Re: Hydraulics on 560 running

Posted by Joe Evans on September 13, 2004 at 07:37:29 from (209.41.233.88):

In Reply to: Hydraulics on 560 running posted by Donny on September 13, 2004 at 06:33:08:

Sure do.

Your hydraulic system is staying in a hi-pressure condition--the only 'rest' it gets is when it has a chance to move oil through relatively large openings such as actuating the fast hitch cylinder.

The hydraulic pump has to move oil at all times, or it will damage itself and other stuff. When hydraulic oil (pressure) IS NOT diverted to actuating the fast hitch cylinder or remote cylinders, the pump's output MUST be diverted back to back to the sump. This is accomplished by the regulator and orifice plug/screen. IF these aren't doing their jobs (unloading the system by dumping hydraulic pump output oil to the sump), THEN hydraulic oil has to scream through the relief valve. This situation will most definitely bog down the 560.

Most likely the orifice plug/screen is blocked by crud. Consult your manual for their location. They're very easy to remove and clean. There are some other things that may cause the hi-pressure condition you describe, but the orifice plug/screen is the first place to look IMO.

Post again with your findings, or if you need more assistance.

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