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Bobcat Skidsteer Forums
General Bobcat Skidsteer Forum
Hydraulic pump noise?
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<blockquote data-quote="HydraulicGuy" data-source="post: 872" data-attributes="member: 148"><p>rws, Does the groaning and loss of power only happen when it's cold? Assuming this is so and you have already checked the fluid level, It sounds like you have a problem either on getting fluid into the auxiliary pump or air is getting into the suction line. First I would check the suction hose feeding the auxiliary pump. Make sure it is not kinked or cracked, make sure the clamps are tight. For the $10.00 to $20.00, I would just replace it to make sure it's good. It could be collapsed internally as well. It is a good practice to put (2) clamps on each end and put the clamps 180 deg. from each other. Second, I would check the hydraulic fluid you have in it. If the fluid is to thick, this would cause cavitation when cold as well. I use AW32 hydraulic fluid in my 642B. This brings on the question, "How can you tell if it's to heavy of fluid?" The correct answer would be to send an oil sample in and have it tested but that's not the easiest thing to do. Go to your local farm store and buy a jug of AW32 hydraulic fluid and compare it when both fluids are the same cold temp. This pump not only handles all of the auxiliary functions but also "supercharges" both hydrostatic drives. If the auxiliary pump is "sucking air" or cavitating it would not only cause your bucket functions to fail, but also cause the drives to be irratic. Check those things out and get back to me with your findings. Hope this helps Regards</p></blockquote><p></p>
[QUOTE="HydraulicGuy, post: 872, member: 148"] rws, Does the groaning and loss of power only happen when it's cold? Assuming this is so and you have already checked the fluid level, It sounds like you have a problem either on getting fluid into the auxiliary pump or air is getting into the suction line. First I would check the suction hose feeding the auxiliary pump. Make sure it is not kinked or cracked, make sure the clamps are tight. For the $10.00 to $20.00, I would just replace it to make sure it's good. It could be collapsed internally as well. It is a good practice to put (2) clamps on each end and put the clamps 180 deg. from each other. Second, I would check the hydraulic fluid you have in it. If the fluid is to thick, this would cause cavitation when cold as well. I use AW32 hydraulic fluid in my 642B. This brings on the question, "How can you tell if it's to heavy of fluid?" The correct answer would be to send an oil sample in and have it tested but that's not the easiest thing to do. Go to your local farm store and buy a jug of AW32 hydraulic fluid and compare it when both fluids are the same cold temp. This pump not only handles all of the auxiliary functions but also "supercharges" both hydrostatic drives. If the auxiliary pump is "sucking air" or cavitating it would not only cause your bucket functions to fail, but also cause the drives to be irratic. Check those things out and get back to me with your findings. Hope this helps Regards [/QUOTE]
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General Bobcat Skidsteer Forum
Hydraulic pump noise?
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