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Subject: Front Mount Distributor Won't Time Properly

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Jock(OR)    Posted 06-14-2020 at 23:11:37 [URL] [DELETE]        [Reply] [No Email]  
  • Front Mount Distributor Won't Time Properly
  • I have a front mount distributor from a 2N that is giving me problems. I believe it is the original distributor to the tractor my Grandfather bought new in 1945. I am sure my Father put a new breaker plate in it during the 1970's. The advance weights have coil springs, so I suspect that the shaft has been replaced along the way.

    I just replaced the front and rear bushings. The old ones were pretty loose, and I thought that they were responsible for my scattering misfire, as well as the fact that the breaker plate had to be adjusted as far retarded (spark late) as possible.

    Now I have the opposite problem. With the breaker plate as far as advanced (spark early) as possible, the points open 3/8" after the mounting hole (1/8" late) with the points set at .015".

    The advance weights seem a little loose, but the springs retract them all the way. The slots in the wings of the shaft are beat out so the pins can move sideways. The bushings now have no slop, so the shaft cannot move sideways. The point gap is pretty consistent on all four lobes.

    The points (Echlin) have only about 20 hours run time on them, and seemed in good shape, so I didn't change them. Perhaps the rubbing block is worn?

    Jock(OR)    Posted 06-17-2020 at 02:48:48 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Front Mount Distributor Won't Time Properly
  • Update: Today I got back to the distributor. I changed the point set, and it made no difference in timing. I have three new CS35 point sets, some dating to 1995, and all three measure the same for rubbing block-to-contact geometry. The used set is also identical.

    I decided that I may have distorted the bushing mount on the point plate when I replaced the bushing, so I carefully nudged the bushing mount in the direction of the rubbing block. I got positive results right away, with the timing coming into spec. with the point plate adjuster at the bottom edge of its travel. I quit there, rather than risk binding things up.

    As an aside, I discovered that the curved, rectangular, "washer" with the timing marks on it is missing, so I will be putting up a wanted ad for one. I can't find anyone that has a new one for sale. The parts catalog shows it in the diagram, but not in the listings. It should be 18-12174, which has been superseded by 59A-12182A. I may have to make one from scratch.

    Tim Daley(MI)    Posted 06-15-2020 at 05:34:45 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Front Mount Distributor Won't Time Properly
  • HiYa Jock-
    I’m leaning towards the breaker points are bad. ECHLIN used to be one of the few reliable brands but no longer are unless they fixed the problem recently. A year ago I spent a week with my late friend, Farmer Dan Howe, and we went thru a dozen or so front mounts to rebuild, time, and set correctly. What we discovered was that all the *ECHLIN sets were junk –points were off location and couldn’t be gapped right. Lot numbers on the boxes were all over the place and purchased from different suppliers so we don’t know how long they had been like that. What we concluded was there are only three reliable point brands made today. They are: Standard Ignition (Blue Streak); CNH (Case-New Holland); and TISCO. The latter uses the plastic rubbing block but proved reliable, and the other two use the OEM type phenolic rubbing block. ECHLIN also has the phenolic block and that was one reason why they were a good choice.

    Part numbers:

    1. POINTS:
    Standard Ignition (Blue Streak) – FD-6769X
    CNH – 87744524
    TISCO – ATK6FF
    ECHLIN CS-35 (*see note)

    2. CAP:
    ECHLIN - #FA350 or STANDARD IGNITION - #FD-126

    3. CONDENSER:
    ECHLIN - #FA-200 or STANDARD IGNITION - #FD-71

    4. ROTOR:
    ECHLIN - #FA-300 or STANDARD INGNITION - #FD-104, TISCO KIT Includes rotor.

    5. GASKET KIT:
    SPAREX #S.60308

    6. 6V COIL:
    IC670

    7. BALLAST RESISTOR:
    # ICR40

    8. SPARK PLUG WIRES –COPPER CORE – JUST8N’s

    9. SPARK PLUGS:
    AUTO-LITE 437 (216) or CHAMPION H12 (512)

    10. CAM LUBE:
    STANDARD IGNITION - #SL-2
    ECHLIN: ML-1

    ALL are USA made (except ECHLIN), at least the ones we tested. The TISCO kit contains the condenser, rotor, cam lube, and reusable a .015” feeler gage for gapping the points. The last set of TISCO points I used in my own 8N lasted me over 6 years and could have gone longer. NAPA sells all the front mount parts and all Made in the USA. I know you know this and are doing everything right, but I am just adding to this post for the record and so others can see who don’t know. Expect to pay $16 +/- a buck for the reliable brands. You need to pull the distributor off the tractor and rebuild on your bench to rebuild and test properly. Timing the front mount is specified al the manuals. Farmer Dan had fabricated a timing gage years ago and a few others have copied and produce one nowadays. The gage makes it faster and easier to set the timing with but you should know how to set it without a gage. Reinstallation is the one place that can get wrong. If unit is mounted 180° off, at first power it will bust the aluminum base and render it useless see pictures. Finally, Spark Plug wiring can be mixed up sometimes. The firing order on the Ford Tractor 4-CYL engine is 1, 2, 4, 3 CCW on both front and angle mount distributors. It is easy to get #3 and #4 plug wires reversed.

    FORD TRACTOR 9N & 2N OEM 6V/POS GRN WIRING:



    FRONT MOUNT TIMING PROCEDURE:

    FORD TRACTOR FRONT MOUNT DISTRIBUTOR TIMING APPLICATION GAGE:


    FORD FRONT MOUNT DISTRIBUTOR – WHAT HAPPENS WHEN INSTALLED 180° OFF:


    FORD TRACTOR FRONT MOUNT DISTRIBUTOR FIRING ORDER; 1,2,4,3 CCW:

    Tim Daley(MI)

    49er swGA    Posted 06-27-2020 at 21:39:54 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Front Mount Distributor Won't Time Properly
  • Thank You Tim for your input, I bought one of those "timing devices" and use it whenever I have the dizzy off for adjustment/repair...
    It`s the "most handy tool in the box".
    Dennis

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