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JD 520 belt pulley help

P

PecanMan

New User
As seen in an earlier post, I have a dangerous clutch. I have purchased all new parts, dogs, bones, bolts, plates, etc. I have a parts catalog and service manual. The drive disk was pulled (fun). Now, I have removed the clutch and brake control pins. I have watched the video on the 730 removal. We can not get the Pulley to budge. Any suggestions on getting it to move. Else, I will have to trailer it to someone to do a basket job, which will be hundreds of miles I'm sure.
Thanks
 
you need to remove the 4 bolts that hold the clutch fork in. Remove the clutch fork, your pulley should come off.
 
Mark is correct, the four bolts that hold the clutch fork and brake has to come off.. This off, pulley
should come off crankshaft.. The JD 730 pulley removal is different.. If you have taken off the pulley
fork and find the pulley is stuck on the crankshaft, then it maybe the pulley bearing is seized on the
crank???
 
The fork is completely removed and set aside. The pulley is not budging, so I have to assume the bearing is stuck. Is there any type puller or prying mechanism available, or am I looking at a crankshaft removal?
 
Just did this a couple of weeks ago on my 520. After removal of the clutch driver and the clutch fork assembly, the pulley slid
right off.
 
Does the 520 have a clutch pulley bearing? I've never worked on a 520 clutch, but the JD 50 has a bushing in the pulley that runs directly on the crankshaft. Maybe a gentle pry on the clutch pulley gear through the clutch fork opening?

It's a big job removing the crankshaft, and one of the first steps would be removing the clutch pulley. Something has you stymied - look it over some more and you'll spot the problem. Keep us posted - we all learn from this.
 
Clutch pulley pics.
cvphoto52172.jpg


cvphoto52173.jpg


cvphoto52174.jpg
 
In your first clutch pulley picture shows the crankshaft with pulley. The tin center piece is the bearing
retainer. Drill a hole in it and pop off. You will see the outer race with rollers; the bearing. It must
be seized to the crankshaft. Take your torch and heat up the rollers to see if they will release off the
crank. If have too, cut out some rollers. When heated or cut, try a careful pry between the two gears
through front clutch fork opening. Pulley will slide off crank. See how bad the area on the crankshaft
where bearing rides is chewed up. The 520 does not have a race on the crank. Clutch bearing rides on the
crankshaft..
 

Is there any up & down movement to the pulley / crankshaft? Does it rotate freely on the crank shaft? Does the operating sleeve slide freely
inside the 1st reduction gear housing. Should be nothing holding it on except friction. It's possible to rig up a slide hammer off all 3 adjustment
bolts at the same time? I had always thought the bearing retainer sat flush with the pulley. Has someone else installed a Press fit bearing of some
sort?

RLA
 
SUCCESS!!!(sort of). A neighbor said he had a puller with small grips that he would try on the bearing dust protector. It did grip and I was beating the pulley at the same time with a rubber hammer & it started to slowly move. The parts manual calls it a bearing retainer. It finally came loose with pieces following. I started then picking out metal and square shaped rollers. How it ran as long as it did beats me. So now I have to figure out this bearing thing. The book calls it "race outer, with rollers".
See pics, and thanks to all!
cvphoto52291.jpg


cvphoto52292.jpg
 
How does the crankshaft look where the pulley bearing rides?? No removable race on this crank.. Is the
crankshaft chewed-up where the bearing rides?? Can the crankshaft be cleaned up and used??
 
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