3 point backhoe hydraulics

[used red MN]

Yes, sorry about that. The hoses for the backhoe have a pointed depressor and the hoses for the loader (on the tractor) are a smooth ball. I'm going to unhook the hoses from the backhoe valve and see if they're even getting fluid. I didn't think that would matter, but after all the suggestions on here, I'm going out to try that here in a little bit.

It would be a good idea to clean the rust off of those male coupler fittings for the hoe before you do any testing for fluid flow.

 

[Ohtuckian2025]

The screws operate a switch valve for each spool. Fully out is for single acting cylinders and the drop port is to be plugged. I am guessing the valve with one port capped off is set for single acting and operates the loader lift cylinders. The screw turned fully in is for double acting cylinders. That should be the spool operating the bucket cylinder.

Is there a way somebody could identify the screws in one of my pictures? I do not know what screws you guys are talking about.

 

[used red MN]

Is there a way somebody could identify the screws in one of my pictures? I do not know what screws you guys are talking about.

Jim, who is more familiar with your tractor’s setup seems to be away from his computer right now. As long as you do your flow tests connected to the remote that had two hoses plugged in it that should give you a valid test. I am going to look at the MF (AGCO) parts site to find the single/double action switching “screws” to point them out to you.

 

[used red MN]

Jim, who is more familiar with your tractor’s setup seems to be away from his computer right now. As long as you do your flow tests connected to the remote that had two hoses plugged in it that should give you a valid test. I am going to look at the MF (AGCO) parts site to find the single/double action switching “screws” to point them out to you.

Sorry, I can’t find a clear description in the parts diagrams of the “screws” mentioned. Your remote valve looks different from what I see in the parts book. I believe this is because your tractor has an optional “Auxiliary” system as Jim mentioned.

 

[1948CaseVAI]

I have a 1968 Massey Ferguson 175 with a Perkins diesel engine. It has two hydraulic circuits on it. I recently bought a Grizzly BH105 backhoe for it. Apparently, Grizzly has gone out of business so I can't get help from them. I was told that I could just hook up the hydraulic hoses from the backhoe to one of the tractor hydraulic circuits and tie the lever back. When I do that it just deadheads. I know the hydraulics work because I have a front loader on it and it works like it's supposed to. The front loader uses both hydraulic quick disconnects, so I have to unhook the curl cylinder and use that circuit for the backhoe. Can someone guide me on how to hook up the hydraulics on an old tractor?

Grizzly tools is alive and well at grizzly.com. Maybe you are looking for a different Grizzly, but the tool manufacturere is dong fine.

 

[used red MN]

I'm going to unhook the hoses from the backhoe valve and see if they're even getting fluid. I didn't think that would matter, but after all the suggestions on here, I'm going out to try that here in a little bit.

Let me add, to get the hoses to plug in properly you need to grab the hose or coupler on the tractor side and pull it back towards you so it extends out of its mounting enclosure. Then push the tip on the equipment hose into the coupler. You may have built up pressure in the tractor side circuits when you tried functioning it and it deadheaded on you. With the engine off move the lever back and forth to release this pressure to help you couple the hoses properly. Also you should check the hoses that you are plugging in for residual pressure. Push the tips or balls firmly against a metal part of the tractor wrap a rag around it to catch the fluid and contain it from spraying on everything. Keep your hand back from the end, fluid under high pressure can inject into your skin. This is a very good thing to keep in mind when you encounter any type of hydraulic leak. I know a farmer from my hometown that had this happen and he had to have his hand and part of his arm amputated.

 

[used red MN]

Grizzly tools is alive and well at grizzly.com. Maybe you are looking for a different Grizzly, but the tool manufacturere is dong fine.

I don’t think the company you are referring to is the company that built his backhoe. The hoe he has was built in Jacksonville, IL. Grizzly.com takes me to a site that looks like a “Harbor Freight” style company for wood working equipment and shop tools. I also found a company that uses the Grizzly name that is a “global” supplier of what looks to me to be “off brand” foreign built industrial equipment. Also an Australian farm equipment company and a “wheel to track” conversion company use that name.

 

[buickanddeere]

Yes, a PTO pump is expensive but it will be much faster than the 175 hydraulics

How fast should a backhoe be ? 1300rpm is faster than what can be controlled on a 10A Deere .

 

[Jim.ME]

Is there a way somebody could identify the screws in one of my pictures? I do not know what screws you guys are talking about.

 

[Ohtuckian2025]

View attachment 140493 View attachment 140494

Thank you very much for identifying the screws!

 

[Ohtuckian2025]

Grizzly tools is alive and well at grizzly.com. Maybe you are looking for a different Grizzly, but the tool manufacturere is dong fine.

Grizzly Tools is NOT the proper website. I have found that they are no longer in business, therefore, no website.

 

[Jim.ME]

Thank you very much for identifying the screws!

The fact that I see a cap on the dump port of the right spool's ports indicates that is the spool you use for your single acting loader lift cylinders.

The left spool would be the double acting one (both ports have hoses). It is very likely the screws for the switching valves are set properly, if your loader worked properly.

This appears to be coming down to the quick connects are not into the left side couplers correctly and possible hose issues as has been mentioned several times.

 

[Ohtuckian2025]

Well, guys, I feel like a complete idiot! I knew from the get-go that the hose ends were different, but I didn't think it mattered. It does! On the left is the hose end that came on the backhoe and the one on the right is what the tractor needs. I purchased 2 new hose ends and everything works as it should. However, one of the hoses blew out almost instantly. I will have to replace all the hoses because they're all in terrible shape. Looks like this thing has sat outside it's whole life. Anyway, I sincerely appreciate all the comments and suggestions! I've learned a lot!

 

[Jim.ME]

Well, guys, I feel like a complete idiot! I knew from the get-go that the hose ends were different, but I didn't think it mattered. It does! On the left is the hose end that came on the backhoe and the one on the right is what the tractor needs. I purchased 2 new hose ends and everything works as it should. However, one of the hoses blew out almost instantly. I will have to replace all the hoses because they're all in terrible shape. Looks like this thing has sat outside it's whole life. Anyway, I sincerely appreciate all the comments and suggestions! I've learned a lot!

Proper, matching couplers are important. Glad you got it.

I still recommend you get the 2 Operator's Manuals and service manual for your tractor. You can use the online parts book. Watching eBay may be the best chance of finding a manual for the backhoe. Whatever loader you have, will have its own manual.

 

[Ohtuckian2025]

Proper, matching couplers are important. Glad you got it.

I still recommend you get the 2 Operator's Manuals and service manual for your tractor. You can use the online parts book. Watching eBay may be the best chance of finding a manual for the backhoe. Whatever loader you have, will have its own manual.

Yes, I bought the MF175 operator's manual off ebay but not the service manual. I didn't know if the service manual is worth buying. I really appreciate all your suggestions! Very helpful!

 

[Ohtuckian2025]

The fact that I see a cap on the dump port of the right spool's ports indicates that is the spool you use for your single acting loader lift cylinders.

The left spool would be the double acting one (both ports have hoses). It is very likely the screws for the switching valves are set properly, if your loader worked properly.

This appears to be coming down to the quick connects are not into the left side couplers correctly and possible hose issues as has been mentioned several times.

You are correct on all statements. Thank you for your input!

 

[Jim.ME]

Yes, I bought the MF175 operator's manual off ebay but not the service manual. I didn't know if the service manual is worth buying. I really appreciate all your suggestions! Very helpful!

Most of the info you will need if you have hydraulic issues with your tractor's hydraulic systems will be in the Hydraulic System Operator's manual and the service manual. Your choice, mine is to get the manuals for my tractors.

 

[Ohtuckian2025]

Let me add, to get the hoses to plug in properly you need to grab the hose or coupler on the tractor side and pull it back towards you so it extends out of its mounting enclosure. Then push the tip on the equipment hose into the coupler. You may have built up pressure in the tractor side circuits when you tried functioning it and it deadheaded on you. With the engine off move the lever back and forth to release this pressure to help you couple the hoses properly. Also you should check the hoses that you are plugging in for residual pressure. Push the tips or balls firmly against a metal part of the tractor wrap a rag around it to catch the fluid and contain it from spraying on everything. Keep your hand back from the end, fluid under high pressure can inject into your skin. This is a very good thing to keep in mind when you encounter any type of hydraulic leak. I know a farmer from my hometown that had this happen and he had to have his hand and part of his arm amputated.

Thank you for your suggestions. I changed the quick disconnect fittings and it all works as it should. I appreciate your input.

 

[Ohtuckian2025]

It might kink it, but 2000 psi +/- shouldn't deadhead against a kink. However, I agree, replace that hose before it blows oil all over you and your shop!

You called it! As soon as I changed out the hose couplers on the backhoe and activated the left outrigger, the hose blew and even though I was a few feet away, it got me in the face. No harm though, just annoying. Believe it or not, I was wearing safety glasses and that helped prevent it from squirting me in the eyes.

 

[Tractorcedric]

I would appreciate some pictures. I would be interested in buying it from you because I will need an extra circuit to be able to use the front loader and the backhoe without having to change the hoses around everytime I use it.