Update JD310a slow hydraulics

[onalaskahoe]

Update on JD310A with slow and weak hydraulics.

I have found and fixed the following items:
1. The Stroke control valve had the incorrect O-rings on it and the sleeve seal O-ring of the outer sleeve was missing. I corrected this with new valve ($65) and things got a little, but still not right.
2. The Trans fluid filter bypass was worked on and the spring-pin at the front was too long and this stopped the bypass sleeve from going all the way in and seating as it should. Replaced with new outer sleeve and new valve slide ($31) and set spring-pins correctly. Even better still but not right still slow and weak.
3. Pressure control valve was found to have this as follows in order: a) End cap. b) ¼ -20 bold (also known as a backyard mechanic spacer) c) spring. d) Wrong washer bent. e) Valve head just half of it. I get the new valve sleeve and valve head ($86) and when installing it I found that the spring is about ½ to 5/8 inch away from the end cap. My question now is does anyone know what the spring length should be?

I will continue to update because it is what is needed for this site, I get a lot of help from all of you so I just want to return the help.

 

[Roy Suomi]

My 302-A book says valve spring free length is 4.61 inches....Valve spring test length is 3.5 inches with 50 pounds plus or minus 5 pounds..same exact system as 310-A....

 

[onalaskahoe]

Thank you, the spring is long enough then, it checked out at 4.6

Do you know what the cap end should be in dimention. i know that the valve should never be free floating or the valve head will fall out of position.