Hey guys. I have a ford 600 that was hiccupping about every 45 seconds when the lift was raised. The lift actually worked pretty good however I discovered the pump was not pumping very well 100% of the time. I took the pump and had it rebuilt completely. Now for the fun part. As I was asking around about the hiccup situation while the pump was in for repair, I was advised to mix 90 wt oil in with the 303 tractor hydraulic fluid that I was using to maybe thicken the viscosity of the oil and maybe slow down the hiccups. Well I got he pump back on this morning, and it seems to be working well.(barb fitting and hose back to tank). However I now have no lift response at all. I put air pressure in the dipstick hole but no luck. My question is this. Do you think the 90 wt oil mix thing was a bad idea. Is it just too thick to make it through the system? If so what is best to use once I get all that other stuff mostly out as good as I can? It sort of points to the oil thickness since the lift was working before. Any help would be appreciated. Oh one more thing. I mixed a gallon of 90 wt oil in with about 5 qts of 303 hydraulic oil in the hydraulic reservoir.