lift valve rebuild

[rjg854 11,587]

Not sure where to put this, but I have a drip coming from the lift valve on the C-160.  I've ordered the parts I need from Lowell.  I've tried searching for the steps needed to rebuild the lift valve, but haven't had much luck with that.  With no experience with hydraulics,  if someone can list the steps I'd have to take in order to make this repair.  Do I have to take the valve off the tractor, or can I do this with it in place?  The drip comes from the front of the lift valve, from a silver cap that attaches with 2 screws.  I'm sure I'd have to pull the whole valve out to do it, but any help would be greatly appreciated.

Edited December 7, 2020 by rjg854
Picture added

[JoeM 7,874]

There is not much in those to go bad, just o-rings. I guess you could leave it on the machine, but I would take it off and work on the bench cleaning everything up good. Put a little oil on the o-rings when you reassemble. 

[Tractorhead 9,065]

Even it‘s easier to have a closer look inside the surfaces,

they should be clean and without any scratches inside.

 

Depending on status it can be reworked also mounted in place, but i would remove it for the closer inspection.

 

As @JoeM allready mentioned normally just simply change the O Rings and flush it, to drain loosen o- ring parts out,

to not have them in the Hydraulic system.

[gwest_ca-(File Mod) 11,146]

 

[pfrederi 18,021]

You have to remove a teeny tiny snap ring on the front end of the valve core. (That is a real treat as there is hardly any clearance and you need really tiny pins on your snap ring pliers). Then you can pull it out to the rear.  Put the new cups (they are not O rings) in hot water while you get the old ones off.  Make a note which groove they go in and which way the cups face. Lube the new rings up and work the on trying not to damage them.  Put the valve care back in keeping the spring compressed try to get the snap ring back on.  i think Lowell includes them. Note clean up your work space if that snap ring slips off it will go to join the detent balls from your tranny and other small objects.

 

Edit  I just realized the valve in question is a newer type.  I was describing the valve in Charger/Electros

Edited December 7, 2020 by pfrederi

[pfrederi 18,021]

3 hours ago, JoeM said:

There is not much in those to go bad, just o-rings. I guess you could leave it on the machine, but I would take it off and work on the bench cleaning everything up good. Put a little oil on the o-rings when you reassemble. 

The aren't O rings they are cups.

[JoeM 7,874]

1 hour ago, pfrederi said:

The aren't O rings they are cups.

Oh my bad! cups

Look like o rings to me but for the sake of what ever we'll just call them seals?

[JoeM 7,874]

This may help too.

https://www.toro.com/getpub/6926

 

[pfrederi 18,021]

1 hour ago, JoeM said:

Oh my bad! cups

Look like o rings to me but for the sake of what ever we'll just call them seals?

 

 

 

Sorry I thought he had the older control valve. 

 

 

Edited December 7, 2020 by pfrederi

[Tractorhead 9,065]

Seals can have different shape depending on manufacturer.

 

Here most hydraulic shop‘s have them normally in different sizes available or can them order shortly.

take the Seals as samples.

 

quickest way i would do it here.

[JohnD 145]

8 hours ago, JoeM said:

This may help too.

https://www.toro.com/getpub/6926

 

Thanks!  I've been looking for that.  I have a slow leak that I might just tackle now. 

[rjg854 11,587]

  for that manual, Red Square is the best 

[520HC 208]

I just rebuilt one last week. Take the cap off the front the handle off the rear and pull the shaft thru. There are only 2 orings one in back and 1 in front.

[rjg854 11,587]

Got some information from Lowell also seems to be a fairly straightforward repair, but keep the pointers coming. I have no experience with hydraulics. Thanks for everything so far.

[squonk 41,674]

6 hours ago, rjg854 said:

 I have no experience with hydraulics. 

Yes you do! Are you forgetting that hooby-dooby you installed in your house a few weeks ago?  

[rjg854 11,587]

Oh right, the hooby-dooby,  so that's all hydraulics are then.  I should be able to do this with no problem.

[953 nut 56,235]

1 hour ago, rjg854 said:

the hooby-dooby,  so that's all hydraulics are then.

No, there are also whatchamacallits and an occasional thingy.                                  

[rjg854 11,587]

Got my parts from Lowell yesterday, so it looks like today I'm going to try and tackle the valve.  I had to use the C-160 to plow after this last storm, it didn't leak to bad, so the sooner I get it fixed the better.

[rjg854 11,587]

Got the lift valve rebuilt and reinstalled on the C160. For somebody that claimed they didn't know anything about hydraulics, the rebuild was pretty simple. So anyone thinking that this is a difficult job, don't sweat it. 

[Charbs152 254]

16 hours ago, rjg854 said:

Got the lift valve rebuilt and reinstalled on the C160. For somebody that claimed they didn't know anything about hydraulics, the rebuild was pretty simple. So anyone thinking that this is a difficult job, don't sweat it. 

im doing the same with the lift cylinder...  piece of cake to rebuild