Author	[Modern View]
730-LP 09-08-2012 19:42:19 75.201.190.54 Report to Moderator	Bought a 620 that was suppose to have been driven in the 2010 Christmas parade.Tractor was in the dry with the exhaust covered,the engine was stuck,we took a chain and put thru the flywheel holes and a 5ft bar and rolled the engine a 1/4 turn.now you can roll it back and forth by hand but no more.Rockerarm is off so its not a stuck valve.Any one got an idea?? thanks [Reply]   [No Email]
LarrySTN 09-09-2012 11:23:29 71.54.89.157 Report to Moderator	Re: 620 PARTIAL STUCK ANY IDEAS in reply to 730-LP, 09-08-2012 19:42:19   find someone with a borescope to look in the cylinders. [Reply]  [No Email]
Howard H. 09-09-2012 06:29:59 156.110.78.2 Report to Moderator	Re: 620 PARTIAL STUCK ANY IDEAS in reply to 730-LP, 09-08-2012 19:42:19   A neighbor had an irrigation engine one time that would partly turn one way like that after sitting idle all winter... Finally pulled the heads and realized mice had partially/mostly filled some of the cylinders with grain. Howard [Reply]  [No Email]
craigco 09-09-2012 06:05:05 69.171.160.74 Report to Moderator	Re: 620 PARTIAL STUCK ANY IDEAS in reply to 730-LP, 09-08-2012 19:42:19   Friend had a 630 that sat with the fuel open. Fuel made it to the cylinder where it eventualy turned soild. The engine would turn about a quarter turn then hit the blockage. Pulled the head and broke the chunk out. [Reply]  [No Email]
Mike M 09-09-2012 05:59:18 70.194.10.100 Report to Moderator	Re: 620 PARTIAL STUCK ANY IDEAS in reply to 730-LP, 09-08-2012 19:42:19   May also be a main bearing? The oil supply hole seal washers can swell and choke them off. [Reply]  [No Email]
Mark-Ia 09-09-2012 05:51:44 207.177.117.7 Report to Moderator	Re: 620 PARTIAL STUCK ANY IDEAS in reply to 730-LP, 09-08-2012 19:42:19   Put some oil in the cylinders and try again. [Reply]  [No Email]
MSD 09-08-2012 21:31:27 67.4.59.86 Report to Moderator	Re: 620 PARTIAL STUCK ANY IDEAS in reply to 730-LP, 09-08-2012 19:42:19   Seen that happen when a piston breaks. Rebuilt a couple of 620's and 30's that had the top of the piston break. Looks like a design flaw or a weak spot in the piston where they break. [Reply]  [No Email]
patsjohndeeres 09-08-2012 19:50:57 199.101.57.14 Report to Moderator	Re: 620 PARTIAL STUCK ANY IDEAS in reply to 730-LP, 09-08-2012 19:42:19   I have had a few tractors like that as well.Best thing is to pull the head and hone the cylinder walls. I had one that I ended up drivening pistons out and there was build up under the rings, cleaned pistons up and clearance was great. [Reply]  [No Email]