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Crawlers, Dozers, Loaders & Backhoes Discussion Forum

Melroe 444

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07-19-2014 20:45:16

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Posted this before but didn't get any replies- on the back of my 444 is a cylinder. It is just above the motor to the left. There is an air valve (like you would see on a bicycle). I can not find this in the parts manual or service manual.

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07-20-2014 09:12:19

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 Re: Melroe 444 in reply to Gimbell, 07-19-2014 20:45:16  
If it"s got a Schrader valve on it, and is tied in with the hydraulics, it"s got to be an accumulator. Typically they are put on hydraulic systems to buffer shocks to the system. For instance if the machine has an aux connection and was being used with a hydraulic hammer, someone may have added it to help eliminate the surge/shock on the system caused by the hammer. Usually the hammer itself will have one on it, but who knows.

Along the same lines, if your traveling over a long distance with a load, it will also help take some of the shock out caused by the machine and load bouncing. I know several different brands used to use the same setup on their loaders in years past. Usually they were designed with a valve so you could put the accumulator into the system when traveling, and take it out when doing things like loading a truck, etc.

Beyond that I don"t know why anyone would put one in a system, as they are designed to do what I just described, or to accumulate oil, just as their name implies. In that case, basically what it does, is to increase the volume of the system, in essence storing more oil under pressure, to provide a surge of oil greater than the system itself can provide, to perform some function. They are using a setup like this right now on some big trucks doing stop and go driving (like garbage trucks) where the oil is compressed as the truck is running and brakes, and then releasing it to a hydraulic motor to help get the truck back up to speed when it pulls off, in an effort to reduce the load on the main diesel engine.

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07-20-2014 05:36:30

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 Re: Melroe 444 in reply to Gimbell, 07-19-2014 20:45:16  
I have a 444 too. No idea on the cylinder. Might be for a specialized attachment that's long gone. Could it be a hydraulic accumulator of some type? A picture might help clue someone in.

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07-20-2014 06:52:08

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 Re: Melroe 444 in reply to Bret4207, 07-20-2014 05:36:30  
Quoting Removed, click Modern View to see

Good idea. I'll post one in a couple of weeks once I'm back at the acreage. I'll get an idea of where all the hoses are going as well and post it. It would appear to have something to do with hydraulics.

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