Marinemammal
Bronze Member
- Joined
- May 4, 2021
- Messages
- 50
- Location
- Oregon
- Tractor
- Ford 1700, Massey Ferguson 175, Wood Mizer LT15
Bypassing the the relief valve makes the 3-point work. Haven't figured out where to plug in the power steering yet.
JC-jetro
Elite Member
That's good. Pump was a major headache. No , I'm good. I like challenges like this. I wonder if a salvage relief valve can be sourced. I'll check a bit. So far so good. keep us up to date.
I found it. it was sold for $85. They are very proud of their parts, kind of pricey. They have whole bunch of used parts.
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Marinemammal
Bronze Member
- Joined
- May 4, 2021
- Messages
- 50
- Location
- Oregon
- Tractor
- Ford 1700, Massey Ferguson 175, Wood Mizer LT15
I found one on Ebay for about the same price, and have asked the seller to send photos of the insides of it--especially that hole. However, I think the tractor will function fine, if not better, plumbed like I have it with the pump going directly to the loader valve and then from the loader valve to the 3-point control valve through that block. I am going to try include the power steering in that plumbing scheme too. It steers very hard without power steering. That second block was a way to send more oil to the loader than to the steering, but maybe that won't be necessary if the steering oil comes from the loader return line.
I had an older Kubota tractor that had a metal side plate that allowed access to the clutch and had a zerk for the release bearing. I put a new clutch and pressure plate and bearing in this 1700 a couple years ago.
I had an older Kubota tractor that had a metal side plate that allowed access to the clutch and had a zerk for the release bearing. I put a new clutch and pressure plate and bearing in this 1700 a couple years ago.
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JC-jetro
Elite Member
Please post the pic as I a really am interested to see. it sound goods. I use my tractor relatively hard but due to price and availability ofn part I try my best not to abuse it as I don't intend to part with it anytime soon. keep us posted.
Marinemammal
Bronze Member
- Joined
- May 4, 2021
- Messages
- 50
- Location
- Oregon
- Tractor
- Ford 1700, Massey Ferguson 175, Wood Mizer LT15
I haven't quite got it figured out. If I plumb the power steering in series with the loader valve with its relief valve, then the 3 point would be down stream and unprotected by a relief valve. So if I try to pick up something too heavy on the 3-point it could self destruct. I can try to get the old relief valve machined back to working or get another generic relief valve to be between the loader valve and the 3-point.
I know this because when I tried the test with the position sensor removed it pegged the gauge and stalled the tractor.
I know this because when I tried the test with the position sensor removed it pegged the gauge and stalled the tractor.
JC-jetro
Elite Member
Yup . Agreed. You must have the main relief to work to protect all. Now, you do have max 3-point height lever stop (adjustable). I have adjusted that notch bracket thing just short of highest point. You can move the max rest up and down. Have you messed with that?
You can adjust the high and low resting place of the lift arm
You can adjust the high and low resting place of the lift arm
Marinemammal
Bronze Member
- Joined
- May 4, 2021
- Messages
- 50
- Location
- Oregon
- Tractor
- Ford 1700, Massey Ferguson 175, Wood Mizer LT15
I have set those movable resting places. Everything is fine with the 3-point if the lever is not put into the upper notch.
I have improved the hydraulics by plumbing the power steering after the loader valve. I think the power steering might have its own relief valve since when the wheels are cranked all the way, the gauge does not exceed 1500 psi. That's similar to when the bucket is curled all the way.
I haven't heard back from the Ebay seller yet and I think the machining of my old valve might not work and would cost a minimum of $100. I was thinking I could find an external relief valve that I could plumb in just following the loader valve. I have looked around on line but haven't found anything yet.
I use this tractor to pull and lift logs for our sawmill and running a brush hog. I also have the MF 175 for the heavy lifting and running the winch for logging. I won't be trying to lift anything heavy with the 3-point until I get the relief valve issue resolved. Hopefully, if it overloads, it would blow out a hose or that piston seal before breaking anything.
I have improved the hydraulics by plumbing the power steering after the loader valve. I think the power steering might have its own relief valve since when the wheels are cranked all the way, the gauge does not exceed 1500 psi. That's similar to when the bucket is curled all the way.
I haven't heard back from the Ebay seller yet and I think the machining of my old valve might not work and would cost a minimum of $100. I was thinking I could find an external relief valve that I could plumb in just following the loader valve. I have looked around on line but haven't found anything yet.
I use this tractor to pull and lift logs for our sawmill and running a brush hog. I also have the MF 175 for the heavy lifting and running the winch for logging. I won't be trying to lift anything heavy with the 3-point until I get the relief valve issue resolved. Hopefully, if it overloads, it would blow out a hose or that piston seal before breaking anything.
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JC-jetro
Elite Member
I have set those movable resting places. Everything is fine with the 3-point if the lever is not put into the upper notch.
Good, I lowered the upper notch just a tad , or enough when I put the lever there the relief would not chatter. It clearly identifies limit without me worrying about it.
I have improved the hydraulics by plumbing the power steering after the loader valve. I think the power steering might have its own relief valve since when the wheels are cranked all the way, the gauge does not exceed 1500 psi. That's similar to when the bucket is curled all the way.
That's good . It mostly does. On my Kubota the steering is hydro-static and it does have relief. The difference is the hyd pump is tandem and one input shaft feed two pumps sandwich together and smaller one is just for steering and the bigger GPM one is for the 3 point and the loader.
I haven't heard back from the Ebay seller yet and I think the machining of my old valve might not work and would cost a minimum of $100. I was thinking I could find an external relief valve that I could plumb in just following the loader valve. I have looked around on line but haven't found anything yet.
I might look a round myself for a relief device. I kind of like "Redneck Engineering" and been accused of being the master of it by few of my colleagues
. I am thinking outload here but a guy can put a HF uni-bit in a drill press, make a jig out of 2x4 to keep the relief square and plumb, mount the jig with the valve on the drill press rest, line things up, steady it with clamps and then slowly lower the drill to make the wallowed hole nice and round and also conical to accept the tappet. I think the idea has some merit and what do you have to lose anyway?
I use this tractor to pull and lift logs for our sawmill and running a brush hog. I also have the MF 175 for the heavy lifting and running the winch for logging. I won't be trying to lift anything heavy with the 3-point until I get the relief valve issue resolved. Hopefully, if it overloads, it would blow out a hose or that piston seal before breaking anything.
That makes sense, and lowering the resting notch should help some. Did the Ebay guy send you the picture to see geometry of the hole in the relief?
Good, I lowered the upper notch just a tad , or enough when I put the lever there the relief would not chatter. It clearly identifies limit without me worrying about it.
I have improved the hydraulics by plumbing the power steering after the loader valve. I think the power steering might have its own relief valve since when the wheels are cranked all the way, the gauge does not exceed 1500 psi. That's similar to when the bucket is curled all the way.
That's good . It mostly does. On my Kubota the steering is hydro-static and it does have relief. The difference is the hyd pump is tandem and one input shaft feed two pumps sandwich together and smaller one is just for steering and the bigger GPM one is for the 3 point and the loader.
I haven't heard back from the Ebay seller yet and I think the machining of my old valve might not work and would cost a minimum of $100. I was thinking I could find an external relief valve that I could plumb in just following the loader valve. I have looked around on line but haven't found anything yet.
I might look a round myself for a relief device. I kind of like "Redneck Engineering" and been accused of being the master of it by few of my colleagues
. I am thinking outload here but a guy can put a HF uni-bit in a drill press, make a jig out of 2x4 to keep the relief square and plumb, mount the jig with the valve on the drill press rest, line things up, steady it with clamps and then slowly lower the drill to make the wallowed hole nice and round and also conical to accept the tappet. I think the idea has some merit and what do you have to lose anyway?I use this tractor to pull and lift logs for our sawmill and running a brush hog. I also have the MF 175 for the heavy lifting and running the winch for logging. I won't be trying to lift anything heavy with the 3-point until I get the relief valve issue resolved. Hopefully, if it overloads, it would blow out a hose or that piston seal before breaking anything.
That makes sense, and lowering the resting notch should help some. Did the Ebay guy send you the picture to see geometry of the hole in the relief?
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Marinemammal
Bronze Member
- Joined
- May 4, 2021
- Messages
- 50
- Location
- Oregon
- Tractor
- Ford 1700, Massey Ferguson 175, Wood Mizer LT15
I should try hooking something heavy (like the brush hog) to the 3-point to see the response. Just standing on it while raising shows a slight increase in pressure. I have a gauge permanently plumbed in for at least while there is no relief on the 3-point.
Still no word from Ebay--maybe today. I think oil was running underneath the removable seat so the machinist would have to fill it and flatten it and then drill a new hole. The end where the seat rests isn't flat anymore, I think. If oil was getting by the poppet I don't think the hole would have gotten out-of-round. Anyway, it all works when that relief valve is out of the circuit.
The photo is the hose connection to the hydraulic pump outlet. That hose runs to a T with a gauge and then into the loader valve inlet.
Still no word from Ebay--maybe today. I think oil was running underneath the removable seat so the machinist would have to fill it and flatten it and then drill a new hole. The end where the seat rests isn't flat anymore, I think. If oil was getting by the poppet I don't think the hole would have gotten out-of-round. Anyway, it all works when that relief valve is out of the circuit.
The photo is the hose connection to the hydraulic pump outlet. That hose runs to a T with a gauge and then into the loader valve inlet.
JC-jetro
Elite Member
Ok. Looks good. One thing is if the oil leaks by at the relif, and if the rate of leakage is less that the pump GPM, then some flow would be available for 3-point. At what pressure? it would be just a guess unless you measure it. It is a great idea to be situationally aware of what's going on with the pressure by being able to monitor it live. You certainly are in a better place than couple of weeks ago.
