Hi Everyone, I'm a new member on the forum and I am interested in restoring vintage pumps. I currently have three kismets, three Britich Goodridge and a number of Sutty, Aerite, Dunlop and Desmo pumps.
I've been trying for some time to get hold of some original or replica braided rubber hose and good quality attachments for both ends. Also leather washers to restore the inner pistons where necessary.
Posted: Tue Sep 16, 2008 3:29 pm Post subject: Making Leather washers
A chap from Australia has just sent me instructins about making leather washers for repairing pumps. Hope he's happy for me to cut and paste here - maybe people have seen it before?
Making and fitting leather washers
The following method is suitable for producing replacement washers for air pumps , airguns , etc.
Although some of the washers have just a retaining screw passing through the centre and some are much bigger and sit around a large brass piston end of about 3 inches diameter ( i.e., as in the Kismet Master , and Sequel ) the way of making them is much the same.
What you have to find is some decent leather that is not too thick ( or too thin ) i.e., nice and manageable . Cut a disc that is approx. half an inch larger all round than the diameter of the pump barrel that it will be running in . This will be the same for the different washers in the multi-barrelled pumps.
Make a central hole – as neat a fit as possible – for the securing screw to pass through ( or a large hole in the case of the Master / Sequel , etc. ).
Leave this new washer to soak in tepid water for a good hour , or even overnight. Now here is the real trick : put the wet washer onto the rod , or large piston and fix it in place with its screw or brass ring , Tighten down firmly. Around the washer place a jubilee clip ( water hose clip ) and tighten it until it is the same diameter as the pump barrel . What you have to do at this stage is to push the edges of the washer with a screw driver against the inner edge of the clip to get rid of the creases as much as you can. Because I make washers fairly often for the same types of pump , I have collected a few small sections of brass tubing to do the job of the jubilee clips , but the method remains the same.
Leave the new washer in place to dry naturally – overnight if necessary , and when dry , pare away any excess bits of leather from around the rim of the clip. You will need a really sharp blade to do this , and try to keep the edge equal all the way round.
Give the washer a good oiling after removing the clip , and insert the piston back into its barrel . Get straight into some serious pumping – and Bob should be your uncle. With the Kismet range – and others with a similar system – make sure to oil often through the hole in the side of the large barrel. Good Luck!
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