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Vintage Sun Tune Up, Testers, Scopes, Analyzer, Distributor Thread

Discussion in 'The Hokey Ass Message Board' started by Flathead Johnny, Oct 14, 2013.

  1. That is a beautiful machine and exactly what I would like. My problem with that one, is that the shipping and customs would be a killer.
    Thanks for posting it, maybe someone closer will see this and pick it up.
    loudbang and cactus1 like this.
  2. jcrubin
    Joined: Sep 2, 2017
    Posts: 1


    I realized I showed up late to this one, however I just finished restoring a SNAPON MT-665 automotive analyzer for which there exists no documentation or schematics. It took months to accomplish. I have posted a collection of 9 movies documenting the restoration on youtube if anyone is interested.

  3. Joe H
    Joined: Feb 10, 2008
    Posts: 1,377

    Joe H

    Here is my dad's old Allen distributor machine. The tach didn't work, so he improvised.

    Attached Files:

  4. Good stuff!
    loudbang likes this.
  5. Karlos_the_spy
    Joined: Sep 9, 2017
    Posts: 1


    These are certainly nice pieces of test equipment. Unfortunately I do not have a manual for the Sun 920 but I did find a manual for a VAT-20 which appears to have the same features as my VAT-26. The operation of these is pretty straight forward and I have owned and operated these since 1983 without a manual. If you know of a manual I would love to look at it and see if there are engine diagnostic steps spelled out.

  6. Blackadder76
    Joined: Nov 28, 2017
    Posts: 1


    I'm new here. Just purchased a Sun TUT 1001, build in 1979. Came with a lot of equipment. How can I be sure that all of that is part of my SUN? Are there catalogs for that? Are there any spare parts, because it has a broken connector in the arm. And what kind of filter do I need for the CO tester? Just have a manual with it, no parts list.
  7. gweedo5150
    Joined: Aug 13, 2009
    Posts: 1


    Hi Guys. Awesome thread and some good info. I picked up a SUN Standard Distributor Tester (Model SDT) a couple years ago. It is all there and I started disassembling it to try and see if there are any obvious problems (which I've found a few so far). I did get the drive motor running (cool vintage GE A-C motor). The vacuum pump motor seems dead, best I can tell is that it is a 6V DC motor - having trouble finding much info about it. That leads me to this question. I've seen a fair amount of info for the 400 and 500 series, but does anyone know where I might be able to come up with a wiring diagram and/or service manual for the SDT model? Any help would be greatly appreciated. Thanks!

    IMG_20160412_172739207.jpg IMG_20171129_185335019.jpg IMG_20171201_104911576.jpg
    Dog_Patch likes this.
  8. Truck64
    Joined: Oct 18, 2015
    Posts: 5,323

    from Ioway

    The important thing is never operate or even plug in the unit unless and until the DC power supply has been squared away. The electrolytic capacitors and waxed paper coupling and bypass should first be replaced, along with any resistors out of spec. Vacuum tubes and other components are pretty rugged in these applications but they will get smoked drawing excessive current if this is not done. AC transformers are sometimes proprietary and $$ if you can even find one, except maybe by cannibalizing another unit. Maybe you know all this already, but I'd hate to see a cool unit get trashed! "Plug it in and see if it works" is really bad stuff on vintage electronics.
    Last edited: Dec 8, 2017
  9. Working on this one that belongs to @chopnchaneled today. Its running now but the dwell and RPM meter need new caps. After spending this much time on it, hate to not sand blast it and restore it all the way ....


    This is how silicon diodes changed everything - 2 little diodes compared to the equivalent tube diode
    IMG_0168.JPG IMG_0169.JPG
    Replacing the tube with 1960's diode technology

    IMG_0171.JPG IMG_0173.JPG IMG_0194.JPG
    The dwell meter is still off - needs caps
    IMG_0198.JPG IMG_0199.JPG IMG_0202.JPG IMG_0203.JPG
  10. 51 mercules
    Joined: Nov 29, 2008
    Posts: 3,599

    51 mercules

    Here's a pic of my old scope it came from a service station in Rubidoux, Ca at the corner of Pacific and Mission Blvd.

    Attached Files:

  11. Truck64
    Joined: Oct 18, 2015
    Posts: 5,323

    from Ioway

    Right, but that tube would last practically forever in that application wouldn't it? At least with fresh power supply caps installed. Tube rectifiers are slow to ramp up voltage too, sort of a "soft start". Semiconductor diodes are instant on, though maybe it doesn't matter here. I'd have left it just because. Thanks for the pics!
    loudbang likes this.
  12. The diodes come with the kit - didn't really think about leaving it in place but I guess you could. The 6v battery that was used and has some external alligator clips, was replaced with a laptop battery charger. I don't have a schematic for this one, was wondering if there's a way to eliminate the 2 D cell batteries in the dwell and tach.
    loudbang and catdad49 like this.
  13. Truck64
    Joined: Oct 18, 2015
    Posts: 5,323

    from Ioway

    I'd bet a set of good quality flashlight batteries would last about forever in that application. The "Industrial" type. Getting harder to find commercial alkalines that won't leak though.
    Dog_Patch and loudbang like this.
  14. primer4life
    Joined: Jul 8, 2014
    Posts: 2


    32AB3D46-87C7-48E2-8C41-C2AB10FEC5F6.jpeg EBADF646-F7FC-4991-92DC-36B6DCC5A8E3.jpeg 9C0CC659-F69B-44FC-8C37-2AA0E46DE712.jpeg 2FE5006B-2151-4DC6-9087-BBCF9ECF06B6.jpeg 9183E478-381E-4B38-8703-DDD74FAC64E6.jpeg This is the machine I picked up a few weeks ago. I’m in the process of cleaning it up. It says the model is a UDT-M1. I believe it is from 1958. My plan is to use it but I have no manuals. I’ve seen several people on here that might have a manual that could be close. I think I may have to have a MDT manual for the distributor part and an engine analyzer for the other parts but if there is anyone that can help I could really use it.
    Truck64, Dog_Patch, loudbang and 4 others like this.
  15. oj
    Joined: Jul 27, 2008
    Posts: 6,371


    That looks like a military one, impressive machine for sure.
    loudbang likes this.
  16. That is a machine with great potential. I hope your restoration goes well. I have some information for a much smaller Sun machine, and although I doubt it would be helpful, I would have no problem sharing it.
    loudbang likes this.
  17. If you are having a problem obtaining components, I have a lot of pulled military grade high voltage electrolytic capacitors. I also have a bunch of octal tubes. If you need something like that, I might be able to help you. I have the ability to check the components, including a mutual conductance tube tester, so there would be no guess work as to the quality.
    loudbang likes this.
  18. primer4life
    Joined: Jul 8, 2014
    Posts: 2


    B65374FA-159E-4B35-95E0-E421D2DC9BBB.jpeg I actually found a book on eBay. Thank goodness no one throws anything away like I don’t.
    loudbang, Truck64 and WTF really like this.
  19. Well I can sort out most of the knobs and dials on this machine, but do you have any idea of what the function of the "COMBUSTION BOOSTER" is? o_O This rig has about three times as many gauge modules as most distributor machines I've seen or laid hands on. :rolleyes:
    loudbang likes this.
  20. tlowe
    Joined: Oct 22, 2006
    Posts: 157


    Got a 504 that is used weekly in my shop. P1050444.JPG
  21. Kustomkid
    Joined: Nov 21, 2010
    Posts: 531

    from Montana

    The combustion booster has a probe/sniffer that slides in to the tail pipe for lean/ rich. If you have all the parts and it works, it’s kinda handy to use.

    Sent from my iPhone using H.A.M.B.
    Bowtie Coupe, ClayMart and loudbang like this.
  22. Thanks for the added info and for making me go back and look things over more closely. :rolleyes: Looking at the above pictures again, that's starting to make some sense. The lower combustion Booster panel with the knobs on it also has what appears to be a hose port for the tailpipe probe or sniffer. The panel above that looks to have a small fan behind the glass window which could supply a vacuum source for that hose port.

    The gauge at the top of the stack is hard to read but I think it says "Combustion Efficiency" and the scales probably read HC and/or CO. This setup would give you a distributor machine with some of the added functions of the full size Sun Engine Analyzer, but without some of the bulk of the big-ass scope module and all its controls.
    Kustomkid and loudbang like this.
  23. sportster-bob
    Joined: Oct 30, 2016
    Posts: 18


    Anybody know of a source for replace decals for vintage Sun cabinets? I'm restoring one from the 50's and need replacement decals for the base cabinet. Especially the one that says "6 and 12 Volt".
  24. @sportster-bob you might try the guy that restores them? I think it is Paramount something or other?
    loudbang likes this.
  25. Flathead Johnny
    Joined: Jul 26, 2011
    Posts: 744

    Flathead Johnny
    from MA

    Glad to see my thread is still kicking! Its been a while since I checked it out.
    loudbang and egads like this.
  26. Truck64
    Joined: Oct 18, 2015
    Posts: 5,323

    from Ioway

    I'd like to see a retail price sheet for those big Sun machines and Allen distributor testers from 1945, 1955, 1965, right in there.

    What did they cost when new? Had to have been a major cost, though any big shop had to have one. For a while after they became "obsolete" many of them were dumped unceremoniously at the landfill, I'll bet. Couldn't give them away. They take up a lot of space and the WAF is very low.

    I barely remember as a little kid being on vacation with the family in Colo. and we had some kind of car trouble, and the shop had a couple of those Sun machines. I thought I'd stumbled onto the real Wizard of Oz or Dr. Frankenstein. Stay away kid, ya bother me.
    loudbang likes this.
  27. Uncle Mark
    Joined: Jul 3, 2018
    Posts: 12

    Uncle Mark

    Hey all, I'm a new member here and got some great answers on a thread I started on the model "A" Mallory YL series distributor.

    I have a working CCT-10 and both manuals, I'll scan them and put them up here soon.

    I did scan one manual years ago and sent it out on the net to a gentleman so I've always wondered if the one out there now is from my scans as there was not a manual on the net at the time I did it.

    I'm not going to sell copy's, it'll be free of charge, the first is manual #692-245
    And the second is #692-634.

    I paid $20 for the working tester and manuals at a swap meet in the late 90's.

    Can't beat that.

  28. I'd think that price sheets for these machine are fairly rare. Rather than being purchased outright, probably 80% or more of them were leased. When the leases ran out, Sun technically retained "ownership" of the off-lease machines and did their best to crush or otherwise disable them. :( I imagine Allen and the other vendors did likewise. They didn't want the used machines out in the market where they would dilute the potential leases, or sales, of their new equipment.
    loudbang and Truck64 like this.

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