630 JD Reduction Gear Noise

[BNort]

Once upon a time, somebody posted something about replacing some bearings that cut the first reduction cross cut gear wine in half. Does anybody know which bearings this would be? I would like to quiet the wine in my 630 to a minimal level. This tractor has wined or howled forever. It howls going up hills and quiets going down hills.

 

[BushogPapa]

The gears most likely have picked up the wear pattern , or are worn..
The only way to eliminate the noise may be to replace the entire gear-set..
New bearings on the 1st red gear may help, but it is work to remove the 1st red cover..may as well change for a known "quiet-running" set..

IMHO..

Ron.

 

[johns48jdb]

You don't have to remove the frg cover. Remove the cover off the coutch paqck and remove the clutches and clutch driver. You'll have to make a puller or buy one to get the driver off. Mark the end of the crank and the driver just for fun. I Think they aren't marked and don't have to go back in any paticular place, but if its worn any at all i'd feel more comfortable about putting it back where it was. After you get it off, pull the pulley assy. It should come out ease, but you have to remove the mechasium that works the clutch. Don't try to remove the clutch handle, just remove the lingage and take the four bolts out and pull what i would call the throw out bearing yoke. There is a bearing in your pulley assy and a bronze bushing. Replace them both. Also you might want to replace the bearing that supports the end of the fr gear. You probably can't get it out without pulling the frg cover, but that a different story. You really need a manual before you start this, but it something that you can do. Don't be scared to jump in.

 

[Mike Aylward]

On a 630 the clutch driver IS indexed to the crankshaft. There should be a "V" mark on the crankshaft and the driver. They WILL vibrate if not timed right. Mike

 

[wilamayb]

John, He does not have a clutch problem! He clearly states that his reduction gears are noisy. He states nothing about the clutch. Not every tractor is a late B. A late B is not very similar to a 620/30 except for they both have two cylinders and are painted green.

To the original poster.... One bearing on the outside of the trans input shaft can be changed without pulling the cover. I seriously doubt if it will fix your problem alone. I'm afraid that papa may be right in saying that your gears have a wear pattern. Some of this can be covered with a drain and fresh fill with the thickest gear lube that you can find. It will be quiet until it is worked for a while. At that point nothing is going to keep it quiet. Straight cut gears tend to make noise.

 

[DONMYEIL]

Most likely the bearing in the reduction cover has gone out. Simply remove the little cover, the nut on the shaft and pull the shaft out then hit it with a soft hammer driving the shaft in and then the bearing will come out. The shaft doesnt move very far. The bearing is the same as a wheel bearing used on chevy cars.

 

[DONMYEIL]

Sorry its not the same bearing. this is a ball bearing.

 

[tim s]

I have a 630 here now that has a noisey gear sound that seems to be comming from the reduction case area, I re-placed all the bearings that I could get to after I removed the cover,and the clutch pully bearing and bushing, the driver was worn, put a new one on and outer disc, new clutch plates,new heaveyer oil, still sounds the same, I've been fiddleing with it in between jobs ,can't seem to come up with anything but the idea of worn gear sets from a lot of work in the past, I don't think that anything that I have done so far has helped the noise , but the clutch is much better, it had 'pop can' shims in the driver and was drawn in on the crank till it was 'flush' with the end. The owner has not come to check on it yet,,my thoughts are I could change a lot of gears and inner bearings and "might" help guiet it down...

 

[DONMYEIL]

Tim , if the driver had shims and was flush with the end of the crank ,the pulley gear is going in too deep and the operating sleeve is riding on the pto gear. You can see this when you pull the clutch pulley, it will have teeth marks on the operating sleeve. You need an undersize driver to fix this. You should have the driver abt .100 to .200 out from the crank. Also make sure the pulley gear has not moved out as well. You probably need to replace the bushing in the pulley, time to repack the roller bearing when the pulley is off.

 

[tim s]

Yes I did replace and pack the bearing and replaced bushings, the new driver tightened up correctly to the crank,,all of this worked out okay,,but still have a gear noise.

 

[F-I-T]

Tim:

Have you ever tried lapping gear sets like this using Clover SC compound? I've done many that way with great success. You just have to wring off the high spots to get many more years of use and really deaden the noise. You can go to the johnnypopper.com board and read about how johnnyputt re-wrung a welded tooth gear set on a Dubuque. Fanshaft gearsets can be recovered that way, too. I've polished dozens.

Frank

 

[tim s]

Yes, I've heard about lapping gears,,but I'm not real sure which one's to lap, I'm leaning towards the first reduction gears, but they didn't look bad, it seems to be in all the gears and don't matter if it's turning tight in ether direction or if it's pulling a bit harder or not, I got it buttoned back up now and setting in another shed waiting on the owner to take a look at it,,as I've said before I'd rather to the trans.in an 8640 than one of these, for me they'er more predictable.The noise is defantly 'there',I don't know how much work this old gal has seen, It is "much" louder than normal, I'm not sure how far the guy wants to go on time and money, he's just restoreing it and was conserned that a bearing in the reduction case was going bad to worse...I know it was used enough to wear the clutch driver out, the brakes were gone too, I re-did them and turned the drums, I put some #150 oil in the trans. thinking it might help a bit,,maybe it did a bit,,but not enough to suit me.