Posted by Owen Aaland on July 31, 2009 at 15:29:23 from (65.174.247.87):
In Reply to: 656 hydro question posted by theponyroper on July 31, 2009 at 06:01:24:
theponyroper said: (quoted from post at 06:01:24 07/31/09) Thanks for your excellent description Owen. It looks like my problem may just be wear and tear or age and not the hydro itself. It's probably a combination of wear on the plates and on the valves themselves. I still need to cap the lines to be sure it's not in the external controls and I plan to do that ASAP. My next question is, if it should be that the charge pump or motor plates are scratched or worn can they be replaced? What needs to be done to get to them and replace them? Thanks again for all your help. I will print out all the replies I have received and show them to the mechanic I plan to have do the work so that he can review them before tearing into the tractor.
When you start having problems with scoring on the plates it gets expensive very quickly. To replace them requires a complete disassembly of the center section of the tractor.
In addition to the plates you would probably also find worn "slippers" on the ends of the pistons in both the motor and pump. The labor is not that difficult with a couple of special tools but you will quickly run up a couple thousand dollars in parts.
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