Counterbalance for backhoe on MF-202

[mrcaldwell]

Hoe is a 220, serial 2805, Loader 102M serial 29397? (hard to read)

 

[Jim.ME]

Below are the publication numbers that the AGCOpubs web site shows for your models. The manuals are for sale there, or use the numbers to find them elsewhere. The M and digit suffix identify printings, the base number is the most important one. Here is a link to the site:

AGCOpubs

The online parts books are free to use at:

AGCO parts

Click on Parts Book and use your model number in the search box on the Parts Book page, to get your book.



220 backhoe
Operator's manual publication # 690401M4
Parts book publication # 651157M92
Service Manual publication # 1448552M1

102 Loader
Operator's manual publication # 690379M3
Parts book publication # 651095M91
Service Manual publication # 1448551M1

202 tractor
Operator's manual publication # 690503M2
Parts book publication # 651104M94
Service Manual publication # 1448800M92 (assembled book)
Service Manual publication # 1448800M1 (packet - pages and dividers not assembled in a 3-ring binder, you supply your own, saves money)

 

[mrcaldwell]

i all, I'm back with (surprise surprise) more issues. Sorry for the long silence, but have been struggling with a few things. But, I finally hired a guy to help with the power steering issues. Not the sharpest stick, but he did help and that seems to be working fine.

I replaced all of the seal in the backhoe valve body and many of the hoses that support the backhoe. My issues are now with a couple of the valves which were working properly before I added more fluid. My issues are with two of the valves, the two end ones (boom lift and left "outrigger").

The boom lift goes up as expected, but the valve does not want to travel the other way to lower the boom. If I really lean on it, it eventually bleeds itself down. If I work it back and forth, the valve starts to work normally, but as soon as I let it sit or work another valve it returns to not wanting to move. The outrigger valve has the same issue. FWIW, the valves are on the outside of the valve block where the fluid should be coming in and out.

Full disclosure, I'm sure I added too much fluid to the system - at one point fluid was shooting out of the air vent at the fill tube. I removed what I could with a siphon, but I'm sure there's still a gallon or so too much. So my questions:

Is my issue with the valves likely due to too much fluid? If so how do I drain it? I have no way of knowing what the fill level is on that system.

Is it possible that I need to bleed air out and if so, again, how is that done?

FWIW, I did buy the owners manual and like the other manual I bought I show different things my tractor has - again it's pretty useless.

This has been frustrating beyond description. Thanks for any guidance.

 

[Jim.ME]

l do not believe too much fluid is affecting how the levers move. It sounds to me like something is out of place in the spool centering area.

An Owner/Operators manual is mainly going to give info on how the machine needs to be maintained and what the controls do. The service manual goes into repair disassembly, inspection, and assembly. One has to remember the service manuals are written for dealer mechanics, not the DIY market.

 

[MKinON]

i all, I'm back with (surprise surprise) more issues. Sorry for the long silence, but have been struggling with a few things. But, I finally hired a guy to help with the power steering issues. Not the sharpest stick, but he did help and that seems to be working fine.

I replaced all of the seal in the backhoe valve body and many of the hoses that support the backhoe. My issues are now with a couple of the valves which were working properly before I added more fluid. My issues are with two of the valves, the two end ones (boom lift and left "outrigger").

The boom lift goes up as expected, but the valve does not want to travel the other way to lower the boom. If I really lean on it, it eventually bleeds itself down. If I work it back and forth, the valve starts to work normally, but as soon as I let it sit or work another valve it returns to not wanting to move. The outrigger valve has the same issue. FWIW, the valves are on the outside of the valve block where the fluid should be coming in and out.

Full disclosure, I'm sure I added too much fluid to the system - at one point fluid was shooting out of the air vent at the fill tube. I removed what I could with a siphon, but I'm sure there's still a gallon or so too much. So my questions:

Is my issue with the valves likely due to too much fluid? If so how do I drain it? I have no way of knowing what the fill level is on that system.

Is it possible that I need to bleed air out and if so, again, how is that done?

FWIW, I did buy the owners manual and like the other manual I bought I show different things my tractor has - again it's pretty useless.

This has been frustrating beyond description. Thanks for any guidance.

There is probably some debris stuck somewhere in the spool assembly causing it to bind or restricting the flow. If your oil tank was that full that it spewed out the top, it probably stirred up the tank and any gunk at the bottom very well.

 

[mrcaldwell]

So, a little update: I removed the two offending valves to investigate. Didn't note any chunks, gunk or bits, but did find that both of them had a broken o-ring. I have no idea why that would cause the behavior it did, but the two now seem to functioning properly after re-install. I am going to have to have 2 of the backhoe rams re-sealed (one leaks, the other sags) and am just going to have to live with the boom sweep not staying put. I have noticed that if I can get the tractor somewhat level, the swing isn't so bad.

 

[mrcaldwell]

So another irritating challenge: This (pictured- the hose with two clamps came off the pipe with "clean" end) power steering line keeps blowing out. 2 hose clamps, tightened with a ratchet, isn't enough to keep this line on. For the third time, my left foot and leg got coated with power steering fluid. I noticed this morning, that the front wheels are turned all the way to one side when I dismounted this time. I was wrestling with trying to keep it going where I wanted (on a bit of a side slope) when this happened today. It seems like there isn't something in the system to tell it to stop pushing fluid when the wheels are at their end of travel?

Incorrect diagnosis?

Normal behavior?

Something ELSE to find and fix/replace?

 

[Jim.ME]

So another irritating challenge: This (pictured- the hose with two clamps came off the pipe with "clean" end) power steering line keeps blowing out. 2 hose clamps, tightened with a ratchet, isn't enough to keep this line on. For the third time, my left foot and leg got coated with power steering fluid. I noticed this morning, that the front wheels are turned all the way to one side when I dismounted this time. I was wrestling with trying to keep it going where I wanted (on a bit of a side slope) when this happened today. It seems like there isn't something in the system to tell it to stop pushing fluid when the wheels are at their end of travel?

Incorrect diagnosis?

Normal behavior?

Something ELSE to find and fix/replace?

Incorrect hose I believe. that looks like a home-grown patch job. All the steering hoses should have crimped on ends from what I see in the parts books.

If you turn the steering wheel to the stop and hold it there it will hold pressure on the cylinders, the relief vale in the pump controls the pressure. not the cylinder position.

 

[mrcaldwell]

Incorrect hose I believe. that looks like a home-grown patch job. All the steering hoses should have crimped on ends from what I see in the parts books.

If you turn the steering wheel to the stop and hold it there it will hold pressure on the cylinders, the relief vale in the pump controls the pressure. not the cylinder position.

Thanks. Why am I not surprised?