Well the story so far. After recently acquiring a 73 singlecab which has been languishing in an industrial estate car park for 3 plus years I've now with the help of a recovery truck managed to get it back to my gaff. Now it does run, surprisingly, but it certainly doesn't stop. Before it goes back on the road I'm going to renew all the fuel hoses in the engine bay to R9 plus the fuel tank hose under the tank and a good engine service. Now to brakes . It has a servo and the brakes are spongey but I can pump them up momentarily then the pedal goes to the floor. Is this air in the system a servo problem or a hydraulic leak ? Just not sure where to start looking first. This pickup has had a shed fall of money spend before it was layed up which I know doesn't always means it was done well. I can see its had new front calipers from sight the rest I don't know at the moment.
It’s either leaking fluid from one or more of the brake cylinders or the master cylinder is leaking internally. Remove the brake drums and peel back the boot on the slave cylinders, they’re shouldn’t be any fluid.
There doesn't seem to be any fluid leak I can see but I havnt looked at the rear cylinders internally.I thought it may be the master cylinder seals. Would the front calipers sticking cause these symptoms ? . Regarding R9 hose I thought it was the best available.
No, there is a leak, either at the rear cylinders – remove the drum and look - or more likely within the master cylinder – you won’t see the leak. In theory SAE 30R9 is suitable for ethanol enhanced fuel, in practice it doesn’t last long, sometimes just a few months. Use 100% ethanol proof hose.
Thx for the advice I'll check the cylinders first and go from there and look for some ethanol proof hose
