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1978 8" f4.5 Cave Astrola Restoration

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#1 Thaeland

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Posted 27 January 2019 - 05:57 PM

Seeing all the others who have restored their Cave telescope I decided to give mine new life.

So I will post here as I go through the estoration of my Cave Astrola 8" f4.5. The mirror is interesting as it has two seial numbers and two dates 3 months apart. The date I'm going with is Jun 1978. I am not the original owner. I traded it for my Meade 8" SCT at the 1987 Texas Star Party. I was told that before they had owned it is was in a university observatory.

So to start off with I'm posting my before pics.
85000fddce1af968d54978ea45c55e7b.jpgbf97d05f63f1b2e0ad2042b761871bbb.jpg2d31d3432df4775dc24f90c9f4cc5d1c.jpg

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#2 Thaeland

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Posted 27 January 2019 - 05:59 PM

Continued...7819b4c50acfc0abb377c9464581432e.jpgbb22a278d7e1d1b735687a9ee6422273.jpg5c1fc42cc888516198f0347d991d91a6.jpg

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#3 Thaeland

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Posted 27 January 2019 - 06:00 PM

Continued....5d55f3aa513cb0b2f0bf728d5401fa7d.jpgd3efd0b955db03d5680490f765db5d3f.jpg29185eb29cf0b0486bb39d092dc9295d.jpg

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#4 Thaeland

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Posted 27 January 2019 - 06:03 PM

Continued...1d4bfecf93891c62dce9f9329dd3bc71.jpg3125e567dd6688a6135b79877f78e0bf.jpg75d63694e5c349421479c565d8b8b97c.jpg

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#5 CHASLX200

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Posted 27 January 2019 - 06:04 PM

You got them little weighs on the rotating rings bars i see.  Only seen them one or two times and my 1975 10" Cave has them as well. You have lots of paint remover work ahead of you.  That Tube is not a Parks as in the later 70's they used any tubes they could find.  That has the wound paper look on the inside and could be a Meade Fiberlite tube. End rings also look Meade.


Edited by CHASLX200, 27 January 2019 - 06:08 PM.

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#6 Thaeland

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Posted 27 January 2019 - 06:13 PM

You got them little weighs on the rotating rings bars i see. Only seen them one or two times and my 1975 10" Cave with them as well. You have lots of paint remover work ahead of you.

Yes, it looks like it was used for astrophotography and that's why it's weighted like it is. I removed one of the main counter weights because it wasn't balanced but now it tilts the other direction. I"ll have to figure out how much weight I actually need when my equipment is mounted. Although I didn't have any problem taking photos during the recent Lunar eclipse.

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#7 Thaeland

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Posted 27 January 2019 - 06:22 PM

I finished stripping and painting the pier and legs today. I used a citrus based paint remover I've used on other projects. It works quite well and is better for the environment. I also added two coats of automotive clearcoat.b0f49f2811bf905b1763d040f0dbb461.jpg7b142fa1f567790099b020743edccc38.jpg7430e436119a906c4f4bdfada22ed89f.jpg0c325cdb48cef7bbd39e6d77999e9ee7.jpg

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Edited by Thaeland, 27 January 2019 - 06:25 PM.

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#8 Thaeland

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Posted 27 January 2019 - 06:29 PM

I could polish up the casters but they are significantly pitted and one is damaged. I found a replacement caster on Amazon that has the same specs. 1-7/16" stem length, 7/16" stem diameter, and 2 inch wheels.350e134d3c47a8d7d8b6c77ae07ab0c5.jpg

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Edited by Thaeland, 27 January 2019 - 06:43 PM.

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#9 CHASLX200

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Posted 27 January 2019 - 06:43 PM

I like that color on the legs and pier. I redid mine that was green when i got it.


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#10 Mikefp

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Posted 29 January 2019 - 09:32 AM

That was a fast paint job!     Looks great.   What color is the pier and legs?


Edited by Mikefp, 29 January 2019 - 09:35 AM.

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#11 Thaeland

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Posted 29 January 2019 - 04:32 PM

That was a fast paint job! Looks great. What color is the pier and legs?

It's Rust-oleum Hammered Light Blue. Lowe's and Home Depot carry some of the Hammered colors but not this one. I ended up getting it off of Amazon. It gives it the look you used to see on all the science equipment at school.

Jon

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Edited by Thaeland, 29 January 2019 - 04:37 PM.

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#12 TOM KIEHL

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Posted 29 January 2019 - 05:42 PM

Nice work and good choice . It will be pretty  when finished . You're like me , I get more over-spray on my hands than on the scope parts lol.gif waytogo.gif  


Edited by TOM KIEHL, 29 January 2019 - 05:44 PM.

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#13 Thaeland

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Posted 29 January 2019 - 06:44 PM

So the new casters arrived today and they look really close to the originals.a79b046be4430be208082b5d49addb26.jpg

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#14 TOM KIEHL

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Posted 29 January 2019 - 07:10 PM

So the new casters arrived today and they look really close to the originals.a79b046be4430be208082b5d49addb26.jpg

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Better than OEM waytogo.gif


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#15 Thaeland

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Posted 29 January 2019 - 07:11 PM

Here's the pier put back together with the new wheels.474122c3437f487e297a477fa437f1b9.jpg

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#16 Thaeland

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Posted 29 January 2019 - 11:14 PM

Nice work and good choice . It will be pretty when finished . You're like me , I get more over-spray on my hands than on the scope parts lol.gif waytogo.gif

Thanks... My youngest daughter was criticizing me for not wearing gloves. I said that's just the way I roll.....

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Edited by Thaeland, 29 January 2019 - 11:14 PM.

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#17 CHASLX200

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Posted 30 January 2019 - 06:21 AM

Here's the pier put back together with the new wheels.474122c3437f487e297a477fa437f1b9.jpg

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Maybe i should have painted mine that color.


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#18 starman876

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Posted 30 January 2019 - 07:54 AM

So the new casters arrived today and they look really close to the originals.a79b046be4430be208082b5d49addb26.jpg

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You are doing a first class restoration.waytogo.gif


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#19 CHASLX200

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Posted 30 January 2019 - 06:44 PM

Mine was green before i painted it. Still gotta paint the mount itself.

 

2ijsxdy.jpg


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#20 Thaeland

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Posted 30 January 2019 - 10:57 PM

Okay tore the mount apart tonight. Some parts were easy while the others were harder. Had to shorten an allen wrench to get to the set screws on the bearings of the RA shaft. Still debating on replacing all of the bearings. They are in good shape but it would be hard to get out the old grease without removing them first. New bearings for the RA shaft are $42 each. The other bearings for the declination shaft are only $11 each. a87cd6729e48c211db807018ba21b1c3.jpg3ec028d06829256439f3da487d256445.jpgf472ac0b0e8786f789b59c20c1d64331.jpg

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Edited by Thaeland, 30 January 2019 - 11:12 PM.

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#21 Thaeland

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Posted 30 January 2019 - 10:59 PM

Mine was green before i painted it. Still gotta paint the mount itself.

2ijsxdy.jpg

That looks good. I still need to find my leveling bolts.

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#22 Thaeland

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Posted 30 January 2019 - 11:00 PM

Had to use my gear puller.5e83628701aa021e9e5986b3ec7155bc.jpg

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#23 Thaeland

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Posted 30 January 2019 - 11:15 PM

RA motor is good and the plastic on the wiring is still pliable. Just need to replace the plug and wire to the motor.3a0d6dc8ab7c6ad679f64d80493e0ad4.jpg

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#24 Geo31

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Posted 31 January 2019 - 12:08 AM

I vote replace the bearings.  That was painful to look at.


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#25 tim53

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Posted 31 January 2019 - 10:16 AM

RA motor is good and the plastic on the wiring is still pliable. Just need to replace the plug and wire to the motor.3a0d6dc8ab7c6ad679f64d80493e0ad4.jpg

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While you're at it, replace the power chord with a grounded chord.  


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