Ok, as promised, the Oil Pump, this can be a lttle tricky but with care (and a couple of tricks) its not difficult
Immidiatly there was a problem
Then undo the nut on the top of the pump and remove the washer/plate and shims
Use a sheet of clean paper to keep the removed parts on, in the order you remove them
Next rotate the top piece (where the cable fits in) until the pin is free.
In this case there was a roll pin fitted, originally there was a small threaded pin fitted, either is ok
Remove the pin and pull the piece up gently and remove with the spring underneath
Your collection of bits should now look like this
I next remove the knackered union, just to make handling easier
Now you need some "special tools"
Loosen the 4 screws on the top of the pump, then put in the plastic bag
IN THE BAG, remove the 4 screws and GENTLY take the top off the pump.
The top piece will look like this
Take the central rod, its spring and washer out of the top, and put with your bits
Now take your elastic band and tie 2 knots in it
Now returning to the body of the pump, STILL IN THE PLASTIC BAG, gently pull the middle out BY THE CENTRAL SHAFT !!!
DO NOT PULL IT OUT BY THE COG WHEEL !!!
Not all pumps are the same inside, but all are very similar. In the pic below you will see two VERY small pins, inside the cog wheel, these are held in place by the cog wheel and the central shaft, they have a SPRING under them !!!
If you pull the copg wheel up by more than 2mm, the pins will fly out (ask Mancini
Your bits should now look like this
There is a wavey washer underneath the cog wheel, and also this one in the bottom
There are 3 seals to replace
Change the seals, clean up all the bits and gasket surfaces and you can start the rebuild
Until its safely back together
Next rebuild the pump top and fit a new gasket
Carefully push the thin shaft (in the cap) into the new seal in the centre of the main body
carefully push the two halves together, DO NOT TRAP THE NEW GASKET
and replace the 4 screws
Ok, now refit the tang of the big spring into the top of the body
Fit the other end of the spring into the hole in the top "cam" piece, and compress straight down, pushing the cam piece over the top of the pump
Rotate the cam piece anti clockwise until the small hole appears in the shaft and replace the pin
rebuild the top with its shims and washer and top nut
Then the jobs a goodun
All i need now is a new one of these
NSRNICK is looking for one for me, but in case he hasnt got one, please have a look in your sheds
Next i will fit yesterdays electics plate back on the engine, and if my new pump shaft bush arrives, fit the pump too.