massey ferguson 175 extrenal hydraulics

Anonymous-0

Well-known Member
I have a 175 diesel M/F and I cannot seem to get the external hydraulics to function correctly - the 3 point lift works fine -but when I hook a double acting cylinder(using both lines) it will not extend or retract more than 2 inches. The cylinder and lines are new and the disc works with other tractors just fine. I have adjusted the 2 set screws as shown in the manual but still no improvement.
any suggestions or ideas would be greatly appreciated.
 
Does it have multi-power? and or IPTO? with nothing connected does it load the motor down when moving the levers?? With little info my first thought is your quick couplers. how heavy is your disc? have you tried useing another implement? Do you have a gauge you can stick in it? you should have 2500 psi.
 
I don't see anything on the tractor that says multipower ( don't know what that is ) the motor only loads down when the disc is hooked up ,the 3 point lift works fine.
I have new lines, new couplers and cylinder. I unhooked the cyl from the disc and the cyl still will not extend or retract more than 2-3 inches with no load. I don't have a gauge....
I hooked the disc up to a White 2-70 and it works perfectly - do not want to have to borrow neighbor's tractor to disc my place up tho....
When you engage the lever - the wheels on the disc
jump about 2-3 inches like they want to go, but stop-this is in either direction up or down, the hyd lines jump when the pressure hits them, either one depending on direction and then the motor loads down - it's like it's trying to work but can't
The disc is a 10 ft long, and the guy I bought it from was also using a 175 ferguson. He has since moved away and I cannot reach him to get advice on how his did with it - but I had seen it work with his tractor before I got it.
I am hoping it's just a minor adjustment maybe from a single acting cyl to a double acting one - but I have run out of ideas and giving out of want to's.I did not want to have to get a mechanic out here if I did not have to - so any suggestions or possible routes will be greatly appreciated.
Thanks again - Steve
 
Wasn"t concerned if another tractor could lift it. The problem is not the disc. hook the TRACTOR to something else. I think the quick couplers are the problem. Set the valve to double acting as the book shows. You need to get pioneer 8010 quick couplers. don"t overlook the simple things.....
 
You seem to have an oil supply out to the cylinder but no return or your return line is blocked either by not being plugged into the correct port or a faulty connector. Briefly try working the cylinder with the return hose held into an empty oil can or if the hose is long enough return it into the oil filler bung beside the gear levers, Try this with no connector on the hose. If that works then you need to trace your return pipe into the same spool valve that you are taking the oil feed from...(.if it is a double acting spool it will have two hoses.) Or turn the setting on your valve for double acting rams.I suspect you have the hoses plugged into 2 valves at once? or the connectors are not compatable.
Let us know how you get on......Sam
 
OK_ I have tried a different implement and still no improvement - I have a new cylinder, new Parker hoses and new Pioneer 8010 couplers as you mentioned - the disc is not pinned and I have turned the adjustment screws to every setting and combination imaginable with no improvement. I will try removing one end and seeing if the oil is moving through when I use the lever ....but again the couplers and cylinder work perfectly with the other tractor.
Thanks to all for the advice!!!!
 
Steve I was pretty sure it was your quick coupler, but There are a couple of things yo try. get you a hose plug into a coupler and the other end leave open, take off the fill cap and have someone work the valve, this is called a hillbilly flow test, no offense" do this on both couplers, Let"s see what it will do free flowing. A 5000psi gauge is only $40 and a small 1/4 hose 3500psi rating not to much.. Let me know what you find, we try not to leave you out in the cold... Another thing you can try is make a short hose with 2 male couplers and plug them in top to bottom, you should be able to feel flow going through it, or if you have a restriction it will or may load down the motor, are you with me?
 
if your motor loads you have pressure may not be the right amount,your problem sounds like something is wrong with your remote valve according to what you have already checked,I'm assuming your tractor has and auxiliary pump and not being furnished fluid from a diverter valve on the lift,remove the 2 lines that connect the valve to the transmission case,next take a hyd. hose with male coupling ends on both ends hook it into the couplers on the tractor this will make a continuous loop,take an air nozzle and blow air into the the pressure side of the valve that you disconnected from the transmission air should come out the other side ,now move the control handle to up or down position air should still flow thru the valve and hose and exhaust thru the open return port if not something is checking the flow,i had a male coupler ball spring to brake disc would only raise or lower a small amount then check,when it broke it couldn't hold the opposing ball off it's set and would check fluid flow
 

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