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Massey Harris & Massey Ferguson Tractors Discussion Forum
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Multi-Power vs. 8 speed for MF135?

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Bill Darte

10-12-2004 11:21:05




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I was looking at replacement tractormeters and see there is one listed for MF135 8 speed, and one for MF135 multi-power..... What is multi-power? I know mine has 4 speeds in high and low....was 8 speed (over 6 speed) an option in 1971 or was this transmission setup associated with a model/date combination?

Thanks....just learning.
bd




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megamoodairy

10-12-2004 19:50:48




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 Re: Multi-Power vs. 8 speed for MF135? in reply to Bill Darte, 10-12-2004 11:21:05  
Multi-power is the greatest two speed powershift that was ever made available on an agricultural tractor. I know that is was available up to the 300 series massey's. It shifts smoother and allows automotive like gear changes unlike the clunky unreliable IH torque amplifiers. On some days I might use the Multi-power on my Massey 1100 at least 100 times. It also has the advantage of holding you on a hill in High. The achilles heel of Multi-Power is that it free-wheels(no engine braking) in Low, which can be dangerous if your going down a hill with a heavy load and bad brakes. And if your in Low muti-power and happen to roll the tractor in the opposite direction of the gear your in with the clutch down you will unwind a spring. Which can be expensive because you have to split the tractor to replace the spring. One other problem with mutipower is on the smaller tractors that simpler hydraulic systems the multi-power can fall victim to dirty oil or poor quality oil quite easily, on the other hand I've seen massey's with several thousand hour on them and have never had a multi-power problem.

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Gerald J.

10-12-2004 18:56:52




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 Re: Multi-Power vs. 8 speed for MF135? in reply to Bill Darte, 10-12-2004 11:21:05  
Multipower works with a basic 6 speed transmission. Its hydraulically shifted, essentially the same as IH Torque Amplifier. It splits the gears. So you get 12 forward and 4 reverse. Though two of those reverse gears are probably too fast most of the time. Multipower can be shifted on the go, though when the sprag clutches wear out from that, I hear it gets expensive to fix. Its is nice to start out going down the road in multipower low, then when the engine is wound out, back off on the throttle (it free wheels in multipower low) and lift the multipower lever at 15 or 16 mph and then run it on up to 22 mph in the top gear.

Multipower also acts as a hill holder when in one range, and makes shifting difficult in high range. And it prevents pulling the tractor for starting.

Gerald J.

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