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Couple ?'s on hydro system L555 or similar models
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<blockquote data-quote="irwin" data-source="post: 26551" data-attributes="member: 2385"><p>Next phase:</p><p>I disassembled the old pump took the old shaft and put it in the outer trans splined hole. It's solid no slip.</p><p>Installed the new pump and filled the system up to the full line on dipstick. Shut the throttle off and cranked the engione over 6 times for 15-20 seconds each.. The hydro charvge light did not go out. I let it rest for 1/2 hour and did it again..still hydro charge light on..not even a flicker..(I'm concerned about damaging the new pump seals) While it was cranking I had my hand on the pump..it feels like it's spinning.</p><p>(note: I replaced both hydro filters while the system was down, so it has more air pockets)</p><p>Does it take long to build up pressure?</p><p>I'm about ready to do as Tazza suggested here ..</p><p><span style="color: #006400">"The pump should self prime, but i found the best way was to <span style="font-size: 15px">use a<strong> lift ram, extending it while operating the controls</strong></span><strong>.</strong> This draws oil up through the pump and into the cylinder. It can take a bit of effort to pull the ram stick by hand, but can be done."</span></p><p><span style="color: #000000"></span></p><p><span style="color: #000000">Will it draw fluid through the pump with the pump static (not turning)?</span></p><p><span style="color: #000000">If I try this with the key on and the foot control pressed in the correct (lift) position will this be enough to suck any air from the lines, control valve, + gearpump?</span></p><p> <span style="color: #000000">And Earthwerks said ."</span></p><p><span style="color: #000080">There's no pressure being built up so it follows no suction either."</span></p><p><span style="color: #000000">How do I insure pressure can build? Or should I be looking for another problem?</span></p><p>I'm not afraid of taking something apart..but I am concerned about spending a lot of time if it's not beneficial.</p><p>I'm hoping for some good news soon.<img src="https://www.skidsteerforum.com/DesktopModules/AdverForums/ImageGallery/emotion-6.gif" alt="" class="fr-fic fr-dii fr-draggable " style="" /> <img src="http://machineunderground.com/images/smilies/biggrin.gif" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p><span style="color: #000000">The engine purrs like a kitten and the hydraulics were very strong before this failure. I'm trying to wrap my head around how the hydraulic pressure and the gear pump work. My reason says..if the pump pushes enough fluid there will be pressure..is this right? </span></p></blockquote><p></p>
[QUOTE="irwin, post: 26551, member: 2385"] Next phase: I disassembled the old pump took the old shaft and put it in the outer trans splined hole. It's solid no slip. Installed the new pump and filled the system up to the full line on dipstick. Shut the throttle off and cranked the engione over 6 times for 15-20 seconds each.. The hydro charvge light did not go out. I let it rest for 1/2 hour and did it again..still hydro charge light on..not even a flicker..(I'm concerned about damaging the new pump seals) While it was cranking I had my hand on the pump..it feels like it's spinning. (note: I replaced both hydro filters while the system was down, so it has more air pockets) Does it take long to build up pressure? I'm about ready to do as Tazza suggested here .. [COLOR=#006400]“The pump should self prime, but i found the best way was to [SIZE=4]use a[B] lift ram, extending it while operating the controls[/B][/SIZE][B].[/B] This draws oil up through the pump and into the cylinder. It can take a bit of effort to pull the ram stick by hand, but can be done.”[/COLOR] [COLOR=#000000] Will it draw fluid through the pump with the pump static (not turning)? If I try this with the key on and the foot control pressed in the correct (lift) position will this be enough to suck any air from the lines, control valve, + gearpump? And Earthwerks said .“[/COLOR] [COLOR=#000080]There's no pressure being built up so it follows no suction either.“[/COLOR] [COLOR=#000000]How do I insure pressure can build? Or should I be looking for another problem?[/COLOR] I'm not afraid of taking something apart..but I am concerned about spending a lot of time if it's not beneficial. I'm hoping for some good news soon.[IMG]https://www.skidsteerforum.com/DesktopModules/AdverForums/ImageGallery/emotion-6.gif[/IMG] [IMG]http://machineunderground.com/images/smilies/biggrin.gif[/IMG] [COLOR=#000000]The engine purrs like a kitten and the hydraulics were very strong before this failure. I'm trying to wrap my head around how the hydraulic pressure and the gear pump work. My reason says..if the pump pushes enough fluid there will be pressure..is this right? [/COLOR] [/QUOTE]
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Couple ?'s on hydro system L555 or similar models
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