I Am wondering if anyone knows if there is a non return valve on the original Hydro pumps? Anyone got a parts diagram for the pump. I am trying to ascertain why mine is really hard to pump with....

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Not sure Ive only used one myself twice (i dont have one of my own yet), but it would make sense if there were non return valves - one on the feed line and one on the evacuation line - the same rating as the rear line valves.

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YDO005 1965 stock standard MORRIS MINI DELUXE

I fitted one when I made my hydro pump.




It works well - I haven't tried it without it though. It's the red thing.


I have a separate vacuum pump which runs off my air drill.

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67 Deluxe - Red and white
69 Deluxe - Sugercane Grey

I dont use one on my homemade hydro pump. The schrader valve acts as a non return valve.
But when using the low-loss chuck like on the original pump there would have to be some sort of non return valve otherwise it will never pump up.

As i thought. No matter problem is being solved by a replacement

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