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'89 Bobcat 743 control valve
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<blockquote data-quote="billrbg" data-source="post: 78411" data-attributes="member: 10970"><p>I should have updated this a couple of days ago, but have been waiting to put some run-time on it again. The lift-spool was leaking at the rear because I hadn't put the lip-seal in correctly. It looked both pinched in one area and "rolled" so the the lips were both pointing towards the OD, 90 deg. out of position. I might have been able to massage it back into shape, but I still had all the new quad-rings that were also in the kit, so used one of those. I did not touch the front of the valve, getting to ANYTHING there involves removing those hoses I am so fond of. For me, more than "hard to get out", impossible with the hoses in the way! Since I didn't remove the spool, *just* the detent parts, there was minimal fluid leakage. Plenty enough for me and my tools to be coated, of course, but not "buckets". I got the detent balls/springs out without losing them (slipped a paper-towel core tube over all when pulling), but lost-and-found balls several times out on the bench while trying to get the forward ones into the (big) spring cap. I have a good collection of steel balls, which is good, because I didn't find them every time they went flying! The rear detent balls/spring, that have to go in after the spring cap and detent plunger is back on the spool, would be impossible without a special tool. I don't think even that pliers arrangement shown in the FSM would work. I made something like a 2-piece shaft collar to hold those balls. If I had arms about 4-5 feet long this would have been easier, but it was, indeed, reasonably "doable". I'm sure hoping that one lip-seal failed because it was installed improperly, and that the other 7 will be OK! By the way, there are no seals in the detent parts, I was correct in thinking that could be left alone originally.</p></blockquote><p></p>
[QUOTE="billrbg, post: 78411, member: 10970"] I should have updated this a couple of days ago, but have been waiting to put some run-time on it again. The lift-spool was leaking at the rear because I hadn't put the lip-seal in correctly. It looked both pinched in one area and "rolled" so the the lips were both pointing towards the OD, 90 deg. out of position. I might have been able to massage it back into shape, but I still had all the new quad-rings that were also in the kit, so used one of those. I did not touch the front of the valve, getting to ANYTHING there involves removing those hoses I am so fond of. For me, more than "hard to get out", impossible with the hoses in the way! Since I didn't remove the spool, *just* the detent parts, there was minimal fluid leakage. Plenty enough for me and my tools to be coated, of course, but not "buckets". I got the detent balls/springs out without losing them (slipped a paper-towel core tube over all when pulling), but lost-and-found balls several times out on the bench while trying to get the forward ones into the (big) spring cap. I have a good collection of steel balls, which is good, because I didn't find them every time they went flying! The rear detent balls/spring, that have to go in after the spring cap and detent plunger is back on the spool, would be impossible without a special tool. I don't think even that pliers arrangement shown in the FSM would work. I made something like a 2-piece shaft collar to hold those balls. If I had arms about 4-5 feet long this would have been easier, but it was, indeed, reasonably "doable". I'm sure hoping that one lip-seal failed because it was installed improperly, and that the other 7 will be OK! By the way, there are no seals in the detent parts, I was correct in thinking that could be left alone originally. [/QUOTE]
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'89 Bobcat 743 control valve
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