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cub hydraulics problems

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Jon Schenk

11-14-2003 18:23:57




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When I lift my hydraulics on my cub (with nothing hooked up)my tractor sounds like it is pulling in the heaviest class in a tractor pull. Does anyone know what the problem is???

Thanks Jon <><




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Gary-Miss

11-15-2003 07:20:51




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 Re: cub hydraulics problems in reply to Jon Schenk, 11-14-2003 18:23:57  
You didn't mention how old your cub is. The early ones had metal valvs which didn't give any problems. The later models, along with 140's etc, have plastic valves which did give problems, particularly when the lever was out of adjustment and kept the system in a limit or when equipped with a fast hitch which was quite often overloaded. Anyway, buy a kit for the unit, remove it from the tractor, remove the lift arms from the front and remove the cylinder head. I would suggest using a camcorder and talk to yourself while removing parts so you don"t get one of the valves in backward. It's sinmple to work on, but, it can happen. There are two small valves that come out easily. These hold it in the up position or the down position. Isuspect the plastic in one of these is bad. While there, the pressure control valve has a plastic valve at the back side thta sometimes has a hole punched in it. If this happens, it stays on "high pressure" all of the time and with a good hydraulic pump with actually kill the engine unless you keep moving the lever back and forth. While you are there, pull the control valve out the front side of the unit, fashion a tool out of a welding rod and remove the O ring around the control valve and replace it. They are the major source of oil leaks. That should do it. Good luck. I don't think I left anything out. If I did, hopefully someone will correct me on it.

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Jon Schenk

11-15-2003 16:48:14




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 Re: Re: cub hydraulics problems in reply to Gary-Miss, 11-15-2003 07:20:51  
My cub is a 1948



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Gary-Miss

11-15-2003 18:09:21




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 Re: Re: Re: cub hydraulics problems in reply to Jon Schenk, 11-15-2003 16:48:14  
That should be too eaerly for the plastic valves unless it was retrofitted. I still suspect your problem as being in one of those two check valves. They are the same valves, they just go in in opposited directions. The problem should be easily seen once you get in there.



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