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12K views 5 replies 3 participants last post by  amesghali  
#1 ·
Hey Guys,

How difficult is it to replace the Injection Pump Seal?

I'm looking at my IP and it seems that the darn thing is snug in there. And it's pretty flush with the body. So how do I get it our to inset the new one?

thanks,
 
#2 ·
Okay, with a little searching on the web, I found my answer.





c/p

You can remove the seal with the shaft in place using a modified flat blade screwdriver. Select a large sturdy one you can afford to lose if you get the grinding wrong the first time, but it is not critical by any means. Round off all edges on a fine stone or wheel so that it does not tend to scratch or gouge.



Avoiding pressing hard against the pump shaft, gently jam it through the rubber part until the tip hits the inner wall of the seal under the metal rim, and pry up. If the seal metal rips on the first pry as mine did, just move to another spot and repeat. Mine popped out on the second pry. A screwdriver with a thicker tip would have likely worked better. Use a small piece of electrical tape to cover the keyway and protect the seal from nicks, and lightly grease the seal lips. Choose a deep socket nearly the same diameter as the seal metal rim (I think I used a 7/8") as a seal driver, and gently tap in the new seal. Watch very carefully at the beginning that the seal goes in level, because they just love to become tilted and jammed.

Hope this helps others with the leaking shaft seal problem.
 
#3 ·
okay, I replaced the IP shaft seal. The good news is that NO MORE LEAK! yes! I don't have to get a rebuilt IP for $400. The bad news is that it wasn't as easy as the article above.

I grounded down a screw driver and went to work, but that seal was not budging.

It's way below freezing in my neck of the woods. So I thought I should heat up the collar on the IP. That loosened the seal so it would move, but it still would not come out.

Next, I got pissed off and started to hack away. I pulled out all of the rubber. bent the seal to hell and finally pulled it out.

I left the collar of the pump a marred mess. So I got some emery paper and sanded away to smooth out the marring.

I lubed the new seal a bit and tapped it into place with a 3/4 socket.

Timed the IP and the Caddy is purring like a kitten... and no leaks from the shaft!



View attachment 8079




 
#4 ·
Yes sometimes trying to dig out a old seal is a puzzlement, and I too have had to "pound" on them a wee bit to break the outer steel. Glad it worked out for you. Thanks for the Pictures.
 
#6 ·
You can try it, but Prolly not.

A new seal most likely will not fix a leak due to a worn shaft. After many miles, the shafts wear out and leaks will occur. In a re-manufacture process the shafts are re-chromed and sanded down to the popper specs.