4610 3 point help

Skoal022

Member
3 point drops pretty quickly after shutting the tractor down. Could it just be the piston seals? Got it pretty much apart now besides the hydraulic piston out of the cylinder.
 

Here is some pics
mvphoto52876.jpg


mvphoto52877.jpg


mvphoto52878.jpg
 
(quoted from post at 16:10:14 04/16/20)
That would be my first thought

How would you remove the piston from the cylinder if it had good seals? Compressed air in one of those 6 cylinder holes?
 

It's been 20 year since I rebuilt my but thinking I remover the check valve from the back of the cylinder bore and pushed it out or blew it out, this was with the cylinder still mounter to the top.
How did you get yours out?
 

I removed the lift cover with the cylinder attached. The piston would almost fall all the way back as far as the rod would let it, where the seal was pretty much gone as you can see. To remove the piston I had to unbolt the cylinder from the lift cover 4- 5/8 bolts in the center. Then I unhooked the armature and separated the two. Turned the cylinder up and piston pretty much fell out. No scarring and looked good inside.

The problem I'm having is a NH dealership sold me a 4000 oring which fit and told me it would be fine. And they didn't have a new backup ring for that oring. The backup ring looked to be ok so I stuck it back together. The spacing /gap didn't look to bad on the backup ring. But the old one did blow out at that gap. So I decided to by a new one and go ahead and replace that old one. And according to the parts diagram that oring for a 4000 is a lil different size than a 4610 if i read so correctly? I spent 100 dollars on all new seals for the lift cover and remote covers. So I don't wanna take the chance. I went ahead an ordered the correct part numbers oring and backup ring.

Now I need to remove that piston with a new seal. I don't wanna damage anything in doing so. I'm not sure where to blow the compressed air? There are 6 holes/seals on the cylinder that seal to the lift cover.
mvphoto52904.jpg
 
(quoted from post at 13:36:04 04/17/20)
I removed the lift cover with the cylinder attached. The piston would almost fall all the way back as far as the rod would let it, where the seal was pretty much gone as you can see. To remove the piston I had to unbolt the cylinder from the lift cover 4- 5/8 bolts in the center. Then I unhooked the armature and separated the two. Turned the cylinder up and piston pretty much fell out. No scarring and looked good inside.

The problem I'm having is a NH dealership sold me a 4000 oring which fit and told me it would be fine. And they didn't have a new backup ring for that oring. The backup ring looked to be ok so I stuck it back together. The spacing /gap didn't look to bad on the backup ring. But the old one did blow out at that gap. So I decided to by a new one and go ahead and replace that old one. And according to the parts diagram that oring for a 4000 is a lil different size than a 4610 if i read so correctly? I spent 100 dollars on all new seals for the lift cover and remote covers. So I don't wanna take the chance. I went ahead an ordered the correct part numbers oring and backup ring.

Now I need to remove that piston with a new seal. I don't wanna damage anything in doing so. I'm not sure where to blow the compressed air? There are 6 holes/seals on the cylinder that seal to the lift cover.
mvphoto52904.jpg
our air pressure is going to be so small compared to working hyd pressure, I don't see it harming anything where ever you apply it.. This looks much like , but not exactly, the hundred series, so I expect the hole you are after is the only one not it the row with the other 5.
 
(quoted from post at 11:24:41 04/17/20)
(quoted from post at 13:36:04 04/17/20)
I removed the lift cover with the cylinder attached. The piston would almost fall all the way back as far as the rod would let it, where the seal was pretty much gone as you can see. To remove the piston I had to unbolt the cylinder from the lift cover 4- 5/8 bolts in the center. Then I unhooked the armature and separated the two. Turned the cylinder up and piston pretty much fell out. No scarring and looked good inside.

The problem I'm having is a NH dealership sold me a 4000 oring which fit and told me it would be fine. And they didn't have a new backup ring for that oring. The backup ring looked to be ok so I stuck it back together. The spacing /gap didn't look to bad on the backup ring. But the old one did blow out at that gap. So I decided to by a new one and go ahead and replace that old one. And according to the parts diagram that oring for a 4000 is a lil different size than a 4610 if i read so correctly? I spent 100 dollars on all new seals for the lift cover and remote covers. So I don't wanna take the chance. I went ahead an ordered the correct part numbers oring and backup ring.

Now I need to remove that piston with a new seal. I don't wanna damage anything in doing so. I'm not sure where to blow the compressed air? There are 6 holes/seals on the cylinder that seal to the lift cover.
mvphoto52904.jpg
our air pressure is going to be so small compared to working hyd pressure, I don't see it harming anything where ever you apply it.. This looks much like , but not exactly, the hundred series, so I expect the hole you are after is the only one not it the row with the other 5.

Thank you that all makes a lot sense. That back up ring has a slot/ break in it. And it also tapered, I'm not sure if someone has ever replaced these before. My question is which direction the taper of the backup ring goes? It makes a "V" shaped when pressed together with the oring above it. Is that the correct orientation for the backup ring? Cause it can be flipped 180 where it would be an upside down "V".
 
mvphoto52909.jpg


https://forums.yesterdaystractors.com/photos/mvphoto52910.jpg[/img

You can see that tapering on the old backup ring.]
 

Take the check valve out of the end to the cylinder and see if you can push the piston out with a small rod, not sure if that opens up a thru hole into the cylinder or not, if you use air to blow in out be prepared, once the piston starts moving it'll pop out pretty fast with decent force.
 
(quoted from post at 14:05:00 04/21/20)
(reply to post at 11:43:16 04/17/20)
ttps://forumphotos.yesterdaystractors.com/photos/mvphoto53245.jpg[/img]
guide for hyd linkage, draft I believe. Please post picture of part that it engages with.
 


I posted a link to video of it operating. It treaded in on the back part of the lift cover close to the rock shafts. Right in the center. It wasn't part of the cylinder so I never removed that part from the lift cover.

mvphoto53249.jpg


mvphoto53250.jpg
 

We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today.

Back
Top