Willy Eckerslyke wrote in message
...

I'll try the mankiest looking water pump first. So what's the procedure
for dismantling - support the pulley and push the shaft through, then
support the body and push the shaft + impeller through?

I don't know the Vitesse water pump, but I have got the workshop manual for
the 2000. If the construction is similar, it proposes the following
dismantling sequence:

1. Undo the nuts and spring washers to remove the bearing housing from the
pump body.
2. Undo the nut, remove washer, and take pulley off the shaft.
3. Remove the impeller from the shaft (Being a workshop manual it quotes
Churchill Tool S.441 but looking at the picture, the tool supports the back
of the impeller with a flat plate and a threaded puller pushes the shaft
through the impeller, while pulling on the plate. The plate looks
substantial - probably to stop it bending and damaging the impeller).
4. Remove the circlip (pulley end) from the housing bore and withdraw the
shaft complete with bearings (It withdraws from the pulley end - push on
the impeller end of the shaft).
5. Remove the bearings, spacer etc from shaft.
6. Remove the sealing gland from the back of the impeller. That gland
normally bears on a gland face on the bearing housing. Check that for score
marks (likely if pump has been leaking) and re-face if necessary (Churchill
Tool S.126 which has a pilot shaft and a cutter. You might be able to
improvise something along valve grinding lines.)

When reassembling, assemble the bearings etc on the shaft, then press into
position: press on the ball race outer with a suitable tube, not the
spindle - you don't want the spindle to move relative to the bearings. Fix
in place by replacing the circlip in the housing groove.
When pressing on the impeller, don't forget to put the sealing gland into
the back of the impeller before you fit it. The impeller is correctly
positioned on the shaft when the gap between the back of the impeller and
the housing is 30 thou (0.76mm if you use metric). Solder the impeller/shaft
join to eliminate the possibility of water leakage along the shaft and under
the impeller.

Good luck!. Though in view of accurate positioning etc, I am not sure a fly
press is a good idea.

Jim