Eugen wrote: ↑Sat Apr 08, 2023 3:12 pm
It wasn't easy but the swing cylinder is out. What I find surprising about this backhoe is that the exterior shape of all parts is extremely bad, lots of pretty deep rust. Yet the clearest and cleanest red hydraulic oil came out of the hoses and cylinders. No sludge in the swing cylinder either. This is a bit of silver lining and gives me some hope that the pump is still ok.
EECBBA3B-753B-489F-84C0-016F3F2F303B.jpeg
It looks like you're really doing a great job with this!
It's a bit down the road for me yet, but I'll have to decide how aggressively to pursue overhauling my hoe. I can see that it needs new hoses. But if it looks fairly clean inside the hose ports, I'm tempted to just put new hoses on it, try to cycle it all through its paces using either compressed air or disposable oil, and just see how it runs.
But time will tell.
Bob
Definitely go the disposable oil route. If something binds a bit with air the pressure will rise, and when the bind lets go things could move very rapidly and possibly catastrophically with the stored energy of the compressed air
Eugen wrote: ↑Sat Apr 08, 2023 3:12 pm
It wasn't easy but the swing cylinder is out. What I find surprising about this backhoe is that the exterior shape of all parts is extremely bad, lots of pretty deep rust. Yet the clearest and cleanest red hydraulic oil came out of the hoses and cylinders. No sludge in the swing cylinder either. This is a bit of silver lining and gives me some hope that the pump is still ok.
EECBBA3B-753B-489F-84C0-016F3F2F303B.jpeg
It looks like you're really doing a great job with this!
It's a bit down the road for me yet, but I'll have to decide how aggressively to pursue overhauling my hoe. I can see that it needs new hoses. But if it looks fairly clean inside the hose ports, I'm tempted to just put new hoses on it, try to cycle it all through its paces using either compressed air or disposable oil, and just see how it runs.
But time will tell.
Bob
Definitely go the disposable oil route. If something binds a bit with air the pressure will rise, and when the bind lets go things could move very rapidly and possibly catastrophically with the stored energy of the compressed air
Gordy
That's a good point. I'll definitely go the oil route.
Bob
"Never be afraid to try something new. How hard can it be?"
Finished all the measurements and scouting of seals and o-rings on hercules, so the parts were ordered. The cost to refresh the boom, dipper, bucket cylinders which are identical, and the swing cylinder was about $80 CAD. Shipping was $30 CAD. Oh well. You notice the stabilizer cylinders are missing here. I'm stuck, not able to take them out until the backhoe frame is separated from the trencher body.
Those of you who have the Cessna cylinders you might find the list of parts useful.
Edit: ugh, sometimes the finger's too quick on the trigger. I'll call and cancel the order because there might be a way to get the stabilizer cylinders out without backhoe frame removal. Should at least give it a good try.
Last edited by Eugen on Wed Apr 12, 2023 3:36 pm, edited 1 time in total.
@Eugen The down rigger cylinders are removed through the top of the backhoe frame post.
There are 2 pins at the bottom of each down rigger. The lower of the 2 pins holds the rigger pad in place and must be removed and a pin at the top of the post which attaches the cylinder top.
This should let the extension tube slide out through the top of the frame, that is unless the top of the frame post are bent inward. Removal of the 2 hydraulic lines may also be an issue. Getting a wrench on the 2 lines is a tight fit.
Spike188 wrote: ↑Tue Apr 11, 2023 9:05 am
First paint 1rs.jpg
@Eugen The down rigger cylinders are removed through the top of the backhoe frame post. D100 down riggers.jpg
There are 2 pins at the bottom of each down rigger. The lower of the 2 pins holds the rigger pad in place and must be removed and a pin at the top of the post which attaches the cylinder top.IMG_20210621_180649384.jpgThis should let the extension tube slide out through the top of the frame, that is unless the top of the frame post are bent inward. Removal of the 2 hydraulic lines may also be an issue. Getting a wrench on the 2 lines is a tight fit.
@Spike188 that looks great!
That represents a lot of work to tear it down and clean it that completely. And the paint job looks well executed as well.
Bob
"Never be afraid to try something new. How hard can it be?"
I'm stuck, not able to take them out until the backhoe frame is separated from the trencher body. 
Should at least give it a good try. 
