DeWalt 7770 restoration - Router Forums
 
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post #1 of 6 (permalink) Old 04-24-2014, 02:03 PM Thread Starter
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Default DeWalt 7770 restoration

I have bought a DeWalt 7770 radial arm saw very cheap
but found it sticky and inaccurate and going out of plumb every
so often. I decided to strip it down to the bone and found
it clogged up with old oil and saw dust goo! Little bit of surface
rust on spring pins. It looks like a thorough cleaning and
polishing of contact surfaces might just do the trick!
Has anyone else done the same?
Regards from South Africa
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post #2 of 6 (permalink) Old 04-25-2014, 06:03 AM
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In situations such as this I have found Kerosene and spray cans of brake cleaner and engine starting fluid (ether) to be invaluable. Not environmentally friendly, they can soak through the skin, very flammable and some brands can remove the paint, but they do work in the instance you describe.

I do not envy the job ahead but your results should be worth it. - Baker
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post #3 of 6 (permalink) Old 04-25-2014, 08:48 AM
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Johann, I bought an old DeWalt mod 740, cleaned it up, replaced carriage and motor bearings, put on a new top, aligned everything, and now it is very accurate and a pleasure to use.
the following has more info:
http://www.johnsonphotographic.com/g...l_Arm_Saws.pdf
http://www.asiteaboutnothing.net/cr_radial-arm-saw.html (lots of refs)

Last edited by swarfmaker; 04-25-2014 at 10:15 AM. Reason: adding info
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post #4 of 6 (permalink) Old 04-26-2014, 01:09 AM Thread Starter
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Thanks so much. The info will help a lot!
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post #5 of 6 (permalink) Old 04-28-2014, 10:18 AM Thread Starter
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It is now really in a thousand pieces! Cleaned and needing
New carriage bearings. No wear and tear that I can see.
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post #6 of 6 (permalink) Old 05-05-2014, 05:13 AM
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When assembling use dry lube where possible, especially on the column. I used Just a puf.
Keep us updated
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