I purchased a used 620 JD on 06-17-2000. The
tractor ran fine, but the clutch didn't disengage
very well. I assumed that I had to do some
adjusting. I drove it around a circle driveway for about 30 minutes. I tried to stop, but it was still in gear, so I turned off the engine. When I took off the Pulley Cover, I found no
movement of the 3 Bolts. I took off all the easy
parts. Next was the Fixed Clutch Drive Disk, P/N
A5642R. This part was very hard to remove, it took a lot of torch heat. I removed all the easy parts and don't think that the 3 Bolts moved in the last 20 years, as I had to pound them out. I bought about $800. worth of parts from JD, including a new Clutch Operating Sleeve, P/N A5503R. Next I had to remove the Pulley Gear, P/N A5501R. We tried to heat it with a torch, but no luck. We finally got a 10 ton Hydraulic Puller and removed it. How do I tell when I have too much play in the 6 bosses that the 3 Dogs, P/N C74R mount in? If there is some measurement, I don't seem to find it in the PC528 Parts Catalog, SM2008 Service Manual, or the OMR2053 Operators Manual. If I have some wear, measuring with a Telescope won't tell me how I am out of round. My new Clutch Dog Pins, P/N D355R are just as sloppy as the old Pins. Do I have to spend the $560. to the person for the rebuilt Flywheel? If I am to drill out those 6 holes, how do I fit a 90 degree head on an Electric Drill? Say that I do it, then how hard must I make the 3 new Pins? In addition to the previously mentioned Manuals, I bought 5 others that JD said might fit a 620. I also bought one from I&T. If I am missing something, just tell me and I will buy it. Thank you,
Gordon in WI
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