Posted by Inno on August 24, 2013 at 12:44:31 from (174.89.115.12):
In Reply to: any educated guesses posted by 1948jr on August 23, 2013 at 20:03:15:
When you pick up the arms by hand do they fall right back down? On the top cover, on the right side, just in front of the seat there is a rectangular cover. That cover has a pipe which goes down and seats into the hydraulic pump and transfers the fluid from the pump, up to the hydraulic cylinder to lift the arms. If you were to remove the cover (just two bolts) and pry it out, there are o-rings both on the end that seats into the pump and one where it bolts to the lift cover. Those could be gone.......it's unlikely to be that simple but you never know. Also with that pipe removed you can have a look inside (with the inspection cover removed) while you raise the lift lever and see if any fluid shoots out of the pump. You may need a mirror and flashlight to do this.
Later models will have a filter on the hydraulic pump, I'm not sure if you can get to it without removing the lift cover. If it's plugged up you won't get much movement........not sure if that would cause it to not lift at all but it's a possibility.
Failing all the simple things, you will have to remove the lift cover. Remove all the bolts around the perimeter of the lift cover and get someone to help you with lifting it off, it's heavy! Or if you have a hoist of some sort. It can be done with one person but it's not the wisest thing to do. Be careful when lifting it so as not to damage the control arms which extend downward and engage with the pump.
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