|
Dale(MO)
06-28-2004 20:50:37
|
|
Re: Case 450 Sinking Bucket in reply to John Van Valkenburgh, 06-28-2004 19:27:17
|
|
| |
John, I have the same problem on my HD3 Allis. I rebuilt the cylinders (new pistons, rods, and packing kits), but the bucket cylinders still bleed off. I am certain mine is in the spool valve - nothing between the two to cause it. I have been into a couple of spool valves, and if the bore is rough, or scarred any, you might as well turn it in for core when you order your new one. The spool rod and bore are precision ground as mating parts. When any pitting, scarring, or out-of-round occurs, I have been told the only way to really fix them is to bore them out oversize, sleeve them, and make a new rod. The rod is induction hardened, so it usually will wear the cast iron valve body before it wears. But as soon as any wear occurs, the oil will cavitate and scar the spool rod. I have seen some that had bent rods, too, which can't normally be saved. I am usually one to fix or repair what's there before I consider replacing with new, but this is one part I would just automatically replace with new. I don't know if your spool valve is readily available (it seems like they change that stuff every couple years), but as long as it is the same style of spool (open center, closed center,etc.), and the lines hook up properly, you can retro-fit it and it should work fine. Good luck!
|
|
|
