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Massey Harris & Massey Ferguson Tractors Discussion Forum
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MF 255 Loader Hydraulics

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Saltherring

12-11-2007 10:15:31




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I am helping a family member install a MF 236 loader on his MF 255 tractor. Bolt-on was simple, but now the hydraulics. The tractor has the 10-GPM internal auxiliary pump, with supply/return piping extending from the round cover with the PTO lever. The lower pipe, which runs through the filter and on to the remotes, warms with the engine running, so I am assuming it is the supply. Should I "tee" into this line? If so, where should I put the return? We plan on hard-piping over the transmission hump with half-inch, .049 wall, steel tubing using swage-lok fittings, ultimately placing quick disconnects on the lower right fender. Hoses would then run to the two-lever valve. Any guidance would be appreciated. Thanks!

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DavidP, South Wales

12-11-2007 14:37:39




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 Re: MF 255 Loader Hydraulics in reply to Saltherring, 12-11-2007 10:15:31  
Hi,
All good advice below but remember you will only have the blow-off pressure available at the auxillary pump which I believe will be 1800PSI.
YOu will have far more capacity connecting the loader to the main pump although it will lift a bit quicker.
DavidP, South Wales



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135 Fan

12-11-2007 16:35:07




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 Re: MF 255 Loader Hydraulics in reply to DavidP, South Wales, 12-11-2007 14:37:39  
Did you mean it will lift "slower" with the main pump? Dave



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DavidP, South Wales

12-12-2007 00:30:16




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 Re: MF 255 Loader Hydraulics in reply to 135 Fan, 12-11-2007 16:35:07  
Yes, it is likely to be slower on the main pump. Depending on what is fitted to the tractor you may have the choice of two pumps or be able to combine the flow if you have the combining valve fitted on the front of the hydraulic cover. Combining the flow will cause the loader to 'shoot' up but your lifting capacity will be restricted to the maximum pressure that the aux pump can generate. This is normally lower that the main pump.
Cheers
DavidP, South Wales

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Saltherring

12-11-2007 18:11:53




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 Re: MF 255 Loader Hydraulics in reply to 135 Fan, 12-11-2007 16:35:07  
135 Fan,

I think he must have meant slower. I've seen loaders attached to the main pump where you could eat your lunch in the time it took to raise them. In contrast,we hooked the existing hoses from the 236 loader to the remotes on the 255 just to check it out and it's as fast as the Quicke loader on my 2-year-old MF 481.



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J SWAN

12-11-2007 13:59:14




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 Re: MF 255 Loader Hydraulics in reply to Saltherring, 12-11-2007 10:15:31  
I UNDERSTAND IF YOU WANT TO USE STEEL LINES,BUT DON'T FORGET IF YOU UNPLUG THE LOADER TO TAKE IT OFF TO MAKE A SHORT HOSE TO PUT INTO EACH COUPLER TO AGAIN COMPLETE THE CICUIT.DO NOT RUN THE TRACTOR WITH THE LINES DISCONNECTED.IT WILL MAKE THE PUMP LOAD UP.



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Saltherring

12-11-2007 14:12:02




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 Re: MF 255 Loader Hydraulics in reply to J SWAN, 12-11-2007 13:59:14  
JSWAN,

Understood from your previous post. Thanks again!

Where is your dealership? I am located in western Washington state and have previously owned a MF 65D (for over 30 years) and the 255 my brother-in law now has. My late father owned a TO35 and a 235. My brother-in-law owned a 165 for many years before buying my 255. I now own a 481 4WD with a Quicke loader. I bought it new and love it. Have a good day.

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J SWAN

12-11-2007 14:15:34




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 Re: MF 255 Loader Hydraulics in reply to Saltherring, 12-11-2007 14:12:02  
HOPE IT ALL GOES WELL ON THE INSTALL.WE ARE IN FORT WORTH TEXAS.GOOD LUCK



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J SWAN

12-11-2007 13:28:28




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 Re: MF 255 Loader Hydraulics in reply to Saltherring, 12-11-2007 10:15:31  
there is no reason to tie up the remotes . that way you could use them for other functions.taking the pressure line off is the best way to do this. and i forgot to say we have been a M.F.dealer for over twenty years.



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135 Fan

12-11-2007 16:32:40




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 Re: MF 255 Loader Hydraulics in reply to J SWAN, 12-11-2007 13:28:28  
I mentioned using the remotes in reply to his post about Teeing into the lines going to them. Dave



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135 Fan

12-11-2007 13:05:42




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 Re: MF 255 Loader Hydraulics in reply to Saltherring, 12-11-2007 10:15:31  
The filter on most systems is on the return side but you need to either get a manual or go to a dealer to get a copy of the proper hook up. Maybe someone on here will have it? If it's hooked up wrong will cause lots of problems and more than likely cost a lot to fix. For steel lines, you need to use seamless hydraulic tubing rated for the pressure you're using. JIC flared fittings are the most common for hydraulics. A good hydraulic shop could make the lines up for you. If you already have remotes, why not just hook the loader valve up to them? They couldn't be used at the same time anyway. You'd still need a hydraulic shop to help you set up the control valve for the loader to run off the remotes. Dave

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Saltherring

12-11-2007 13:30:51




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 Re: MF 255 Loader Hydraulics in reply to 135 Fan, 12-11-2007 13:05:42  
Dave,

Thanks for the input. My brother-in-law has a MF shop manual. I'll get it from him. Yes, I planned on using seamless tubing. JIC flares can split, and the double ferrule swage-loks are now used on 3,000 # systems with no leakage. I don't like to use remotes for loaders, with hoses hanging all over the place. That's why I prefer hard piping and short hoses with QD's. Thanks again.



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J SWAN

12-11-2007 12:45:35




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 Re: MF 255 Loader Hydraulics in reply to Saltherring, 12-11-2007 10:15:31  
DO NOT 'TEE' INTO ANYTHING . TAKE THE LINE OFF THAT GOES FROM THE SIDE PLATE DIRECTLY TO THE VALVE. HOOK A HIGH PRESSURE HOSE ONTO THE PLATE AND OVER TO THE LOADER VALVE ONTO INPUT SIDE.THEN HOOK ANOTHER HOSE ONTO TRACTOR REMOTE VALVE AND GO TO THE OUTLET SIDE OF LOADER VALVE.THIS COMPLETES THE CIRCUIT.IF YOU WANT IT QUICK DISCONNECT,PUT A MALE PIONEER TIP ON ONE SIDE OF THE LOADER VALVE AND A FEMALE COUPLER ON THE OTHER SIDE.THIS WAY WHEN YOU TAKE THE LOADER OFF YOU CAN PLUG EACH HOSE INTO ONE ANOTHER AND NOT DEADHEAD THE PUMP. HOPE THIS HELPS

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Saltherring

12-11-2007 13:45:52




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 Re: MF 255 Loader Hydraulics in reply to J SWAN, 12-11-2007 12:45:35  
JSWAN,

I believe you are saying to remove the tube that is attached to the side plate (the one that runs directly to the remote valve, not the filter) and discard it. Attach a line (you prefer a hose, I prefer hard pipe & hose) to the fitting protruding from the side cover and run it to the input side of the loader control valve. Then attach a hose (or pipe & hose) to the fitting on the remote valve where the (now discarded) factory pipe attached and run it to the return side of the loader control valve. Excellent! Common sense and simple! Thank you, JSWAN! Anyone have any addional ideas or tips?

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