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140 hydraulic questions

H

hoopnitram

New User
My 140 has never had good hydraulics, enough to use though. Now the front rockshart will not lower till I lower the rear lift, I have to move the levers to get to low pressure.
When I pulled the screen, it was ok, but when I took out the drainplug, it was under pressure, would a head gasket do this?
Thank you,
Hoop
 
Hoop, I am personally a little confused.

140s do not have a "rear lift" either from the factory or as a common option. They have two front rockshafts, one of which is usually connected to a rod that moves a rear rockshaft. Is that what you have?

If not, then you have something that's aftermarket, and you'll need to describe it better.

I think the drain plug being under pressure is normal. You need to remove the fill plug to relieve the pressure first, or you end up covered in HyTran oil.

The touch control (which is what the hydraulic system is called) blue ribbon service manual is available at http://www.cleancomputes.com/Cub/Blue%20Ribbon%20Service%20Manuals/GSS-1024%20Touch%20Control/index.html
 
Hoop: Forget about Kirsch, I know what you talking about on rear hydraulics. You say the screen is clean. What is the condition of the hydraulic oil, clean or water saturated? Does the tractor have fast hitch with left side assist spring?

I some how have a feeling the two fron rockshaft are catching on one another. This may be why you have to lower the rear before front will lower. Does the hydraulic system have any external leaks? Does the hydraulic system loose oil, that you can't notice going?

I have a feeling the pump is not the best, but that doesn't explain having to lower one to get the other one to go down. Are you aware of the adjustment on the hydraulic levers.

Answer those questions, someone will figure it out.
 
Okay, what is he talking about then?

And no, don't "forget Kirsch." I posted a link to the service manual for the touch control. It has diagnostic tests for figuring out what is wrong.
 
I didn"t mean to start any trouble, when I said rear lift I meant, rear rockshaft I guess..
The oil was old, no water, some sediment in the bottom of the housing, what I would think is normal..
No fast hitch, but it has the assist spring, I made a 3 point for it like I built for my super a..
The unit is wet around the head area, not what I would call excessive, no drips..
I will disconnect the links from the rock shafts to check for any binding etc..
Can you walk me thru the stop clip adj?
The front has the cultivator assembly that I have a couple cultivator feet with 2 grader blades bolted to it.

Thank you for your time,
Hoop
 
Kirsch: It's not hard to figure out what he means by rear hydraulics. Plain and simple, it's the control that operates the rear hitch.

By the way, I have the Blue Ribbon Service manual in front of me. I also happen to know, some folks have done the touch control kit and in reassembly weren't careful enough, thus find the front rockshafts catching on each other. My first suggestion to Hoop, was try and determine if that is happening. If we can eliminate that, we'll go from there. By the way, Blue Ribbon Service manual does not mention rockshafts catching one another. They assume all technicians were perfect.
 
Hoop: First determine if those front rockshafts are catching on one another. You may have to take the fuel tank off and hook up a temporary fuel supply. It will give you a much better view of the rockshafts in motion.

Once you are sure nothing is catching, come back.
 
It's normal to have some pressure in the hydraulic reservoir. There is not a vent on the system so some pressure will build up. Always remove the fill plug first, removing the screen or the drain without first removing the fill plug to vent can result in a hydraulic fluid shower.
 
(quoted from post at 05:11:26 05/29/09) Hoop, I am personally a little confused.

140s do not have a "rear lift" either from the factory or as a common option. They have two front rockshafts, one of which is usually connected to a rod that moves a rear rockshaft. Is that what you have?
Click to expand...
Oh, come on, man! You know good and well what he is talking about....
mike
 
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