Oliver 1650 hydraulics won't lift at times

RD1970

New User
So I have a 1650 Oliver I bale with when i'm running my haybine starting out I can lift and lower fine but as the day goes on tractor gets hotter at times I can't pick the mower up? Makes kind of a growling noise when the lever is moved. If I bring the rpm down it will start to raise then I raise the rpm goes up normal the next 2 -4 times then it will do it again? Is this an adjustment or something to do with one of the bypass valves. I've been just working with it but it's very annoying.
 
My 1550 (same system) used to do that. Try to raise the MoCo and would have to pull the lever two or three times to get it to lift. I know my pump is a little weak. Last year I put a gauge on it and it was only 14-1500 psi. I added a couple of washers to the relief valve and got it up to 2000, works fine.
 
My 1550 (same system) used to do that. Try to raise the MoCo and would have to pull the lever two or three times to get it to lift. I know my pump is a little weak. Last year I put a gauge on it and it was only 14-1500 psi. I added a couple of washers to the relief valve and got it up to 2000, works fine.
Thank you for the info Was yours doing it sporadic as well. Mine doesn't do it constantly. What relief valve and what kind of washer and where did you add them? Ive been reading my Manuel and it looks like they reference maybe 3 bypass/relief valves as well as some bleeders. It also mentions some need adjusted at times.
 
The system relief looks like a large bolt head on the right side of the housing toward the front and top. Spring inside that forces the valve against the seat. There are spacer washers to adjust the force. I just found some plain washers the right OD and added one at a time not knowing how it would affect the pressure. I have a 3000 psi gauge. I think I added three before I got it where I wanted it. The manual says .010shim should raise the pressure 75 psi. First picture is the relief valve, small plug in the second is the pressure test port, large is the filter relief bypass. Leave it be.
 

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The system relief looks like a large bolt head on the right side of the housing toward the front and top. Spring inside that forces the valve against the seat. There are spacer washers to adjust the force. I just found some plain washers the right OD and added one at a time not knowing how it would affect the pressure. I have a 3000 psi gauge. I think I added three before I got it where I wanted it. The manual says .010shim should raise the pressure 75 psi. First picture is the relief valve, small plug in the second is the pressure test port, large is the filter relief bypass. Leave it be.
Ok so if I'm looking at this correct the valve that you put the washers in on mine has a jam nut on it and my manual says to turn it all the way in when using double actuating cylinder and back it out 4-5 turns when running single actuating cylinders?
 
Ok so if I'm looking at this correct the valve that you put the washers in on mine has a jam nut on it and my manual says to turn it all the way in when using double actuating cylinder and back it out 4-5 turns when running single actuating cylinders?
Sounds like you don't have an operator's manual. Yes, but that's the bypass valve, opening it will disable the lift arms. It needs to be opened only if you're using a single acting cylinder. The relief is the large one toward the front and higher up. If your haybine has a single acting cylinder you also need to open the bleed screw three turns and tighten the locknut and adjust the restrictor to regulate the drop speed. OP manual explains it all, get one.
 
Bleed screw in the center, open three turns. Restrictor valve is lower left. The long nut is my modification due to leaky seal nut. Yours will have the same nut as the bleed screw.
 

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Sounds like you don't have an operator's manual. Yes, but that's the bypass valve, opening it will disable the lift arms. It needs to be opened only if you're using a single acting cylinder. The relief is the large one toward the front and higher up. If your haybine has a single acting cylinder you also need to open the bleed screw three turns and tighten the locknut and adjust the restrictor to regulate the drop speed. OP manual explains it all, get one.
Ok I seen that large head bolt forward of the bypass. I have a shop manual not an operator manual. I was trying to find one to download but haven't been able to. The haybine and really everything I have has double acting cylinders except maybe my old disc
 
The system relief looks like a large bolt head on the right side of the housing toward the front and top. Spring inside that forces the valve against the seat. There are spacer washers to adjust the force. I just found some plain washers the right OD and added one at a time not knowing how it would affect the pressure. I have a 3000 psi gauge. I think I added three before I got it where I wanted it. The manual says .010shim should raise the pressure 75 psi. First picture is the relief valve, small plug in the second is the pressure test port, large is the filter relief bypass. Leave it be.

I can't find what the pressure is supposed to be. One noted 2600 psi.
I think I have good pressure for the bucket, can lift the tires as far as I can move the bucket.
I had one tire with a slow leak. I wondered, how am I going to lift the front end? That end loader is all heavy in the front and makes the tractor weigh 10,460 pounds. So I tried the bucket. I was amazed.

Here's just a little. Lifts the tires and pulls the tractor forward - see tread marks in dirt.



View attachment 80376
 
I can't find what the pressure is supposed to be. One noted 2600 psi.
I think I have good pressure for the bucket, can lift the tires as far as I can move the bucket.
I had one tire with a slow leak. I wondered, how am I going to lift the front end? That end loader is all heavy in the front and makes the tractor weigh 10,460 pounds. So I tried the bucket. I was amazed.

Here's just a little. Lifts the tires and pulls the tractor forward - see tread marks in dirt.



View attachment 80376
2200 at full throttle.
 

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