Case/Davis trencher backhoe

[MattA]

Another option would be to use a pair of vice grips or pliers to hold the steel rod your pounding on. I've done it but on a much smaller scale than what your doing.

[Eugen]

The thumb pain is less annoying so I thought I relax a little trying to disassemble the cylinders. I was stomped a little by this inner locking ring that holds the gland in place. As is there was absolutely no way to get to it.

With help from @Spike188 I figured the gland has to be pushed in far enough. Didn't go in easy, I used a copper hammer to whack the gland all around 'til it went in far enough to reach that ring. Tough ring too.

The rod came out then.

[JSinMO]

@Eugen Glad to hear your thumb is a little better, and your able to make some progress.
I’m enjoying the work you @Spike188 and @thebuildist are doing on your backhoes.
It’s making me want to bring mine back into the shop for a little sprucing up too! Hopefully I can work it into the rotation later this year.

[DavidBarkey]

Anouther way to draw in that type of gland for removing the ring . Is to fill the top end with gear oil or the heaviest weight oil you have . Burp ALL air out and seal with appropriate cap . You only need a couple of inches of oil between the piston and gland . Stand upright and put more oil or grease on shaft and around gland to air seal . Cylinders small enough to pick up by hand , pick up and bang the bottom on an piece of hardwood . The enercia of the rod assembly when hitting the floor will draw the glad with it as the fluid creates a vacuum between the piston and gland. The larger ones use a hd ratchet strap looped around it and or a BFH and block of wood . Sorry guys about being late to the party , I don't always think of these things untill after people are done fighting with stuff .

[Eugen]

Thanks Dave! It's a good procedure to remember for next time.

[thebuildist]

Or, if you're built like I am, you just put your thumb on the gland and "push on 'er pretty good."

[Eugen]

yep, nope

Wish I had a press of sorts for this task

[Eugen]

Cylinder 2 and 3 done taken apart, 2 was a bear, done over three days bit at a time, 3 was easy, done in about an hour.

Next I need to get the pistons and glands off, and start measurements to figure out which seals and o-rings to get.

After that tackle the swing cylinder(s).

[JSinMO]

@Eugen I have no doubt your still hurting, way to power through it!
Great job getting it apart. Looks like you’ll be reassembling pretty quick.

[Eugen]

Doesn't hurt much anymore Jeff.


After the kids were asleep I managed to get the pistons off of two rods. The nut holding the piston takes a 1-11/16 socket, which I don't have. Luckily, after heating it up, it came undone real easy with the 30" pipe wrench.

Piston, gland, seals, and o-rings ready to go inside and get measured. But not tonight. Time for