630 damage (sigh)

fixerupper

Well-known Member
The PTO on the 630 has been noisy from the belly of the tractor this summer but I just haven't had time to look into it with my dad's health problems and the nursing home stuff taking up so much time. My plan was to tear into it next winter. Well, I'm forced into it now. Bearing went out and the gear ground itself through the front of the first reduction cover. Hopefully tomorrow I will have time to pull it apart to have a first hand view of the damage. I've been wanting to renew the right crankshaft bearing anyway so I can kill two birds with one stone. I was thinking of patching the hole but there's a crack going out to the bolt hole so I might be picking up a different reduction cover.
mvphoto10412.jpg
 
Sorry to hear of your other troubles and best of luck on that rocky road, but this isn't a biggie in my book. First the crack has relieved itself already by running to a bolt hole. A thin piece of steel shaped to fit the outside of the hole and brazed into place would hold your grease in there no problems. Gouge out the crack with a grinder and fill it back up with the same bronze. Certainly worth a try. I've done engine blocks this way after they let go a connecting rod and put hole thru the side big enough to feed people sandwiches thru and no problems there. You might consider further sharp corner relieving by just rounding them well and proceed with the bronze. Cast iron was made for bronze repair or the other way around, but the two make for a perfect marriage. Done right with perhaps a step ground in and flush tin work followed by aggressive sandblasting to match surface texture and good paint, most would be hard pressed to even spot the repair from the outside. Even thought about dropping playbox sand from thumb and finger from about one foot onto the wet paint for the texture match, but didn't bother because it didn't really matter that much to me.
 
Sorry to hear of your troubles Jim. Keep us posted on how you fix the 630. I remember an old JD mechanic joking that when they built the two cylinder tractors, they started out with the PTO angle gears and built the rest of the tractor around them. The PTO on my 50 is noisy, and I'm dreading the fix.

Paul
 
A 630 is a very sought after tractor. Unless you
plan on keeping it until it is scraped out I would
change out the housing You will have it off anyway
and if you sell it sometime it will bring what it is
worth, not scrap price
 
Dad bought this tractor new so it's staying here at least until my son leaves this earth. It's tempting to patch it just because I can do it but a salvage yard cover is only 90 miles away. I'm leaning toward a different cover and keeping the old one.
 
I suppose the time to completely check the whole transmission is now....you'll probably find after removing the reduction gear cover that the lower shaft in the tractor is loose....how much time and money you want to spend may be the question...I suppose you could be lucky and the end bearing of the upper shaft/reduction cover is to blame....generally there's much more when you get inside. Good luck.....tks Chuck
 
So you don't have to go back and correct it later check the part # on your reduction cover and match it up with the replacement one . Most of my 630's have the R- part # . Early ones have the A- part # like a 620 . When you get done remember to put a qt of lube in the reduction cover in addition to filling the tranny .
 
Thanks for the ideas guys. I didn't get at it today, too many irons in the fire. I've been into the tranny twice in the past 40 or so years but it's been a long time since the last time. The gasket between the rear end and tranny housings has been dripping for awhile so I'll probably split it now to replace the gasket. Don't know if I can get at the bevel gears from the back. Probably not? I'm not sparing the dime on this tractor. I eventually want to get it up in top shape, paint it and turn it into a trailer queen but that's down the road a bit. I have a feeling the PTO clutch is exchanging fluids with the rear end but that'll have to wait till winter. Jim
 
I restored a 70 D my great uncle bought new and we purposely left some things he repaired for conversation. YOU SHOULD REPAIR IT
 

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