HanSolo
Well-known member
- Joined
- Sep 11, 2012
- Messages
- 299
So I'm replacing the seals on my 709 backhoe attachment boom cylinder. Now I've done ram seals probably a dozen times and the o-ring I do last is the square one on the ram head that nests on top of the round o-ring. The rubber round o-ring is flexible and slides over the head no problem. But that orange square o-ring is made from a much less flexible material and does not stretch well at all. I've tried making the material more pliable by using a heat gun with good results but yesterday that o-ring stretched too much and wouldn't nest in the groove well. I tried putting the head with the loose o-ring in the freezer to contract but it still was loose. Carefully inserting into the bore, trying to fish the o-ring by the threads but the final push still burred the o-ring and I know it's not going to seal well. I've ordered another kit but what I really need to know... What trick do you guys use to get those particular square orange o-rings on the ram head?