Hydraulic Cylinder Repair

pcrh

Member
Hi:

The loader cylinder is leaking and I would like to take it apart to fix. The problem is that it is resisting coming apart. From what I can see there is an end cap and then a clip under the cap and then the unit should separate. The cap does not seem to be threaded as I cannot see/feel threads. The clip under the cap is broken and I was able to remove two sections of it but the rest is under the cap and I cannot figure a way rotate to get more pieces out.

Any suggestion on a tool to use to get the cap off?

Attached is a picture of the cylinder end.

xmvphoto92762.jpg.pagespeed.ic.ZK9Rr1eD-B.webp


Thanks for your thoughts.
 
Looks like there is an internal snap ring shown in the housing below the cylinder rod that has to come out somehow or at least be depressed.
 
can you drill a new hole in the snap ring to get your snap ring pliers in there and depress the ring? the cap should slide out once the snap ring is compressed to a small enough diameter.
 

From the funny angle the end of the snap ring is sticking out at I would say it is being pushed out by the part it is holding in. You may have to tap that part in jsut a
little to release the snap ring.
 
With the ends broke off it's not going to be easy, but the snap ring will
have to come out.

Do hammer the end cap in to relieve the tension on the snap ring. Remove the
broken pieces. Then devise some way to turn the end cap to reveal more of the
ring, pry it out by any means you can, it will all have to come out.

Looks like the ring groove is braded out, that will have to be ground out
flush before the end cap will come past it.

Once all the snap ring is gone and accounted for (to be sure it is all out),
and the ID of the cylinder is cleaned up, the end can be hammered out by
pulling the rod so the piston hammers the back side of the end cap.

It's not going to be easy. I would look the rod over closely to be sure the
cylinder is even rebuildable. You don't want to do all that work for
nothing!
 

Hi:

Thanks for all the suggestions.

If I understand correctly, I need to work the snap ring out from under the cap and then use the ram to push the cap off.

The snap ring is in at least 3 parts. The ones visible are the 2 I pulled out. Just below the one on the right is tab of what is left. Hopefully the rest is in one piece.

Thanks
 

I was in a similar predicament with the rams on a Ferguson 735 loader . To remove the snap ring I had to carefully drill two 1/8th holes in the rim to allow a probe into groove from the outside . A lot of patience , time and side to side manipulation later saw them out .
 

Hi:

The cap refuses to move. Even when a BFH is applied ( see the notches on the end of the cap) and what is left of the snap ring is only about 1/8th inch. I can pry it away from the housing but there is not much to drill into. Also, thinking about the slot in the cap and this looks not original. Like the PO used a chisel to make the slot.

As I think this thru I have a second question. The end of the rod (where the mounting pin goes thru) would not allow for the cap or seals to come off or go back on. So unless the inner end can be unattached I would not be able to get the seals or cap off. Any thoughts as to what the inner end is fastened to?

The rod is rust free. What you see on the end is caked on dirt which did not come off on power wash.
 
Try pushing the cylinder in a bit.
Remove the wire ring from around the shaft and cap (seal)
Remove the cap.
Remove the snap ring.
Thread it out if threaded or use slide hammer type action to pop the piston out. May need to use both.

Edited to add...... May be a small allen head set screw that needs to be removed.. And small bent screw drivers help.

This post was edited by Mule Meat on 06/05/2022 at 09:17 am.
 
If the external end of the rod was manufactured with a cross tube, or other connection that is larger than the rod, the piston inside will have a nut holding it onto the rod. The piston is un-nutted from the rod, and all your seals etc slide on from that end. steve
 
mvphoto92867.jpg


I found a photograph of the ram I repaired . It had me tossed for days trying to decide which way to remove the round snap ring ; no holes or tabs for pliers .
Drilling was the only way in the end .
 

Hi:

Ok, once I get this apart the other end is the assembly point.

I took a close look at the housing. I cannot see any set screws to hold that end cap. Nor can I see any mark to indicate the housing is a two piece unit. I look at the other cylinder (same arrangement) so that slot must be factory. Knowing that the other end is how the ram is the assembly point is helpful.

Since the snap ring is under the end cap I am thinking the end cap is friction fit in the housing. So now I am going to try to push the inner seals inward to see if I get some separation from the end cap.

Thanks for the help.
 

Hi:

Ok, got a nice flat bar and applied pressure to the inner seals inward it went, as did the snap ring and the end cap. They all went down as a unit. Now I will try the opposite direction to see if it comes out as a unit.
 

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