Help with an S175

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And was that like that before you changed the seals?
If it drops that fast and you do not have a leak anywhere, then your seals are not correct installed.

I agree if you did the work and have the correct seals then this should not be happening. Did you do just the wiper seal or repack the rod end of the cylinder? If just the seals then you do have another issue. If you had the rod out of the cylinder and repacked that then You need to start over. Your rod is bypassing oil internally and that is why it drops now. Especially if it did not do it before. Hard to tell what you did and if there were mistakes made. Not sure this is what you want to hear but that's how I see it.

 

[cavedweller29]

And was that like that before you changed the seals?
If it drops that fast and you do not have a leak anywhere, then your seals are not correct installed.

Would both sides have to be bad to have drift like that or would it do it if one side was bad and one side was good?

I reinstalled the new ones in the same orientation as the old ones. I was a little concerned at the time because the piston seal seemed fairly loose after it was installed. I'm thinking I might have got mis sized seals or just typical chises junk....they were relatively cheap aftermarket . They weren't the cheapest but the were about 1/2 the cost of shipping bobcat branded seals.

 

[cavedweller29]

I agree if you did the work and have the correct seals then this should not be happening. Did you do just the wiper seal or repack the rod end of the cylinder? If just the seals then you do have another issue. If you had the rod out of the cylinder and repacked that then You need to start over. Your rod is bypassing oil internally and that is why it drops now. Especially if it did not do it before. Hard to tell what you did and if there were mistakes made. Not sure this is what you want to hear but that's how I see it.

I did do all the seals that are removable and they were installed in the same orientation as the originals. I truly can't say if it was dropping before because except for the first inch or so, it moves verrrrryyyyy slowly if at all once it catches. I only noticed the initial drop because I was paying attention after the install. I initially thought air and that it would go away after a little use but, I have about 3 hours on it after the install and it is still doing it.

I saw in the manual that you can test the seals by plugging the lower hydraulic hose to the cylinder, and then move the foot control down and look for seepage out of the lower cylinder port. The left side lower port is tough to get to, does anyone know if you can do it the opposite way, plugging the top hose and trying to lift the arms to see any seepage out of the top port?

 

[fortworth-cowboy]

Would both sides have to be bad to have drift like that or would it do it if one side was bad and one side was good?

I reinstalled the new ones in the same orientation as the old ones. I was a little concerned at the time because the piston seal seemed fairly loose after it was installed. I'm thinking I might have got mis sized seals or just typical chises junk....they were relatively cheap aftermarket . They weren't the cheapest but the were about 1/2 the cost of shipping bobcat branded seals.

Did you put grease on the seals before putting them back in the barrel? Could be that you scared a seal or rolled.

 

[fortworth-cowboy]

I did do all the seals that are removable and they were installed in the same orientation as the originals. I truly can't say if it was dropping before because except for the first inch or so, it moves verrrrryyyyy slowly if at all once it catches. I only noticed the initial drop because I was paying attention after the install. I initially thought air and that it would go away after a little use but, I have about 3 hours on it after the install and it is still doing it.

I saw in the manual that you can test the seals by plugging the lower hydraulic hose to the cylinder, and then move the foot control down and look for seepage out of the lower cylinder port. The left side lower port is tough to get to, does anyone know if you can do it the opposite way, plugging the top hose and trying to lift the arms to see any seepage out of the top port?

I would not do that, because it is not safe! The arms will crash down uncontrolled.

 

[cavedweller29]

I would not do that, because it is not safe! The arms will crash down uncontrolled.

I was thinking of doing it with the arm support on but I will take your advice. Thanks

 

[cavedweller29]

I would not do that, because it is not safe! The arms will crash down uncontrolled.

I was thinking of doing it with the arm support on but I will take your advice. Thanks

Yes, I did use grease. Will the arms still drop with one good cylinder and one bad cylinder?

 

[fortworth-cowboy]

Yes, I did use grease. Will the arms still drop with one good cylinder and one bad cylinder?

Yes and it is hard to determine which one is which

 

[cavedweller29]

Yes and it is hard to determine which one is which

Thanks, I will disconnect the lower hoses and do the seal test from the manual to prove / disprove a bad seal and, if there is a bad one, which one it is. I appreciate it.

 

[fortworth-cowboy]

Thanks, I will disconnect the lower hoses and do the seal test from the manual to prove / disprove a bad seal and, if there is a bad one, which one it is. I appreciate it.

IF you can, make yourself a hose (3/4 diameter) and rout it into a bucket. Less mess and you can measure better if both have the same.