Posted by charles todd on August 03, 2008 at 21:22:01 from (205.242.95.130):
In Reply to: Rebuild or replace? posted by wallacedw on August 03, 2008 at 13:47:19:
I was chasing dragons with a plastic sword for a while on my Farmall 504. I installed a loader and did not have near the lifting power the specs stated. Checked my hydraulic PSI at the remotes and it was lower than what the relief is set at. I rebuilt the valves, installed a new pump, and changed the oil and filters. The only thing that happened was I got a faster cycle time on the loader (changed the 12GPM to a 17GPM). It still would not lift the front tires off the ground. Found the pilot relief valve for the remote valves and it was stuck open. Cleaned it up and reinstalled. Still the same issue. Removed it again and found a hardened o-ring that seals it between ports (the o-ring in the manifold body, not the relief). This o-ring had worn a groove in the relief valve, got a new one on the way. I am 100% confident this was my problem. Should have looked there 1st!
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Today's Featured Article - Timing Your Magneto Ignition Tractor - by Chris Pratt. If you have done major engine work or restored your tractor, chances are you removed the magneto and spark plug wires and eventually reached the point where you had to put it all back together and make it run. On our first cosmetic restoration, not having a manual, we carefully marked the wires, taped the magneto in the position it came off, and were careful not to turn the engine over while we had these components off. We thought we could get by with this since the engine ran perfectly and would not need any internal work. After the cleanup and painting was done, we began reassembly and finally came to t
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