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Bobcat Skidsteer Forums
General Bobcat Skidsteer Forum
My new ride..an old 720
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<blockquote data-quote="kilohertz" data-source="post: 51572" data-attributes="member: 6974"><p>Hello all,</p><p>Well good news to report this time. I started it this morning and burned out all the ATF that was sitting in there then took it for a good ride around the yard and moved some more snow. I emptied the fuel filter of all the water that had collected in the last few days, will probably take a few tanks to get all of it out but once gone, will put in a new canister filter. I then put on a vacuum gauge to see what was going on and sure enough, I could see the needle swinging around like mad, indicated sticking valves. Then, I did some internet research about ATF and carbon and found lots of hot rod info from 50's-70's about cleaning combustion chambers without pulling the heads. There were many references to spraying small amounts of water and ATF into the carb while the engine is at about 2000 RPM, letting it sputter and loosen up the carbon and spit it out. So I rigeed up a vacuum hose to the hole on the intake and made up a mix of snow melted water and ATF , then let the engine drink it up slowly, took about 5 minutes to suck up 16 oz. It sputtered a few times while doing this and caught up then when it was done, I took it out for another spin with the vacuum gauge still attached and noticed a big improvement in the gauge reading and the the power the machine had. It continued to get better and by the time I quit, about 1/2 hour, I shut it down and checked the compression again and found it now to be 50PSI, big improvement from yesterday. So it's soaking in ATF again and will repeat this afternoon and that should have it!! Yeah. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p><p>I'll keep you posted.</p><p>Cheers</p><p>Paul</p></blockquote><p></p>
[QUOTE="kilohertz, post: 51572, member: 6974"] Hello all, Well good news to report this time. I started it this morning and burned out all the ATF that was sitting in there then took it for a good ride around the yard and moved some more snow. I emptied the fuel filter of all the water that had collected in the last few days, will probably take a few tanks to get all of it out but once gone, will put in a new canister filter. I then put on a vacuum gauge to see what was going on and sure enough, I could see the needle swinging around like mad, indicated sticking valves. Then, I did some internet research about ATF and carbon and found lots of hot rod info from 50's-70's about cleaning combustion chambers without pulling the heads. There were many references to spraying small amounts of water and ATF into the carb while the engine is at about 2000 RPM, letting it sputter and loosen up the carbon and spit it out. So I rigeed up a vacuum hose to the hole on the intake and made up a mix of snow melted water and ATF , then let the engine drink it up slowly, took about 5 minutes to suck up 16 oz. It sputtered a few times while doing this and caught up then when it was done, I took it out for another spin with the vacuum gauge still attached and noticed a big improvement in the gauge reading and the the power the machine had. It continued to get better and by the time I quit, about 1/2 hour, I shut it down and checked the compression again and found it now to be 50PSI, big improvement from yesterday. So it's soaking in ATF again and will repeat this afternoon and that should have it!! Yeah. :-) I'll keep you posted. Cheers Paul [/QUOTE]
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My new ride..an old 720
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