JD 300 Backhoe swing cylinder repair

[RCBS]

Have located the seal kit. This is 100% brand new for me as I have never had a cylinder apart. Removal from the machine is not a good option, so need to repack it in place. Been leaking for two years and can no longer be ignored as the leak has gotten worse.

Open to any tips/tricks/advice if you have some.

I can't locate a dummy guide. This is the best I have found so far but is a different design of cylinder end.

 

[1Snowcat]

 

[1Snowcat]

Looks like a real stout air chisel was used in the video above if the end cap has notches similar to the one in the second video. I think the tear down is toughest part.. along with keeping it super clean upon re-assembly.