[Healeys] SU Pumps Bad Rap (was No Power)

[John Harper]

Rich

You might be interested to hear that Burlen have provided revised 
settings in line with what you have found. As you say the original 
setting did not allow reliable throw over.

I produced a test rig some time ago; similar to those on the workshop 
manual where I pumped paraffin of kerosene as you might call it. I had a 
pump that let me down after a long run and then got better after a rest. 
I traced this using the rig to the body of the pump heating up, after 
many hours running, where the throw over mechanism just stopped working. 
I then revised my set up procedure as you have but it was some years 
later that a colleague brought the Burlen note to my attention.

Regards

>
>What I have been observing is that on new pumps, they are often not set 
>correctly from the factory and often seem to need that extra bit of 
>length for proper throw over. Once this was done, these new pumps 
>worked fine.
>
>Rich
>
-- 
John Harper