Rebuilding Hyd. cylinders

[ScottP]

I was asked to rebuild the cylinders off a Kubota front end loader model BF300.
The first cylinder came apart with no problems, cleaned and repacked in under an hour.
Now I can't get the cir-clip out of the last three. They are rusted in place.
I have had them soaking with penetrating fluid for a week. They are rusted to the tube. These cylinders are pretty small 2 1/8" OD with a 1" rod, so it's hard to get any thing in there to get at the clip.
I have tried heating the clip, which heats up everything, so I heated the outside of the tube in hopes of breaking the rust. I have tried tapping on the tube with a gasket hammer to break the rust. After heating I sprayed with silicone spray hoping it would cool the clip enough to break the rust. I tried all three together and its still rusted in place.
I tried driving the cylinder head in to loosen it up, however it is bottomed out.

Any ideas?

Scott

 

[c.perkins]

I have had good luck with using Deep Creep penitrating oil. It works real good if you heat the part and than spary it. I have used many times on alum. parts with steel hardware with good luck

 

[ScottP]

After posting I went back out to the shop and was thinking I need to get behind the cir-clip with out breaking any tools.
Then it came to me. Drill a small hole through the tube just behind the end of the clip and use a small punch to tap out the clip.

Worked like a champ! Two more to go.

Scott

 

[Gun guru]

How do the cylinder rods look, are they scored up at all?

 

[Gun guru]

How do the cylinder rods look, are they scored up at all?

 

[ScottP]

Rods are good, no rust. The seals were just hard and cracked from age.
I honed the tubes where the head seats and they cleaned right up.
The cir-clips on the last three cylinders were not the same material as the first cylinder.
The first cylinder was a different style than the others. It had a one piece head and the others had a two piece head. Somebody must have replaced the one cylinder at some point.
Scott

 

[Dave_from_Texas]

Where did you find the seal kits? I priced them for mine and I could buy new cylinders cheaper that the kits. 4 cylinders were going to cost me $500.