Posted by bc on November 24, 2008 at 18:02:31 from (68.88.175.43):
In Reply to: IH 1466 Hydro problem posted by Walt7777777 on November 24, 2008 at 04:22:03:
Don't forget to clean the screen and replace the filter. The screen and filter partially blocking the flow will affect the output. You will hear some whine with it when that happens.
Unless you tore the gasket, bolt it back up. The pump housing isn't under pressure. It just hold the fluid in the cavity behind it. I change the filter on my 2606 a couple times and haven't replaced the gasket yet on that plate and no leakee.
I'd look for something or some sludge holding a check ball or relief valve open. Anywhere you see a thin bolt head as Owen said. Not all have the psi stamped on them or else they are painted so you can't see it.
Flow test the pump with a clean 5 gal bucket. Mark at 1 gal intervals. Take a line loose and time how long it takes to pump a gal or two. Then replace the fluid. As pumps decline so does the gallons per minute it puts out.
If your pump runs more than one system, then you need to isolate them to find what is wrong. Not as likely, but a leaking piston seal on a cylinder will allow flow by and loss of psi so check all your cylinders.
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