440A diff lock and losing hydraulics

[802hlake]

Noticed sometimes, but not always, when I kick in the diff lock whether by accident or on purpose i lose hydraulic pressure in both my blade and my steering cylinders. At first I thought it was because I was low on oil and I was. fixed a leak, filled it up, but still having this issue. maybe it's normal but I can't figure out what the connection between the two is. any insight?

[snowstorm]

Every one I know of did that. Only lock it in when you really need it

[coxy]

your lucky it even works everyone that I ran never worked 

[tacks Y]

So this is the way they should work? I assumed that oil flow shifted something or clamped up something so oil would not continue to flow? I should go read the book.   

[snowstorm]

didnt say they should. its just the way they are. its a closed center hyd system with a priority valve that didnt always behave itself. push the lock and most of the oil flow went to that also fill the housing with return oil. so if you had a leak in the ft axle and hadnt used the lock in some time it would appear to use oil