sporteus
Bronze Member
Continuing with my renovations on the JD650 I purchased at auction, I'm focusing on the things that I think need fixing, repairing, tweaking that I can do myself without getting into too much trouble (presumably).
Question on the pivot joints for the backhoe and the loader. There are a couple of bolts that are obviously not the right ones for the joint and were likely and after thought to get the tractor to auction (very little rust). So, I'm going to swap those out for a more appropriate size and grade of bolt. A few questions.
I'm assuming that any pivot joint should be "tight" to the point of minimal lateral movement but enough slack for grease to push though easily and lubricate. The elbow pivot on the backhoe has the wrong bolt and there is almost a 1/2" of slack laterally between the stick and the boom because there are no bushings . So, I'm assuming I should fill with bushings, spacers, extra think washers to prevent excessive lateral movement on that pivot but don't make it so tight that grease can't get through.
Likewise with the diameter of the bolts, tight but with sufficient room for grease movement around the bolt, right?. I replaced one at the base of the backhoe with the appropriate size (according to the manual I found online), but there is still a lot of play in the diameter of the bolt and the pivot point. It took a 3/4" bolt, but the play feels like it could take a 7/8" or 1" with plenty of room for movement. Problem is, the holes on the frame will only take a 3/4", so I didn't try to put anything larger in there to close up that slack.
I'm assuming these same rules with any pivot joints. The bolts securing the loader bucket are also not the right ones, actually thinking those should be pins and not bolts, so may try to find the right sized grade 5 or 8 pins to put in there.
Next year I might try my hand at actually understanding hydraulics, but I'll wait until I can study up over the winter! Too may hoses, valves, cylinders, and thingy-ma-bobs for my brain to handle right now.
Question on the pivot joints for the backhoe and the loader. There are a couple of bolts that are obviously not the right ones for the joint and were likely and after thought to get the tractor to auction (very little rust). So, I'm going to swap those out for a more appropriate size and grade of bolt. A few questions.
I'm assuming that any pivot joint should be "tight" to the point of minimal lateral movement but enough slack for grease to push though easily and lubricate. The elbow pivot on the backhoe has the wrong bolt and there is almost a 1/2" of slack laterally between the stick and the boom because there are no bushings . So, I'm assuming I should fill with bushings, spacers, extra think washers to prevent excessive lateral movement on that pivot but don't make it so tight that grease can't get through.
Likewise with the diameter of the bolts, tight but with sufficient room for grease movement around the bolt, right?. I replaced one at the base of the backhoe with the appropriate size (according to the manual I found online), but there is still a lot of play in the diameter of the bolt and the pivot point. It took a 3/4" bolt, but the play feels like it could take a 7/8" or 1" with plenty of room for movement. Problem is, the holes on the frame will only take a 3/4", so I didn't try to put anything larger in there to close up that slack.
I'm assuming these same rules with any pivot joints. The bolts securing the loader bucket are also not the right ones, actually thinking those should be pins and not bolts, so may try to find the right sized grade 5 or 8 pins to put in there.
Next year I might try my hand at actually understanding hydraulics, but I'll wait until I can study up over the winter! Too may hoses, valves, cylinders, and thingy-ma-bobs for my brain to handle right now.
