I'm have problem with the stack valve asembly. it started with the back of one of the peice bloking off, the part were change and put back togheter. After the i installed it started to have a lot of back pressure, enought to stall the engine. it run fine idling, and the front loader work fine. After starting it, everything on the hoe side work good for about 1 minute and after i have to barely touch the control to anything moving. I would say i can only move the control about 5% of their range, anything more will stall the engine. i have flow back to the tank so i know the low pressure line are clear. i have 3 gauge on the system, one on the supply to the hoe controll valve, then i have a other gauge in betwing the control valve and the loader control and the last one on the main return from the hoe control valve. is there any boddy had the same problem? any imput would be nice. Chris
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