520 Lift Cylinder Leaking

[WHX?? 53,284]

On one of my single purpose snow machines. Been leaking for quite awhile & I have a kit to fix it. Not sure if I want to lay the tractor up to fix it or not. I fear if oil can come out dirt & crap can get in. 

 

Is it a job to get it out and rebuild? Got a cab on it and the left side would have to come off along with the floorboards and covers. Is it a a pain to get the hoses off or can a guy do it in place? If not do the hoses have to come off at the valve or the cylinder?   

Trying to get some info before I tie into it. 

Cab discomboobled for oil change. 

Sure does make a mess on the under carriage. 

 

 

[JoeM 9,302]

I did one on the machine by taking out the pin and lowering it down, but the floor board and side panel was off.

Taking off the clevis on the rod end can be a little of a challenge.  

Probably not dirt getting in since it is pressurized. Unless it is running out, lever b till spring. could wrap it in an pig mat until you get to it??

 

the hoses are o-ring and come out easy, 

[WHX?? 53,284]

1 minute ago, JoeM said:

ever b till spring.

If I lever b till spring I'm gonna procrastinate and put it away and do nothing ... 

[WHX?? 53,284]

4 minutes ago, JoeM said:

clevis on the rod end

Guessing the clevis is screwed on the rod end? 

I have a extra cylinder from a parts machine guess I should play with it first maybe. 

[squonk 44,859]

Better get to it before someone calls you a "Sally!" 

 

Grab a roll of these and throw them under the leak. They are cheap. Fix it when it gets above 40°! 

 

[pfrederi 19,238]

That oily grunge works exceeding well to control rust and corrosion.  Several of my machines have that protection.  Almost none of my equipment will ever rust out from the bottom up

[lynnmor 8,232]

Does your cylinder kit include o-rings for the hose ends?  You might be getting a nice oil bath from there.

[Ed Kennell 43,757]

58 minutes ago, pfrederi said:

That oily grunge works exceeding well to control rust and corrosion.  Several of my machines have that protection.  Almost none of my equipment will ever rust out from the bottom up

                                 The Greasy Pete patina protectant,    And those spots on the floor are constant reminders to check the oil levels.

[Horsin'round 351]

1 hour ago, lynnmor said:

Does your cylinder kit include o-rings for the hose ends? 

 

Does anyone have a size/ source for these o-rings? Could use a couple of sets. 

 

Thanks 

[lynnmor 8,232]

8 minutes ago, Horsin'round said:

 

Does anyone have a size/ source for these o-rings? Could use a couple of sets. 

 

Thanks 

You have #5 ORB fittings.  Read up on ORB here.

[ri702bill 10,557]

3 hours ago, WHX?? said:

dirt & crap can get in. 

Probably not. The oil is under pressure and is getting by the rod seal, only thing outside is atmospheric pressure. And it is a horizontal application...

"Cleanup in Aisle 5" !!

[pfrederi 19,238]

30 minutes ago, lynnmor said:

You have #5 ORB fittings.  Read up on ORB here.

  Older hydros...Charger electros used ORB #5  later ones they switched to ORB #6..  #5 are 1/2NF thread   #6 9/16NF

 

O rings ore Dash# 905  and 906

[pfrederi 19,238]

1 hour ago, Horsin'round said:

 

Does anyone have a size/ source for these o-rings? Could use a couple of sets. 

 

Thanks 

PM your address can mail you a couple you  need #5 or #6 ??

[Handy Don 15,130]

4 hours ago, WHX?? said:

Guessing the clevis is screwed on the rod end? 

I have a extra cylinder from a parts machine guess I should play with it first maybe. 

Some are screwed on and some are welded.

First, though, get a good look at the rod end exit of the cylinder and be sure the end cap is held in with a spring clip. More than a few cylinders are welded together and we’d hear the “Navy" blue language all the way here on the east coast if you got into it before discovering that. 

I also vote for let ‘er be but set yourself some real penalty for not having it done before the Big Show!

Edited 19 hours ago by Handy Don

[WHX?? 53,284]

4 hours ago, squonk said:

Fix it when it gets above 40°! 

No excuse... - 5 today... 75 in the shop wood stove going. 

 

4 hours ago, pfrederi said:

oily grunge works exceeding well to control rust and corrosion

Agreed 

 

3 hours ago, Ed Kennell said:

spots on the floor

Seal coat for the gravel floor in the big shed 

 

4 hours ago, lynnmor said:

Does your cylinder kit include o-rings for the hose ends?  You might be getting a nice oil bath from there.

 You tell me I think I got the kit from you. Got a couple one for the shelf. 

[WHX?? 53,284]

I did tear into it but might have leaking control valve as well... more after the Packer game. 

[Handy Don 15,130]

4 minutes ago, WHX?? said:

more after the Packer game. 

First things first, for sure!

[Horsin'round 351]

4 hours ago, pfrederi said:

4 hours ago, lynnmor said:

You have #5 ORB fittings.  Read up on ORB here.

  Older hydros...Charger electros used ORB #5  later ones they switched to ORB #6..  #5 are 1/2NF thread   #6 9/16NF

 

O rings ore Dash# 905  and 906

 

 

Which are correct for '75 and '76 c-160s, sundstrand translations. 

[pfrederi 19,238]

3 minutes ago, Horsin'round said:

 

 

Which are correct for '75 and '76 c-160s, sundstrand translations. 

 Given that some one may have replaced a cylinder   I can't be sure ...I would guess #5 but you really need to check the thread count.

[Horsin'round 351]

The 75 has a welded cylinder,  probably lost the washer when Lowell rebuilt it last summer.  No plans to count threads until spring.  I appreciate your efforts. 

[lynnmor 8,232]

3 hours ago, WHX?? said:

 You tell me I think I got the kit from you. Got a couple one for the shelf. 

 

 

They are included, see "fitting o-rings"

 

I didn't see our transaction after a very brief search.  You should be good to go.

[WHX?? 53,284]

Not going to rebuild at this time. Seems the control valve is leaking quite abit so not even sure if the cylinder is. Maybe just running down on it. Maybe even a hose leaking. 

Going to clean it up as best can, leave the covers off and see if i can spot exactly where it is. Keep an eye on the oil level. I have a spare valve so maybe look that over and use it. 

[JoeM 9,302]

If your valve spool is leaking, the lift valve has two o-rings on the spool. 5/8 od x 3/32 thick.

You have to remove the internal snap ring opposite the lever and the spool pulls out that direction. It is easier to hold the valve on to get more room to get on the snap ring. 

I fixed a leak-r last week. l was able to remove the spool with the valve on the machine. But it did not have the onan engine it has a replacement kohler mag. Some of those valves are a devil to get off. 

Edited 4 hours ago by JoeM

[lynnmor 8,232]

Looks like hoses or their o-rings.  If you need to drop the valve, remove the battery and it’s tray, then you will see two holes that a skinny 7/16 socket can be lowered to the two bolts, hold the other end with an end wrench.

[Brockport Bill 2,121]

are you asking about a leak of the lower cylinder by the foot rest --- or the main valve unit inside the hoodstand? The lower cylinder is relatively easy to remove and install new O rings in it -- however the main valve unit inside the hoodstand on my C175 was brutal to remove ( i did new O rings and new hoses )