8n dearborn loader

Anonymous-0

Well-known Member
I was wondering if anybody knows how many gpm the old loader puts out and what kind of what kind of valve control it has bucket also uses hydraulics need to know because might replacing it surplus asked question when I talked to them Or is it easy to rebuild it Thanks Jim
 
(quoted from post at 15:26:45 08/18/14) I was wondering if anybody knows how many gpm the old loader puts out and what kind of what kind of valve control it has bucket also uses hydraulics need to know because might replacing it surplus asked question when I talked to them Or is it easy to rebuild it Thanks Jim

Depends on the model but a 10-12 GPM pump should be plenty - figure roughly $125.

You will need an open center two spool control valve. The bucket cylinder spool must be double acting. Dearborn lift cylinders were typically single acting but you will be hard pressed to find an OTS vlave in that configuration. A double acting spool can be used for the lift cylinders as well. Simply connect the unused work port to the return line to prevent deadheading the pump. Figure a scant $200 for a basic OEM type valve with two DA spools. A bit more if you want more modern control features like float or regen....

TOH
 
Both pumps I have on my Ford tractor with loaders are an 8-10GOM pump. You do not want a very high GPM on a loader or you can flip the thing over due to the lift coming up way to fast
 
When I replaced 2 spool control valve on my Dearborn 19-61 loader I bought from a local hydraulic dealer they converted 1 spool to single action. Maybe surplus center can do same thing. I believe I have a 10gpm pump and it is wicked fast picking up, I have to feather the spool to slow it down.
 
(quoted from post at 10:21:17 08/19/14) When I replaced 2 spool control valve on my Dearborn 19-61 loader I bought from a local hydraulic dealer they converted 1 spool to single action. Maybe surplus center can do same thing. I believe I have a 10gpm pump and it is wicked fast picking up, I have to feather the spool to slow it down.

For constant displacement pumps (e.g. most gear/vane pumps) flow rate needs to be specified at a pump RPM. Early Dearborn documentation didn't provide a pump flow specification but the 19-97 had essentially the same size lift cylinders as the 19-61 and that pump was rated 11.5 GPM @ 1700 RPM. That works out to 13.53 GPM @ 2000 RPM which is the speed at which most modern pumps are rated.

TOH
 
Hey thanks would a two spool valve be so I could put down pressure on the loader the new lift cylinder I purchased a while he said you can do that The reason for changing now is the bucket wont stay in position thanks Jim
 
(quoted from post at 12:55:49 08/19/14) Hey thanks would a two spool valve be so I could put down pressure on the loader the new lift cylinder I purchased a while he said you can do that The reason for changing now is the bucket wont stay in position thanks Jim

You need a two spool valve because you indicated you have both lift arm and bucket cylinders. If the loader has a trip bucket you only need a one spool valve. A one spool valve can be either single acting or double acting.

To get down pressure on the loader you need double acting lift cylinders and a double acting control valve. If the old valve is single acting changing the cylinders alone is not enough. You would need to replace the single acting valve with a double acting valve.

TOH
 
I run a Dearborn 19-71. Originally came with a 6 GPM Vickers vane pump. Able to lift my cement ballast weighting 720 lbs no problem. Speed was pretty good also.

Just cause I wanted to see what these pumps were all about and I like to tinker, I picked up an 9GPM off of ebay for $65. Beat up and rusted. Cleaned here up and replaced the bearing, seal and vanes and smoothed down the internal pump surfaces. I now run the 9 GPM pump. As "Old" said its probably just where I need it. Any higher rated pump and I could probably scoop dirt and flip it over my back into a dump behind me. You can still get parts for those. Hard to find but you still can.
 
What usually goes wrong with control valve that makes them so the bucket wont stay in place if it is control valve cylinders don't look like they are leaking a bunch. I took control valve apart some rust on rod inside but nothing serious,going to put news seal in end was leaking some THanks again for info JIm
 

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