I just completed the rebuild of my raw water
pump (Sherwood F 85) on a Westerbeke
4-107. I would say this is a job you can do anywhere. Here is what I did and so far so good.
1. Remove pump and impeller.
2. Using a hammer and block of hardwood, tap out the old shaft with bearings (x2) and seal (x1); vise to press out would be great.
3. Clean body and cover of pump to prep for paint
and new gasket
4. Check shaft for any scoring/wear. My pump shaft was scored so rather than replace, I purchased a Speedi Sleeve to slide over the shaft after the 2 new bearings were pressed on.
5. Press/tap new bearings onto shaft using a short piece of pipe just larger than shaft so you are pressing on inner race
of bearings. Be sure the bearings are square to the shaft. If you can warm the bearings and freeze the shaft prior to assembly, the bearings may slide on easier.
6. I put a Speedi Sleeve on the shaft next, over the scored area where the seal sits; this is an extra step.
7. Cool the bearings and shaft then press/tap the entire assembly into the pump body.
8. Press seal onto shaft into pump making sure the open side of the seal is on the water/pressure side/impeller side. O-ring suggested in a previous post was a great idea I think and I did follow this suggestion.
9. Replace impeller, gasket
, cover and repaint.
Hope this helps.