MF265 Auxillary Pump

2carlisle · Dec 1, 2015

I am installing sparex pump S.40874 1686766m91 on a 265, this is the replacement pump they use today on all the 100 and 200 series tractors for an auxiliary pump. The pump is hard to turn, I can only turn it with a pair of plyers on an old gear I put on the pump shaft. I have soaked it in UT oil no real difference. Is this pump bad or is this normal. Thanks Bill

ptfarmer · Dec 1, 2015

On new, or rebuilt hydraulic pumps they are usually a little hard to turn by hand when new. Once it gets run, and the new parts wear in a little bit (like a new engine) it will turn easier.

Dieseltech · Dec 1, 2015

I replaced one in a 265 this summer, it turned stiff too, but worked fine..

DavidP, South Wales · Dec 2, 2015

Hi, just to add a little to the above; the tightness is caused by the compression of the sealing rings on the 'figure
8' blocks inside wgich in turn presses on the gears.. It is this tightness which ensures that the pump will operate at
maximum efficiency. Yes, it will certainly loosen up a little after use. If you have a pump that is completely easy to
turn then you are likely to have problems.

DavidP, South Wales

2carlisle · Dec 2, 2015

Thanks all for the help. Bill

MF265 Auxillary Pump

2carlisle

Member

ptfarmer

Well-known Member

Dieseltech

Well-known Member

DavidP, South Wales

Well-known Member

2carlisle

Member

Similar threads