Early D2 master pin plug removal tools

I see what you mean in the D2 Servicemen's Reference Book. Cat screws up again🙄 🙄 Those are the parts required for the D4/D6 with 1/2 in. NF threads.
The parts you need for the D2 are 7B2708 screw, 7B2709 sleeve and 7B2710 nut.
Check your threads again....I believe these are 3/8 NF. I don't think you could pull anything with 5/16.

Old Magnet is right... they are 3/8" fine threads on the D-2. I also bought the Cat tool to do the job, and proceeded to break it...Cat would not replace it. I have had much better luck using a slide hammer to remove the plugs. Good luck.

Thanks bcwayne, I thought it was 3/8 but I'm a little rusty on the D2's.
For the 4's and 6's I use a combo for the tough ones. It's a long (5 in. I think) continuous threaded grade 8 bolt that I preload with socket and nut/washer with the bolt head captured in a 3000# drilled pipe cap connected to a 3/4 in schedule 80 pipe with at least a 10lb slide hammer weight. (sometimes use an old cluster gear that's probably about 20-25lbs). I tighten the nut as tight as I dare (with full thread purchase) then give it a whack with the slide hammer, also a little heat if I think it needs it. Haven't had one yet that couldn't be persuaded.

BC & OM,
Thanks again for the help and suggestions. I did run a tap into the treads a couple of weeks ago but I can't remember sh*t any more 😕 . I'll do it again today. I also had thought of using a slide hammer but where do I find grade 8 hardware? Is that the toughest available? I suppose Snap-on may have a hammer, they have a large facility here in Conway, AR.
Best regards,
Jim

I buy most of my hardware on line from www.mcmaster.com. Going to town for anything in my area is a waste of time. Grade 8 is the toughest commercially available hardware but there are specialty items for grade 9 or better. Decent slide hammers are kind of pricey and they are not that difficult to make.

I buy most of my hardware on line from www.mcmaster.com. Going to town for anything in my area is a waste of time. Grade 8 is the toughest commercially available hardware but there are specialty items for grade 9 or better. Decent slide hammers are kind of pricey and they are not that difficult to make.