Hi All,
In the second pic from the top in Kiwi's post
You can see the two different types of gears "mated" together in the lower pump
15 and 14 teeth
a recipe for mechanical marmalade
Recently I have been fettling a pump for my GS "special"
I am using NOS gears and a new cast iron body, and a phosphor bronze drive end plate
It has taken many hours to get it running anyway smoothly, and more to go
Singles will destroy the worm drives to the pumps if the pump is too tight
Personally I wont risk an old mazac pump on an A10 engine
I have seen oil leaking through the mazac (monkey dung) bodies
John