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  1. wheelhorse-c-161-1979

    ARK 550 hydro question

    I have a Ark 559 on my 1973 auto 18.. The ark operates very well an goes through all the motions. It lifts very well and the bucket had power in the bucket up mode as well as the bucket down mode. However the main lifting arms seem to have power only in the lift mode and passively go down without much down strength besides the weight of the whole assembly. Is that normal by design or are one of my hydro lines not working. I discovered this the other day when ripping out some bushy vines. I could unearth the vines by lifting them. But when I tried to pull the arm down to pull the vines the arm didn't seem to want pull down with any additional strength besides gravity. Wondering if any one has thoughts on this. Thanks!
  2. Well as I fix one thing on my good ol' 1973 auto 18, the next weakest link needs attention. The tractor an ARK 550 was working like a charm as I moved chords of wood from on old oak that had fallen. Then all of a sudden when I engaged the clutch lever on the left side of the tractor, to engage the hydro pump powering the ARK 550. The FEL stays down. No motion at all. It appears that the pulley that is some type of clutch directly off of the front of the engine doesn't engage and drive the belt anymore. I'm not sure exactly what the protocol is. So before I make things worse wanted some feedback on someone who went down that road. I took a few pics of the problem area. What do I take apart and where do I start? Thank you again for your guidance and wisdom! Jack
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