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Case skid steer - horrible groaning noise from pumps/motors
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<blockquote data-quote="tedf" data-source="post: 2450" data-attributes="member: 340"><p>>> Does the noise come when you lift or dump the loader or does it make the noise when you drive the wheel, they all groan on the drives some, the harder it is to turn the tires, the more noise my bobcat makes, and more so at lower rpm. Thats my expierience.</p><p>Only when driving wheels (loader works fine)... the harder it is to turn, the groaning noise is even worse.... so pretty sure its in the pumps or motors.</p><p>>> Has this noise been there as long as you have owned the unit? Is it getting noticably worse, or are you not quite sure, but think so?</p><p>its had noise since i've had it.. not sure if getting worse. sometimes it sits for months, then i use it for a while and sits again..so hard to compare.</p><p>>> The functions (r and l drives, lift tilt) are smooth and powerful, or do they jerk and surge as they are moved? Air (cavitation) in the system would make the system jerky.</p><p>usually smooth and have power. sometimes/occasionally they will jerk (rip control lever out of my hand), and stall the machine... which may have just been fluid had gotten low.</p><p>Sometimes it seems like i'm putting as much hyd fluid in it, as diesel. :^)</p><p>>> Is the hyd tank oil level higher then the pump and hydros, if so a suppy line to the pump or hydros would leak oil out when the machine sits. Colapsed suction hoses and air getting in the suction side of the system will make the drives and lift feel jerky.</p><p>Hyd tank is inside the uprights(back half of machine), so they are above pumps. i need to clean the machine/belly pan.. so much dirt and old oil, its hard to see a leak.. and a suction line leak could be really small.</p><p>>> When you changed the filters did you cut them open and inspect for aluminum, steel or any other contamination.</p><p>No, but that sure is a good idea. i usually look through the oil and at the filter.. and nothing noticeable.. like metal chunks/shavings.</p><p>>> Can you find someone else with a 1845 to compare to.</p><p>Thats a good idea.. i know of one not too far away.</p><p>>> If the wrong oil was used, I don't believe this in itself would cause a noise. If the wrong oil cause something mechanical to tear itself apart, that could cause a noise. (the sound of the mechanical destruction) In this case your filters should be full of trash, and the system should not operate in a normal, powrful and smooth manner. Does it do it for both the right and left wheels and in both forward and reverse? Because the left and right are separate mechanical systems but the share the same oil, some plumbing, but if one acts different then the other its a sure sign of trouble. Putting the machine on blocks and running each side forward and back may make it easier to listen for where the noise comes from. But with the whells turning freely they hydros should be quiet because they are doing almost no work.</p><p>i've run it up on blocks before.. and like you said, its fairly quite then. i may do this again and see if something - motor/pump, etc is noiser (use a funnel up to your ear as megaphone to find the noise)</p><p>>> Btw how many house are on the machine?</p><p>This is old machine.. made around 1975 - 1980.. but not sure on hours.</p><p>i was wondering what the pumps and motors sound like as they get "older" and worn out? if this is just a sign of old age (like me)... i can tell that one of the pumps has been rebuilt/replaced (its a different color than the machine).. but no history on anything else and how many hours, etc.</p><p>>> I'd contact case and see if their tech will answer any question for you. Like what charge press should be and where to hook the guage. Problems common to this machine. Their feelings about what you describe. Oils that can be used. If they value their customers they should be willing to help a little for (almost) free I've never owned a case, so these sugestions are general in nature but could be applied to most any hydro driven loader. Maybe someone else can be of more help Ken</p><p>i need to call Case and check on the fluid types, additives, press readings at service points, etc... they should answer that at least.</p><p>Thanks Ken....</p></blockquote><p></p>
[QUOTE="tedf, post: 2450, member: 340"] >> Does the noise come when you lift or dump the loader or does it make the noise when you drive the wheel, they all groan on the drives some, the harder it is to turn the tires, the more noise my bobcat makes, and more so at lower rpm. Thats my expierience. Only when driving wheels (loader works fine)... the harder it is to turn, the groaning noise is even worse.... so pretty sure its in the pumps or motors. >> Has this noise been there as long as you have owned the unit? Is it getting noticably worse, or are you not quite sure, but think so? its had noise since i've had it.. not sure if getting worse. sometimes it sits for months, then i use it for a while and sits again..so hard to compare. >> The functions (r and l drives, lift tilt) are smooth and powerful, or do they jerk and surge as they are moved? Air (cavitation) in the system would make the system jerky. usually smooth and have power. sometimes/occasionally they will jerk (rip control lever out of my hand), and stall the machine... which may have just been fluid had gotten low. Sometimes it seems like i'm putting as much hyd fluid in it, as diesel. :^) >> Is the hyd tank oil level higher then the pump and hydros, if so a suppy line to the pump or hydros would leak oil out when the machine sits. Colapsed suction hoses and air getting in the suction side of the system will make the drives and lift feel jerky. Hyd tank is inside the uprights(back half of machine), so they are above pumps. i need to clean the machine/belly pan.. so much dirt and old oil, its hard to see a leak.. and a suction line leak could be really small. >> When you changed the filters did you cut them open and inspect for aluminum, steel or any other contamination. No, but that sure is a good idea. i usually look through the oil and at the filter.. and nothing noticeable.. like metal chunks/shavings. >> Can you find someone else with a 1845 to compare to. Thats a good idea.. i know of one not too far away. >> If the wrong oil was used, I don't believe this in itself would cause a noise. If the wrong oil cause something mechanical to tear itself apart, that could cause a noise. (the sound of the mechanical destruction) In this case your filters should be full of trash, and the system should not operate in a normal, powrful and smooth manner. Does it do it for both the right and left wheels and in both forward and reverse? Because the left and right are separate mechanical systems but the share the same oil, some plumbing, but if one acts different then the other its a sure sign of trouble. Putting the machine on blocks and running each side forward and back may make it easier to listen for where the noise comes from. But with the whells turning freely they hydros should be quiet because they are doing almost no work. i've run it up on blocks before.. and like you said, its fairly quite then. i may do this again and see if something - motor/pump, etc is noiser (use a funnel up to your ear as megaphone to find the noise) >> Btw how many house are on the machine? This is old machine.. made around 1975 - 1980.. but not sure on hours. i was wondering what the pumps and motors sound like as they get “older“ and worn out? if this is just a sign of old age (like me)... i can tell that one of the pumps has been rebuilt/replaced (its a different color than the machine).. but no history on anything else and how many hours, etc. >> I'd contact case and see if their tech will answer any question for you. Like what charge press should be and where to hook the guage. Problems common to this machine. Their feelings about what you describe. Oils that can be used. If they value their customers they should be willing to help a little for (almost) free I've never owned a case, so these sugestions are general in nature but could be applied to most any hydro driven loader. Maybe someone else can be of more help Ken i need to call Case and check on the fluid types, additives, press readings at service points, etc... they should answer that at least. Thanks Ken.... [/QUOTE]
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