Front Hydraulic Pump

BIG1RED9

Member
Morning Everyone,

For my loader spool replacement I wanted to have the pump specifications. The original Cessna was replaced with a Commercial P15H for which a helpful engineer at Commercial provided the specs. 3.5 gpm at 2000 psi. Although I do not have an understanding, from what I have read there is no way that would power the backhoe. I guess I am surprised that the loader moved quick enough for me to do anything.

So now I need to plan on changing the pump, filtration and the valve. Given the amount of fluid the 102 load frame hold and heat buildup, are there any suggestions about max gpm sizes?

Thank you,
Don
 
Both my Ford tractor with loader and or back hoe have the Vickers pump that is in the 8-10GPM range. One does not want a pump that has real high GPM or one can end up flipping a tractor over or landing what was in the bucket on top of ones self either one which can be deadly. Seen more then one tractor where a guy would put on a 20 plus GPM pump and end up dead in less then a month
 

I use a shovel and wheelbarrow now, so I am in no rush. Had not considered that one could get the load up so fast as to flip.

It came from the factory with a 17gpm. Not looking for speed, but I want to make sure the backhoe will work for digging stumps, planting trees, trenches, creating dams on our stream, dig a pond etc.. If the 3.5 works, then no need for a 25 to 30 gpm spool.

Thanks,
Don
 
GPM controls the speed at which the work is done. PSI controls the work that can be done. My backhoe tractor is an 8N ford and has the 8-10 GPM pump and it is slow but then again it is only 23HP. It will dig down to around 18 feet if you do it right
 
MF model 102 loader specifications
Hydraulic pump: 17gpm, at 2000rpm, at 2150psi
Loader spool valve: 20gpm, max 2150psi
Filter capacity: 20gpm
Capacity: complete system 6 gallons
Pry out capacity: 4500lbs
 
(quoted from post at 12:48:52 12/05/17) GPM controls the speed at which the work is done. PSI controls the work that can be done. My backhoe tractor is an 8N ford and has the 8-10 GPM pump and it is slow but then again it is only 23HP. It will dig down to around 18 feet if you do it right



What mode loader do you have?
 
(quoted from post at 13:14:02 12/05/17)
(quoted from post at 12:48:52 12/05/17) GPM controls the speed at which the work is done. PSI controls the work that can be done. My backhoe tractor is an 8N ford and has the 8-10 GPM pump and it is slow but then again it is only 23HP. It will dig down to around 18 feet if you do it right



What mode loader do you have?

PT, if your asking me...I have the 102 loader and 185 backhoe.
 
(quoted from post at 13:10:38 12/05/17) MF model 102 loader specifications
Hydraulic pump: 17gpm, at 2000rpm, at 2150psi
Loader spool valve: 20gpm, max 2150psi
Filter capacity: 20gpm
Capacity: complete system 6 gallons
Pry out capacity: 4500lbs

I have an older manual
Form number 690 318 M1

It lists the pump at 12gpm at 1500 RPM at 1500psi
I wonder if its the same pump, but at different RPM's ?
 

In the 185 parts book (could not find operating manual). It mentions a 12gpm Cessna constant flow pump, but not the RPM.

Taking some aspirin
 
(quoted from post at 16:12:19 12/05/17)
In the 185 parts book (could not find operating manual). It mentions a 12gpm Cessna constant flow pump, but not the RPM.

Taking some aspirin




I know the feeling, every manufacturer has some of their own "specs" (or some things they don't specify) for a hydraulic system .

I talked to my brother a little bit on hydraulics since he knows more about hydraulics than I do, and he says having a control valve that can handle more gpm than what the pump puts out doesn't hurt anything. Having valve that can't handle the gpm of the pump is a different story. I found the specs for the smaller model 99 loader, 9.5gpm pump, at 2000rpm, at 2150 psi. The control valve 20gpm, at 2150psi, and it holds 3.5 gallons.

When you think about it, how often, and or how long are you going to operate the pump at its maximum capacity. Like my 743B Bobcat, I rarely run it at full throttle because I usually don't need to use it that hard very often for what I use it for.
 

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