JD 5300 Float setting at rear SCV

[JoeBob394]

JD 5300 with 520 FEL connected to the rear scv outlets.
To use a rear mounted implement such as a disc mower or tedder with a single hydraulic function I have always disconnected what I think is the "A" coupler (raise function for the loader) and connected the implement. The disc mower should be operated in the float position and I do push the the joystick forward and lock it into float. The issue I am having is that it engages and dis-engages with some difficulty, and it seems to labor the engine significantly more than if the mower was simply lowered and the lever released back to its neutral position. My basic understanding of the float function is that the fluid flows freely through the circuit. Im not sure how that is accomplished with only one hose from the implement connected. It is almost like there is some sort of dead heading going on. It may be me but it seems that if I go in and out of float more slowly the problem is not quite as noticeable.
Thanks

 

[adc8693]

Did you ever figure this out? my 5500 seems to be laboring when in float compared to when not in float.

 

[JoeBob394]

No, I did not, but I no longer use the tractor for mowing so I can only assume the issue still exists, particularly since I have other recurring hydraulic issues with the tractoe as noted in other threads I started here. I do believe that the 5500 has a different hydraulic pump but I could be wrong about that. Thanks for the inquiry.

 

[adc8693]

The 5500 does have a different pump. It has a separate hyd pump for the steering that piggybacks off the main hyd pump. I had an issue this past year where my hydraulics were unresponsive. Found out it was a bad shaft seal in the pump since it was sucking in engine oil. Replaced the seals instead of the 1600 dollar pump, and problem fixed.

 

[adc8693]

it seems like it is not going fully into float. I may have to look at the linkage to the valves or see if something is blocking the valve spool from going completely into float.