Hello, Bought this water pump rebuilt kit for my 3gm30f yanmar a year back and just recently started the rebuilt project. I don't have instructions or diagrams in the box it came in, but it looked pretty straight forward. Everything came apart easily even the bearings and also putting it all back together with the new parts looks easy. The only problem I'm having is putting the new seal in it's housing. The hole it goes into is about 2/3 the diameter of the seal, with a lip in front and back of the hole!... The seal itself is very rigid and to hard to compress,distort or bend (all above not a good ideal for the seal itself} to force it in it's home. The bad seal and leak is why this project had to be done... Any sugestions will be appreciated. If not the pro shop it goes! Thanks!...