolling:  


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#142 larrybl OFFLINE  

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Posted December 11, 2014 - 08:22 PM

You know, when you purchase a used LGT you need to think of it as a "Stock Market" item. You can invest $$$ and hope to get a good return on your investment, or as I am doing, when you have $$$'s invested make sure the function you want this investment can do (ie. Cut grass) can perform this function before investing more $$$'s. Otherwise, realize your losses, and try and recoop your investment by parting it out. I am not at this point yet, but just thinking out my options. 


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#143 KennyP ONLINE  

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Posted December 12, 2014 - 06:30 AM

Your investment will be the fun of using it in the years to come with out major issues!



#144 MH81 ONLINE  

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Posted December 12, 2014 - 07:18 AM

That machine has to much potential for that IMHO.
And more than one Grandpa memory too...
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#145 johnwesley OFFLINE  

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Posted December 12, 2014 - 09:43 AM

mandrill pulleys, each one has two 3/16 hex screws inset to secure the pulley to the shaft.  :wallbanging:  .Why I don't know as they are also keyed and secured with 27mm nuts

larrybl, you set bearing preload with the nut,just like front wheel bearings, then you tighten the set screws to keep the nut from turning.

johnwesley


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#146 larrybl OFFLINE  

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Posted December 12, 2014 - 01:38 PM

mandrill pulleys, each one has two 3/16 hex screws inset to secure the pulley to the shaft.  :wallbanging:  .Why I don't know as they are also keyed and secured with 27mm nuts

larrybl, you set bearing preload with the nut,just like front wheel bearings, then you tighten the set screws to keep the nut from turning.

johnwesley

Now that is some good info! Thanks. The two outer mandrills are at the machine shop, I hope to hear from them before the end of the Day.



#147 larrybl OFFLINE  

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Posted December 13, 2014 - 11:17 PM

The mandrills are still at the machine shop so I am on a semi hold on doing any more work on the deck. I have a bunch of "home work" this weekend. I need to write my City job description as I don't have one right now, and develop several radio templates for Baylor PD as they are being added to the City's radio system next week. 

Other than that I did manage to work in a good life experience for my Grandson, How to air a tire, and check the pressure. He is going to help his Mom check her car tires tomorrow. :thumbs:   

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#148 MH81 ONLINE  

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Posted December 14, 2014 - 08:55 AM

You will thank yourself for this.
When Ryan was 10 or 11, his Mom called me at work with a low tire pressure light on her dash. She wasn't calling me to come home and rescue her or to have one of those conversations where I try to explain what a tire pressure gauge is, but to tell me my son was already on it. Had the gauge out, found the culprit, was pumping it up as we spoke.
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#149 larrybl OFFLINE  

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Posted December 16, 2014 - 10:08 PM

Outer mandrills have been at the machine shop sense Monday, I called them today and they said they think they can get the races out????? I think they mean the bottom bearing with the cup assemble, the races pop right out.  I check back with them tomorrow.


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#150 larrybl OFFLINE  

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Posted December 19, 2014 - 11:03 PM

Had a bit of a scare today, but it turned out ok. I decided to visit the machine shop to see if they had made any progress removing the bearings, I was becoming concerned about the time it was taking. When I walked in and asked, one of the guys behind the counter started shaking his head. They were able to press the shafts out (really straining the 12 ton press), but couldn’t remove the bottom race/bearing without destroying the metal seal. The problem seemed to be that the shaft had been “burred” and that was why the bearing were so difficult. Neither of us knew why they were this way, the center mandrill wasn’t. Anyhow, They gave them back to me, and said “no charge”! :dancingbanana: 

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