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Crawlers, Dozers, Loaders & Backhoes Discussion Forum

Re: 2500# cyl in a 2700# system

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01-26-2013 22:11:01

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If I were in your position I'd check the system and see if there is a port relief on both sides of the extend cylinder circuit. If there is there would definately be no problem using the cylinder if you set the port relief to 2500. By doing that it would pop before main relief did so that one cylinder would never see the full 2700 psi of system pressure.

Beyond that my only suggestion would be to call the cylinder mfg and ask them. Most all hydraulic components are designed with a safety factor enginered in to insure they don't rupture due to a pressure spike, etc. That said, 200 psi difference isn't that much so it might very well work just fine but given the dangers involved with high pressure oil I still wouldn't feel comfortable saying it would definately work without consulting the mfg.

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01-27-2013 23:19:21

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 Re: 2500# cyl in a 2700# system in reply to NCWayne, 01-26-2013 22:11:01  
Well the machine is sort of a fixer upper (the only reason it was priced low enough for me to buy it). 2 bad cylís on the hoe, multiple cracks in the backhoe and generally just behind on maintenance. Due for all new fluids and filters. Needless to say Iím on a budget and Iím just all around cheap to begin with. I called cat about the cylís and they are no longer available. Looked around a bit and a used one is around 1000$-14000$. I thought about just replacing the barrel on mine but the honed tubing is sold by the inch and a 48Ē piece was more expensive than just buying a total new cyl from prince. Plus I would have to cut threads into it to screw my packing into which would not be cheap. So that is why I bought a utility cyl for around 330$. If you know of a hydraulic shop that can re-barrel a cyl affordably Iím all ears because I still have the bucket cyl to do. The previous owner couldnít get the packing gland to unscrew so he took a torch to it and cut the cyl apart around the rod.

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01-29-2013 21:17:59

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 Re: 2500# cyl in a 2700# system in reply to gusbratz, 01-27-2013 23:19:21  
Don't know where your located, but you might try giving SHP and HCR both a call. Both are somewhat local to me, with SHP being about an hour or so South into SCI, and HCR being about an hour North, and I've done business with both numerious times over the years (SHP the most). Both places do good work at reasonable prices. I say that dependent upon what you call reasonable, cause a custom cylinder can often be more expensive than a standard, off the shelf one, but still less than one from the OEM. Hope this helps, and good luck.

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