B26 Hydraulic Cylinder Repair

[70runner]

The dipper cylinder on my BT820 backhoe is leaking from the rod, so I'm about to tackle a re-seal job. Rod itself looks ok. Plan to buy the seal kit from Kubota. Have read a lot of good advice here on this forum, but have two questions.

How would I safely position the backhoe to remove this cylinder?

All the other cylinders on the B26 have typical gland nut wrench circular holes, but this cylinder has the holes at the edge of the housing (pix). Will a hook or pin spanner wrench work? Or I guess I could pipe wrench it.

 

[Edke6bnl]

I made a harden pin wrench to remove the ones on my b7800 bucket, worked great but came off real easy. They seal with an oring and don't need to be extremely tight when installed

 

[TheOldHokie]

The dipper cylinder on my BT820 backhoe is leaking from the rod, so I'm about to tackle a re-seal job. Rod itself looks ok. Plan to buy the seal kit from Kubota. Have read a lot of good advice here on this forum, but have two questions.

How would I safely position the backhoe to remove this cylinder?

All the other cylinders on the B26 have typical gland nut wrench circular holes, but this cylinder has the holes at the edge of the housing (pix). Will a hook or pin spanner wrench work? Or I guess I could pipe wrench it.

View attachment 100049 View attachment 100050

Hook wrench of the appropriate range.

Dan

 

[BAP]

Start loosening the nut before you take the cylinder off the backhoe. It will be easier doing it in place because the cylinder can’t move around. Once you get it loosened a little bit, then take it off. Otherwise, you have to come up with a way to hold the cylinder from turning as you try to loosen the nut. Do the same with the final tightening. Also, look at the outside of the barrel of the cylinder where the nut goes into to make sure that there isn’t a set screw locking the nut into place. Some cylinders use them.

 

[#40Fan]

To remove safely, you should be able to chock the wheels, extend the hoe to an "L" shape, curl the bucket and set it on the ground. As long as the tractor doesn't move, the arm shouldn't go anywhere after the cylinder is removed.

 

[70runner]

Thx all! Re-seal kit enroute from Messicks. Neighbor has a vintage Armstrong pin spanner wrench that should work.