Oberdorfer Seals Replacement
The trusty Oberdorfer Raw water pump seals can be replaced easily of they start to leak. Part number is 11691, available from http://www.pumpsandpartsonline.com ( Also Known as Cardinal Pumps)) for $ 50.00 ( 2016) No sales tax, ( $ 83.00 2023, free shipping)
The seals include upper and the lower seals plus the middle cylindrical seal, the "O" ring and impeller and snap ring.
To remove them I used a screw driver and a hammer to push them out. One has to be carful not to scratch the walls.
Inserting is easily done using a vice and socket wrench of 13/16 size. Use loctite No. 620 on the outside of the metal seals to keep them from leaking, then insert them.
After I installed them I found them slightly leaking after about 100 hours of use.
I removed the impeller and the shaft. I cleaned both the shaft and the surfaces of the seals with paper towel.
I applied a small amount of Lano_Cote both to the seals and the surface of the shaft and inserted back into the housing.
I found that this stops the leak completely.
Pumps and Parts Online
431 Brown Road
St. Peters, MO 63376
View the complete Album HERE
Since my last posting above - I found that I could use steering wheel puller to remove and insert all 3 seals with much control
View these Album Images to see how.
Watch the manufacturer video. I do not agree with the hammering part, since it may cause injuries to your hand.
UPDATE - 03-2023 - The Youtube video link was removed as Youtube had removed the video.