recently bought a 62t baler...I keep breaking the shear bolt at the pto...plunger keeps hitting the plunger stop...I realize it's supposed to do this...although I can't seem to adjust the timing for this operation...any help would be appreciated...also...are there any outlets for parts for this thing...I know its old...although has been stored inside for awhile...a long while...everythin look pretty good on it...just rusty and a little 'loose'...especially the chains...I am a virtual novice with this hay stuff...any help would be appreciated...thanx, scott