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General Bobcat Skidsteer Forum
'89 Bobcat 743 control valve
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<blockquote data-quote="billrbg" data-source="post: 78130" data-attributes="member: 10970"><p>Gloriosky, it's DONE! ...sorta-kinda. I thought I had it whupped, once I was down to just that leaking hose. However, this beast lived up to its name and put up a spirited fight all the way. As promised, I ran out to the local Bobcattery for a hose at my first chance. We couldn't positively identify the hose in the IPBs, and none of the candidates were in-stock anyway. The parts guy showed me where to look for a P/N on the hose, if it was OEM, and also advised that they could make one "per sample" if necessary. I went home to remove the hose. The pump-end was easy, lots of access and took only about a minute. Better yet, I discovered that oil only gushed out of the pump fitting, which I quickly capped. The open hose just trickled the fluid already in there. The hard-to-reach end, back at the Control Valve, was a whole different story, took an hour or more! That fitting was very tight, it required the long cheater-pipe again, but it finally did loosen. Trouble is, the flats got rounded just a bit, such that the adjacent flats were buggered-up enough the the crowfoot wouldn't fit on them with out forcing it on/off clumsily with a long screwdriver. Also, the hose nut seemed to be distorted enough to be non-free-running. It was a tedious process of place the crowfoot, attach the ratchet, move 1/6th turn, then remove all and start again. Add in a few droppings of the crowfoot into the now-newly-oiled bilges, and removal with long tweezers (surgical hemostat, actually), and there you are. There was a P/N on the hose (on the non-visible end, of course), and the Bobcattery even had all the pieces to make it. The hose material was "non-stock", but they actually had a "remnant" just a few inches longer than needed! Yeah, but after that things took another turn for the worse. When I went to install the hose I discovered that the fittings, the hex size, was 1/16" bigger than the old one. No problem on the pump end, not only could I fit an adjustable wrench in there, but I have the needed 15/16" open-end wrench. The other end, though, meant I no longer had a crowfoot that fit. That would be a 2-day and $25 online order. Frustrated, I went ahead and made a crowfoot out of aluminum, took an hour or so. Using that, I got the hose back on, but still a very tedious one-hour process. This time, I found that the crowfoot had to be placed, then the extension attached, then the ratchet... for each flat-turn. The new hose still did no free-run on those threads. Either the old fitting (on Valve) was distorted/corroded or the threads in the hose were not quite right. Maybe a close metric "equivalent"? I tightened that fitting as tight as possible, until the aluminum crowfoot start to give, then fired-up the engine and found no leaking. I have a good crowfoot on order and will tighten that hose better tomorrow, but was able to exercise all the hydraulics and things now look good. I will post again in a few weeks, after some run-time on that Control Valve with the lip-seals instead of quads. In the meanwhile, my thanks to all that helped me here, especially OM for the IPB and FSM</p></blockquote><p></p>
[QUOTE="billrbg, post: 78130, member: 10970"] Gloriosky, it's DONE! ...sorta-kinda. I thought I had it whupped, once I was down to just that leaking hose. However, this beast lived up to its name and put up a spirited fight all the way. As promised, I ran out to the local Bobcattery for a hose at my first chance. We couldn't positively identify the hose in the IPBs, and none of the candidates were in-stock anyway. The parts guy showed me where to look for a P/N on the hose, if it was OEM, and also advised that they could make one "per sample" if necessary. I went home to remove the hose. The pump-end was easy, lots of access and took only about a minute. Better yet, I discovered that oil only gushed out of the pump fitting, which I quickly capped. The open hose just trickled the fluid already in there. The hard-to-reach end, back at the Control Valve, was a whole different story, took an hour or more! That fitting was very tight, it required the long cheater-pipe again, but it finally did loosen. Trouble is, the flats got rounded just a bit, such that the adjacent flats were buggered-up enough the the crowfoot wouldn't fit on them with out forcing it on/off clumsily with a long screwdriver. Also, the hose nut seemed to be distorted enough to be non-free-running. It was a tedious process of place the crowfoot, attach the ratchet, move 1/6th turn, then remove all and start again. Add in a few droppings of the crowfoot into the now-newly-oiled bilges, and removal with long tweezers (surgical hemostat, actually), and there you are. There was a P/N on the hose (on the non-visible end, of course), and the Bobcattery even had all the pieces to make it. The hose material was "non-stock", but they actually had a "remnant" just a few inches longer than needed! Yeah, but after that things took another turn for the worse. When I went to install the hose I discovered that the fittings, the hex size, was 1/16" bigger than the old one. No problem on the pump end, not only could I fit an adjustable wrench in there, but I have the needed 15/16" open-end wrench. The other end, though, meant I no longer had a crowfoot that fit. That would be a 2-day and $25 online order. Frustrated, I went ahead and made a crowfoot out of aluminum, took an hour or so. Using that, I got the hose back on, but still a very tedious one-hour process. This time, I found that the crowfoot had to be placed, then the extension attached, then the ratchet... for each flat-turn. The new hose still did no free-run on those threads. Either the old fitting (on Valve) was distorted/corroded or the threads in the hose were not quite right. Maybe a close metric "equivalent"? I tightened that fitting as tight as possible, until the aluminum crowfoot start to give, then fired-up the engine and found no leaking. I have a good crowfoot on order and will tighten that hose better tomorrow, but was able to exercise all the hydraulics and things now look good. I will post again in a few weeks, after some run-time on that Control Valve with the lip-seals instead of quads. In the meanwhile, my thanks to all that helped me here, especially OM for the IPB and FSM [/QUOTE]
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'89 Bobcat 743 control valve
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