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Need a Moline guru here


 
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neverfear
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PostPosted: Mon May 06, 2013 3:40 pm    Post subject: Need a Moline guru here Reply to specific post Reply with quote

Which way does the hydraulic jack go on the cultivator lift roll for a Z or U? Fixed yoke forward or back?
It seems to fit either way but just curious as to which way it was intended. Also when using the control for the lift, would the proper hose hookup be forward/up and back/down? Thank You
 
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Alan K
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PostPosted: Mon May 06, 2013 4:21 pm    Post subject: Re: Need a Moline guru here Reply to specific post Reply with quote

I believe they usually mounted them "fixed" end or bottom of cylinder to stationary end of the lifting roll, then the hydraulic hoses are kept stationary and dont move. They used a take up spring on the hoses which was hooked on the carburetor pipe on the Zs and on the intake manifold on the Us. It has been a while since Ive had mine mounted on the lifting roll for the cultivator but I believe the hose on the bottom or stationary end of the jack goes to the left side of the connecting block on the back of the tractor. That is the way it is on my ZA I believe. I think you are correct, forward is up and back is down as that would work for the depth control. Ill take a look in the manual to make sure.

 
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neverfear
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PostPosted: Mon May 06, 2013 4:33 pm    Post subject: Re: Need a Moline guru here Reply to specific post Reply with quote

Thanks Alan, I looked in the service manual for both tractors and didn't see anything.
Was there a separate manual for the cultivators
maybe it would be in there?
 
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Alan K
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PostPosted: Mon May 06, 2013 4:44 pm    Post subject: Re: Need a Moline guru here Reply to specific post Reply with quote

There is a separate manual for the cultivators which I think was mainly assembly and parts. Ill see if I can get a picture for you from somewhere. I think I still have one of those manuals.
 
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neverfear
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PostPosted: Mon May 06, 2013 5:18 pm    Post subject: Re: Need a Moline guru here Reply to specific post Reply with quote

LOL well yours is the best pic I've seen yet! I did the google search for images and came up with nothing that showed the cylinder side of the tractor.
I'll trust your advice on it as you have a complete set of cultivators on yours and it worked for you.
The reason this came up is I think I have a problem with a relief valve then if it's not my hose hookup.
I can retract the cylinder (push up on the handle), and when it reaches end of travel it kicks the lever to neutral as I would expect. When I extend the cylinder (pull back on the handle) it travels to the end and deadheads, pulling the engine down and will not release. The only way to release it is to kill the engine to relieve the pressure then I can move the handle to neutral.
I know this post is going off track now but maybe others are reading it. Thanks again Alan for the pic and advice.
 
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Alan K
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PostPosted: Mon May 06, 2013 6:44 pm    Post subject: Re: Need a Moline guru here Reply to specific post Reply with quote

Generally I think, think when that happens it might be some wear on the cam in the hydraulic reseroir with the valves that is going slighly over center and not letting it release back to neutral. Had that happen on dads once and he ended up taking the reservoir apart to release it. Does it do it when you dont have it mounted on the lifting roll? Possibly might be some binding in the lifting roll / linkage? I think if it goes all the way to the end of the stroke the lever might bind on the lifting roll as it is all the way back and would be stuck in that position and cant release back to neutral.
 
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Alan K
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PostPosted: Mon May 06, 2013 7:16 pm    Post subject: Re: Need a Moline guru here Reply to specific post Reply with quote

Here is a picture from the implement book I was talking about, dated 3-49. The more I think about yours Im guessing it is binding on the lifting roll when it completes the full stroke. I would try moving the lever to a lighter setting on the quadrant and see if that helps, which would only be probably half way on the stroke of the cylinder. When the hydraulic cylinder goes the full stroke on the lifting roll, the lever and linkage tilts slightly to the back and I dont think allows it to release. (for some reason I have two pictures of the same thing so you arent seeing double lol)


 
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Alan K
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PostPosted: Tue May 07, 2013 4:57 am    Post subject: Re: Need a Moline guru here Reply to specific post Reply with quote

Looked in the operation and maintenance manual on the Uni-matic lift. There is an adjustment on the linkage or rod that goes from the lever to the hydraulic reservoir. It is by the clevis on the reservior. You may need to adjust that shorter / longer to get the correct setting. I can post a picture later.
 
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FBH44
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PostPosted: Wed May 08, 2013 6:34 pm    Post subject: Re: Need a Moline guru here Reply to specific post Reply with quote

I have always thought the piston rod should point downwards, so water / rain / condensation drained away from the cylinder and seals.
 
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neverfear
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PostPosted: Thu May 09, 2013 3:12 pm    Post subject: Re: Need a Moline guru here Reply to specific post Reply with quote

Alan, You were absolutely on the right track when you spoke of the roll going all the way back and thus putting the cylinder over center.
When that happens it pins the handle back and makes it impossible to release. I was watching closely while I cycled it and had no problems til that cylinder went over center.
This may be helpfull to someone who is contemplating fabricating a three point on these tractors (I know I have).
Again, Thank You for your insight and experience it saved me from tearing apart that hydraulic box.
 
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Alan K
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PostPosted: Thu May 09, 2013 9:11 pm    Post subject: Re: Need a Moline guru here Reply to specific post Reply with quote

Welcome. Was nothing special, just remembered mine kind of did that. Glad you got it figured out.
 
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