Posted by ONT656D on November 20, 2012 at 10:10:36 from (67.71.94.237):
Last winter my new to me 656 was slipping the PTO on my IH 80 blower. A complete change of hyd oil and filter helped enough to finish the winter. My local independent shop dismantled the PTO and completely rebuilt the unit, using IH parts. The fiber discs were cooked and some steel ones were bad. All was replaced, and the hyd oil and filter chanced again after 27 hours. Putting a pressure guage on now, the pressure is 50 pounds at initial engagement, HOWEVER, ( I hate that word...)when fully engaged, the reading is 105 pounds. He air pressure checked the unit before installation looking for leaks and found none. In my former farming days, I did a lot on 656s thru 1086s and never had a pressure problem. I talked to two older ( in their 70s) good old IH mechanics and they could not recall a pressure pump problem, nor is the power steering or remotes an issue, and the rear and the pto were free from debris.Is there something we are missing, or am faced with a pump replacement. Is there a cheaper solution, can I just replace the pump gears, machine the tolerances... Every hour of experimentation is on the meter. Thank you for all suggestions.
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Today's Featured Article - Hydraulics - Cylinder Anatomy - by Curtis von Fange. Let’s make one more addition to our series on hydraulics. I’ve noticed a few questions in the comment section that could pertain to hydraulic cylinders so I thought we could take a short look at this real workhorse of the circuit. Cylinders are the reason for the hydraulic circuit. They take the fluid power delivered from the pump and magically change it into mechanical power. There are many types of cylinders that one might run across on a farm scenario. Each one could take a chapter in
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