743 not lifting

[Dan O]

My AUX line blew out and I didn't know it and burned up my lift pump, I installed a new pump but now it will raise and lower but will raise about two feet with a load in the bucket and sounds like it's bypassing any help would be nice thanks

 

[Tazza]

I wonder if you have rubbish stuck in the main relief valve when the pump went out? The relief screse into the control valve.
Did the pump just wear and not breat vanes?

 

[willett]

I just resealed the control spool on my 743 and had a similar problem. Couldn't get boom or tilt to move much. Try cycling your aux hydraulics by shifting the right stick left and right. I think air gets trapped in the lower portion of the spool and it airlocks the spool. I did it on mine with the aux lines deadheaded and voila, I had functions again.