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Recent content by a1940jd

Yesterday's Tractor Forums
  1. A

    JD 60 Pistons in Unstyled A

    The crank stroke for the model a is 6.5 until 1944 when it jumped to 6.75, Unless your referencing the model oa which had a stroke of 6.75 already in 1936. Install a inexpensive 6.75 crank with model 60 high altitude, m&w high compession ,or propane pistons. What ever you want to call them just...
  2. A

    spark plugs

    Try champion d89d igniter plugs. They fire much better then any standard type plug and don't foul nearly as easily. Very pricey but are like night and day difference. Usually not a stock Item but any good parts store can special order. Check clearance as they will protrude into the combustion...
  3. A

    JD A stroke / piston costs

    I stand corrected. Good catch.
  4. A

    JD A stroke / piston costs

    Used pistons from a model 70 gasser measure 5.75 and are a inexpensive option. Just bush the wrist pin and remove the wiper ring. Might have to cut the skirt for clearance. If your using aluminum pistons don't forget to give yourself lots of skirt clearance or they will bind as the engine heats...
  5. A

    lite weight front

    my Email is open if your interested in more details about the complete light weight front end.
  6. A

    lite weight front

    This is a complete assembly that is bolt on and ready to go. If one is purchased I will show you how you can lighten the year axle another 250 lbs. The model A can be very competitive in the 3500 and 3800 lb class without spending tons of money on engine work.
  7. A

    lite weight front

    This front end assembly is 165 lbs lighter then the original narrow front.
  8. A

    Stuck: JD A Transmission topshaft gear removal

    Drill and tap the sprocket in 3 equally spaced areas. About a 1/2 inch n.f. thread should do it. U might have to cut the narrowed tip of the end off the tap to thread all the way through. After u have tapped threads heat the sprocket and cool by spraying with a penetrating oil. Run the bolt...
  9. A

    Post your pictures

    model A pulling 3500 lb class
  10. A

    motor oil

    Have heavy duty straight 50 weight motor oil that meets diesel specs. I am thinking about running it in our 8440 during the summer only. The tractor has always had 15w40 run in it and has 7000 hours on the original engine. Any thoughts or advice would be appreciated.
  11. A

    Model A front end weight

    I have a complete assembly that will shed well over 100 lbs
  12. A

    guess the weight

    Used a cnc however a good metal cutting hole saw will do it also. gear teeth are another story, they are case hardened and extreamly hard.
  13. A

    guess the weight

    Looks like somebody has done this before. We removed exactly 36 pounds. Good Guess.
  14. A

    guess the weight

    quess how much weight we removed from these model A jd bull gears
  15. A

    Fiberglass sheet-metal for two cylinders????

    I think in your case it might be best to simply use the center grill piece from a 720 or 730.
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