Quick update for anyone who has followed this post:
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Had the valve out at work and everything appears as it should, it wasn't stuck inside and there was spring tension upon removal, ive felt and inspected the valve and there appears to be no burs or damage nor inside the bore and it was clean in itself no tarnish.
Tested the part by pushing it in and out several times and couldnt get it to stick, Gave the valve a quick clean up and flush too before re-installing.
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Ive inspected the shaft and there isnt any play (float/lift checked and radially with a clock) the movement of the shaft is very smooth and seals all look good, so on that basis i don't think i will be taking it apart. The pumps only covered 85k miles anyway, im sure theres original ones with many hundred thousand out there too?!
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Finally, having used a puller to get the pulley off, i have found the problem of the 'wobbly pulley' that i probably didn't mention before
The shaft has fretted excessively due to a loose nut and worn a nice step into the bore of the pulley and in the removal process taken what was left with it from the casting
On the positive side there is zero damage to the 'harder' shaft however will require another woodruff key.
I am now in the process of making a new stainless pulley sprocket out of billet at work on a lathe.
Im guessing after a quick look spares are no longer available! Let alone in the U.K
Im hoping i don't have to machine my way into every spare for this truck for the future!
On the basis of fixing it above, i have a re-con steering box coming over from the states for a very reasonable $650 which is about £460.
Im also happy with the pump and hoses now, so will change the belts and see how it goes. Wish me luck! Thanks for your help with this one.
- Going to look into fitting an IN-LINE relief valve in the pipework somehow, ill do a post when i do
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