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Hi. As the other says, the Multipower is freewheling in low, and when you drive forward and downhill. If I am right, it freewheels in high too, if you are backing up a hill and over the top and downhill again. It is a very handy option, but finaly the clutch wears out and have to be replaced. Well, about the hydraulic pump, it has a low capacity, it also depend some on the years. If you have an old MF 165 it will have the Mark 2 pump, but if a very new MF 165 it may have the Mark 3 pump. They are not interchangable. Both gives little oil out, but plenty of pressure. The Mark 3 pump I think give a little more oil, so a loader will be a little faster. Also, the first MF 165 with multipower had a single multipower pump, located on top of the regular hydraulic pump, and gear driven. On some newer 100 series tractors, they changed to dual multipower pumps. One of the pumps delivered oil to the multipower clutch, and the other pump was connected to one of the inspetion covers on the side of the centerhousing. The oil from this pump could then be directed through a one way valve to a loader spool valve, and the oil from the regular hydr. pump to the 3 point linkage could be directed through a second one way valve and into the same loader spool valve. This way both pumps fed the loader and could speed it up considerably. I have also heard about some of the old MF 165 that had a single multipower pump and also a pressure devider valve that gave the needed pressure to the multipower and the oil that was not needed went to the outlet to be used as the forementioned loader spool vale. The reason some has warned you against the multipower is most likely that if you have bad brakes, and drive downhill there will be no engine braking. And therefor dangerous. But with good brakes, it is no need to be worried.
Bill
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