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Discussion Forum

Re: newbie JD 510 injector pump help

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04-10-2012 19:51:12

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Hate to bring an old thread back from the dead, but in the off-chance that someone who's successfully taken that Roosa Master injection pump out is still reading these boards, how on earth did you get the pump shaft out from the timing gear? From the parts blowout it looks like its just a tapered shaft with a D-shaped key holding it in, but I've gotten everything off this tractor except for the timing cover (which I really don't want to do unless absolutely necessary!) and removed the pump itself, leaving just the shaft dangling out still stuck in the gear... All the pounding I've done so far hasn't budged it a bit! I've put the nut (#2 in the pic below) flush with the end of the keyed shaft (#36 & #4) and smacked it pretty good with a 3lb mallet, but I'm afraid to hit too hard in case I break that $350 gear! Not sure that I should heat it either for the same reason, not to mention that its covered in oil.... Could I get the key out perhaps? Given the shape I don't see how, but I'm right out of ideas at this point :?

Or maybe someone else has run into this particular design and successfully removed it without putting a puller directly on the gear (which I can't do unless I remove the entire timing cover)



P.S: Hmm, looks like i can't post images yet :( I'll get it up ASAP.
If you want to cut&paste the URL, the image is
This post was edited by alteramaxplus at 19:55:30 04/10/12 2 times.

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04-12-2012 05:21:27

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 Re: newbie JD 510 injector pump help in reply to alteramaxplus, 04-10-2012 19:51:12  
Why do you want to remove it? Just curious.

I assume you've got a 510B and not a 510 since a 510 has a vertical pump and no tapered shaft.

I've removed many without taking off the timing cover. You might have to get some other stuff out of the way. Once the injection pump is off - have someone hold something heavy against that gear from the pump-shaft side. Then from the other side - you use a large drift pin and hammer (or whatever you have) and give the end of the tapered shaft a hard whack. If hit hard - with that gear backed off, the shaft will pop right out. No different then removing a flywheel from a tapered shaft on a small engine. You DO want to protect the threads of that shaft end though - unless the shaft is broken and doesn't need to be reused. I've only removed them when broken. I can't think of any other reason to take it out. I know you said you've hit it already - but that won't do any good unless that gear is backed up from behind when you hit the shaft.

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