The hydraulic system on the 2510 is a closed system, which means that once you get air into it is very hard to get it out of some parts of the system, like the steering.
If I remember correctly, on the left side of the steeling column, under the Saddle is the bleeding valve, it looks like a small pipe nipple with a screw in the end of it, to bleed the system, loosen both the nipple and the screw slightly; start the engine; and turn the steering wheel all the way to the left and hold it there for several minutes then tighten the screw while holding the steering to the left. If all the air in not expelled, repeat process. The reason the 3-point would stop when you use the steering, or the brakes, for that fact is that JD uses a priority valve to supply power to brakes & steering before other hydraulics. If the system is working completely, you won�t notice this valve working.Check the brakes by pressing the peddles down 3 times with the engine off, if they bottom-out by the third pump, they need to be bleed too. There are bolts w/ lock nuts at the top rear of the tranmissiion case where the axels attatch. in fact they oare in cut-outs in the axels. Loosen the lock nuts 1 turn; then the bolts 2 turns; then tighten the lock nuts; start the engine and hold the brake peddles all the way down for two minutes. While still holding the peddles down, loosen the lock nuts, tighten the bolts & lock nuts down. You'll need two people to do this because you can hold the brakes & tighten the bolts at the same time. Also, hold the brake peddles down with seperate feet and DO NOT have the peddles locked together, because when you get the bleeding bolts tight, the peddle "kicks- back " very quickly. Of course if bleeding doesn't fix the problem, you'll have to have the steering cloumn repaired by JD, because you need special tools to fix ans set it.
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