Good evening everyone,
Many of you probably don't know me or have seen me around much since I mainly lurk rather than post. However, Im here to share some information in a series of posts that I certainly hope will be useful to more than just a few of you (some of you may know about the post subjects, but I feel a majority may not). I am a mechanic for a Case dealership and am learning more and more everyday in my line of work. I came from mainly a Cat background in my diesel experience, but I have always bled Case Power Tan since I was a little kid drawing and playing with toys of them.
Which brings up a point of my posts I will share with you, in no way, shape, or form am I slandering or saying anything negative about Case products. I will stick up for Case not just because I am a dealer employee, but because I truly feel they are the best backhoe available. However, I hate seeing people (especially those without warranties) pay an arm and a leg to have a down machine. Hopefully this can apply to my future posts as more experience comes along with issues found on these machines.
Volume 1 - The Dipper Cylinder
Issue: Lets just say Ill start with the most concerning issue. Ive only worked for my dealership for for a few months and I am working on my third 580SN with a completely distroyed dipper cylinder. The assumed cause is manufacturer defect, however it could also be overloading. Either way, the dipper cylinder should hold up to the abuse for longer than they do. Out of these machines, the hours have been 1700, 2300, and the current machine being worked on has 2100 hours (all approximately), not the average lifespan of a dipper cylinder. All of these machines have been Tier 4A 580 Super N's equipped with extendahoe's and mechanical/non-pilot backhoe controls. I believe the serial number in the Dealer Portal is listed as 564000+. This is not to say only these variants of 580N's are prone to dipper cylinder failures, these are the ones I personally have experience with as far as failures.
The end result in these failures is somehow the piston is being pressed into the walls of the barrels at unfavorable angles (once again, either overloading or a defect from the manufacturer), eventually destroying the seals and ending in the piston itself being gouged into wall of the barrel. When this happens (with repetition), the metal from the piston-to-barrel wall contact eventually finds itself being sent through the dipper cylinder lines and into the backhoe control valve where it jams up the dipper control spool. The complaint on every invoice is the dipper control lever is stuck or is rough. This is the point where the metal has traveled up to the dipper spool. If operation continues and the metal makes it through (freeing up the dipper spool in the process), the metal makes it to the hydraulic filter. If the metal is somewhere in transit and the machine is ran hard, the metal could make it through the hydraulic bypass and be dumped into the tank where it could then travel anywhere in the system (taking out seals, lines, and other cylinders in the process). Overall, a catastrophic failure.
The fix/'s:
Warranty - Make sure your unit has a warranty. If this failure happens, the cost of the repairs is all on you. If you end up not getting a warranty and this failure happens, you will most likely opt to replace the cylinder and backhoe valve and call it good. However, who knows how much metal made it past the filter or went through the bypass and into the tank without flushing the tank, cleaning all the lines, and disassembling and inspecting every cylinder for metal and damage.
Screens - This can be done two ways. Find the proper sized fittings from the backhoe control valve to the dipper cylinder lines that come equipped with screens (prefered), or build/use a screen and place it in the suction hose between the tank and the hydraulic pump. Ive seen the fittings and they are awesome, but they cost $50-$60 a piece and you need two. This would be the best bet as the screens should catch the metal and stop it from entering the backhoe control valve and the rest of the system. The only downfall is that you really wont know that you have a failure unless you notice the dipper cylinder drifting noticeably or slow dipper cylinder function due to the screens getting clogged. If you opt for the suction hose screen, metal will get into the system up to the point of the tank.
I will post pics tomorrow of the damage to the latest machine. I hope this info helps!
Many of you probably don't know me or have seen me around much since I mainly lurk rather than post. However, Im here to share some information in a series of posts that I certainly hope will be useful to more than just a few of you (some of you may know about the post subjects, but I feel a majority may not). I am a mechanic for a Case dealership and am learning more and more everyday in my line of work. I came from mainly a Cat background in my diesel experience, but I have always bled Case Power Tan since I was a little kid drawing and playing with toys of them.
Which brings up a point of my posts I will share with you, in no way, shape, or form am I slandering or saying anything negative about Case products. I will stick up for Case not just because I am a dealer employee, but because I truly feel they are the best backhoe available. However, I hate seeing people (especially those without warranties) pay an arm and a leg to have a down machine. Hopefully this can apply to my future posts as more experience comes along with issues found on these machines.
Volume 1 - The Dipper Cylinder
Issue: Lets just say Ill start with the most concerning issue. Ive only worked for my dealership for for a few months and I am working on my third 580SN with a completely distroyed dipper cylinder. The assumed cause is manufacturer defect, however it could also be overloading. Either way, the dipper cylinder should hold up to the abuse for longer than they do. Out of these machines, the hours have been 1700, 2300, and the current machine being worked on has 2100 hours (all approximately), not the average lifespan of a dipper cylinder. All of these machines have been Tier 4A 580 Super N's equipped with extendahoe's and mechanical/non-pilot backhoe controls. I believe the serial number in the Dealer Portal is listed as 564000+. This is not to say only these variants of 580N's are prone to dipper cylinder failures, these are the ones I personally have experience with as far as failures.
The end result in these failures is somehow the piston is being pressed into the walls of the barrels at unfavorable angles (once again, either overloading or a defect from the manufacturer), eventually destroying the seals and ending in the piston itself being gouged into wall of the barrel. When this happens (with repetition), the metal from the piston-to-barrel wall contact eventually finds itself being sent through the dipper cylinder lines and into the backhoe control valve where it jams up the dipper control spool. The complaint on every invoice is the dipper control lever is stuck or is rough. This is the point where the metal has traveled up to the dipper spool. If operation continues and the metal makes it through (freeing up the dipper spool in the process), the metal makes it to the hydraulic filter. If the metal is somewhere in transit and the machine is ran hard, the metal could make it through the hydraulic bypass and be dumped into the tank where it could then travel anywhere in the system (taking out seals, lines, and other cylinders in the process). Overall, a catastrophic failure.
The fix/'s:
Warranty - Make sure your unit has a warranty. If this failure happens, the cost of the repairs is all on you. If you end up not getting a warranty and this failure happens, you will most likely opt to replace the cylinder and backhoe valve and call it good. However, who knows how much metal made it past the filter or went through the bypass and into the tank without flushing the tank, cleaning all the lines, and disassembling and inspecting every cylinder for metal and damage.
Screens - This can be done two ways. Find the proper sized fittings from the backhoe control valve to the dipper cylinder lines that come equipped with screens (prefered), or build/use a screen and place it in the suction hose between the tank and the hydraulic pump. Ive seen the fittings and they are awesome, but they cost $50-$60 a piece and you need two. This would be the best bet as the screens should catch the metal and stop it from entering the backhoe control valve and the rest of the system. The only downfall is that you really wont know that you have a failure unless you notice the dipper cylinder drifting noticeably or slow dipper cylinder function due to the screens getting clogged. If you opt for the suction hose screen, metal will get into the system up to the point of the tank.
I will post pics tomorrow of the damage to the latest machine. I hope this info helps!
Things you need to know about the 580N Volume 1 (Dipper Cylinder)
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