3-Point Hitch 169D 3 point hitch is weak

[Johndeere3720]

After 6 pages I encourage you to go back to post #6 and try this test. Based on the suddenness of your problem I do not believe your problem is your fluid and screen. Not saying it doesn't need to be addressed. I have read more than 1 thread of a sheared pump key and the friction between the pump coupling and drive shaft turning the pump enough to put up just a little flow. I cannot see how you can do harm if you try my suggestion. :thumbsup:

I would have never thought of that. :confused2: i will have to check that out. thanks! :thumbsup:

 

[Johndeere3720]

Well, i am getting ready to go work on my YM169D here pretty quick and have yanmar going through my mind since I just finished drawing a YM1610D and scanned it onto my computer. :thumbsup: i will let y'all know how it goes.

 

[Ginormous]

Well, i am getting ready to go work on my YM169D here pretty quick and have yanmar going through my mind since I just finished drawing a YM1610D and scanned it onto my computer. :thumbsup: i will let y'all know how it goes.

Nice drawing. :thumbsup:

 

[Johndeere3720]

Nice drawing. :thumbsup:

Thanks!

 

[Johndeere3720]

I just got back from the farm from working on my tractor. The first thing I did was I drained out the hydraulic oil which hadn't been changed in a while and then commenced to remove the hydraulic pump. Once I pulled off the pump I noticed that it is not a keyed pump, it has a long bolt on the end and turns with the engine. So i put it all back together. By then, all the hydro oil had been drained so I pulled the rear wheel off and got out the hydraulic filter. It has residue from gasket maker on it and it did have some metal shavings. Part of those shavings are from the hydraulic dip stick but the rest i don't know. :confused2: So i washed the filter in a coffee can of Diesel and used the air compressor and blew it clean. Then I reinstalled it and put in the new hydraulic fluid to test the hydraulic pressure i was getting. We first hooked up the gauge to the hydraulic port under my shift lever and found that there is 0 psi with the 3 point in float and 500 psi under no load. We got it to 1000 psi with 450 pounds on it but it would not lift the weight. Then we hooked the gauge to the line that feeds into the cylinder and got 3000 psi so that means the pump is good. That also means I have a seal out in the cylinder so now I have a general idea where to start really taking stuff apart.

 

[winston1]

How did you get the 3000#? You pretty much had to have something dead headed to do that.

 

[clemsonfor]

If he put the gauge on the pressure line from the pump to the valve he did dead head it as there is no bypass, in that setup!

 

[Johndeere3720]

How did you get the 3000#? You pretty much had to have something dead headed to do that.

Yes, it was dead headed. On the hydro ports we got up to 1000 psi under load.

 

[clemsonfor]

How did you get the 3000#? You pretty much had to have something dead headed to do that.

If he put the gauge on the pressure line from the pump to the valve he did dead head it as there is no bypass, in that setup!

Yes, it was dead headed. On the hydro ports we got up to 1000 psi under load.

I just got back from the farm from working on my tractor. The first thing I did was I drained out the hydraulic oil which hadn't been changed in a while and then commenced to remove the hydraulic pump. Once I pulled off the pump I noticed that it is not a keyed pump, it has a long bolt on the end and turns with the engine. So i put it all back together. By then, all the hydro oil had been drained so I pulled the rear wheel off and got out the hydraulic filter. It has residue from gasket maker on it and it did have some metal shavings. Part of those shavings are from the hydraulic dip stick but the rest i don't know. :confused2: So i washed the filter in a coffee can of Diesel and used the air compressor and blew it clean. Then I reinstalled it and put in the new hydraulic fluid to test the hydraulic pressure i was getting. We first hooked up the gauge to the hydraulic port under my shift lever and found that there is 0 psi with the 3 point in float and 500 psi under no load. We got it to 1000 psi with 450 pounds on it but it would not lift the weight. Then we hooked the gauge to the line that feeds into the cylinder and got 3000 psi so that means the pump is good. That also means I have a seal out in the cylinder so now I have a general idea where to start really taking stuff apart.

Your pump was good! Is it anymore? Did is shear?

 

[Johndeere3720]

Your pump was good! Is it anymore? Did is shear?

No, it did not shear. The tractor was shut off after 2 seconds of running. The main objective was to see if the pump was working as it should. :thumbsup: