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Message: <blockquote data-quote="Tazza" data-source="post: 8494" data-attributes="member: 82">It really is MUCH easier if you can pull the valve out, but removing the valve is a real pain. If you remove it, replace that hose under the spool! its only a return line but its a pig to replace when still in the machine (as you have already noticed).As jmatt20 said, if its leaking from the top cap its almost definatly the spool seal. These valves run a quad ring at the front and back of the spool. Being the top it should be reasonably easy to replace. Un-do the linkage at the front, give it a good clean! remove the 2 allen screws at the front and remove the dust cover, give it another good clean. Remove the 2 allen screws at the back and carefully remove the cover, i can't remember if this is the lift or tilt function, if its lift it will have 2 detent balls that will shoot out. If its tilt its all good, just slide it off. With the cover off grab hold of the spring at the end of the spool and pull the spool out.With the spool out remove the steel caps front and back and remove the quad rings, you'd be best to get a genuine bobcat kit for this as you know they are rite. Give them a good oil up and slide the cap on the spool and slide the new quad ring on. Oil it up and carefully slide the spool back in. Don't pinch the quad ring or it will be cut and useless. when the back is in, install the front by sliding the new ring on with oil and replace the steel retainer. Replace the cap and dust cover (replace the dust cover if its split). then its all good.It may sound hard, but sreiously its quite easy.I have done 4 valves like this, 2 off 743's and the other 2 were off other machines. Just take your time and make sure the seals that go in match what came out unless its an upgrade. Some seals have a rite and wrong way to be installed. Just keep it all clean and you will be fine.</blockquote>

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