Author Topic: C11, 12 oil pumps  (Read 94 times)

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Offline parkes

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C11, 12 oil pumps
« on: March 10, 2019, 10:35:35 pm »
I have read stuff including opinions on this forum regarding refurb of the oil pump. Firstly the pump is very effective and not rubbish as suggested, originally made to a high degree of accuracy and  is well capable of delivering very high pressure indeed. It's the same pump as fitted to the Gold star engine.
If you do feel the need to attempt a refurb, do not remove material from the body faces with "a bit of a rub on abrasive paper" and be warned, they don't correctly assemble easily.
How do I know? I both machined them and tested them throughout the sixties. Incidentally, various tests were applied to every pump, supply flow rate, return flow rate and supply pressure, restricting the supply would generated huge pressure such that the worm drive on the test rig would literally burn out in seconds.

Offline donkey

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Re: C11, 12 oil pumps
« Reply #1 on: March 11, 2019, 03:16:04 am »
 :) I like, more please
Brown or Amber

Offline timsdad

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Re: C11, 12 oil pumps
« Reply #2 on: March 11, 2019, 07:22:12 am »
They could do with you at Draganfly's, Mr p, - I had to sort through their box full before I found a re-built one I was happy with!

Just a motorcyclist.