Was going out for a short ride with the wife yesterday and went to add a few psi to the rear shock. Noticed that the H-D Shock Pump had come unscrewed at the bottom (normally hidden by the handle). Tightened it back up and the pump no longer pumped air -- no resistance whatsoever.

When I pulled the pump apart to see what might be wrong, I noticed that one of the two small O rings was split. OK, easy fix, right?

The problem is that I don't have a clue where the second O ring is supposed to go.

Would someone be willing to do the very easy disassembly of their H-D shock pump and tell me where the two O rings are supposed to be located?

I've added a picture that shows the shock pump disassembled. I have a small screwdriver pointing to the end of the pump shaft where one of the two O rings was located.

Thanks for any assistance you might provide!

 

Mine is outside in the sub-zero garage. Will monitor the post and if you dont get any replies will go out and get it tomorrow.

 

Just took mine apart to look for you.
The second 0-ring goes on the shaft at the end of the cone shaped tip.
Just to the right of your screwdriver in your picture.

 

RollaMo, when you reassembled the pump, did it work in that configuration?

Mine's still not working.

EDIT: Let me rephrase the question this way: Is that second O ring movable? Mine are loose enough to move up and down that shaft.

 

Yes, it still works just fine.

 

OK, the replacement O ring that I bought to replace the damaged one is just a bit too large.

It's back to the hardware store tomorrow to pick up a few that are the right size and we'll try again.

 

Yes, that second 0-ring is free to slide on the shaft. It's a fairly tight fit though, not lose.

Also, there is some type of oil on both o-rings.
When re-assembling tubes with 0-rings (think fuel transfer tubes on Holly carburetors), I used to put a dab of 3-N-1 type oil on the o-ring.
Then make sure the 0-ring slides into the tube without twisting. It has to make a good seal with the tube wall.

You'll know its making a good seal when you insert the rod into the tube, as you will feel slight resistance sliding it in.
Yeah, that sounds bad.... LOL

 

"Think fuel transfer tubes tubes on Holley carburetors"
Wow.
As a record holding NHRA Super Stock racer (And Competition Eliminator record holder) I'm loving this. Be it Scotty McClendon, or Bill Book, the majority of the notable carb. builders will tell you to use petroleum jelly on Holley transfer tubes. Won't erode the rubber O-rings, and seals great.

Now if they're made of Viton, it's another story altogether...

 

50 bucks and a new one is yours.
Throw it away.

 

I'm a bit more frugal than that. 25 cent O ring vs. $50 for a new pump. No contest -- try the O ring first.