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Massey Harris & Massey Ferguson Tractors Discussion Forum
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Twin-Power. How does it work?

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I Bleed Green

06-30-2004 18:58:28




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Yep i'm a John Deere guy, but igot talking withsome guys about MH Twin-Power. I got to drive a 101JR maybe 25 years ago. It had a (B) mark along with the gear numbers. The man who owned the tractor told me that was Twin-Power. If you put the gear shift lever in B opened the governor for more belt power and speed. Someone told me the throttle opened the governor up and that was the Twin-Power.

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Alberta Mike

07-01-2004 06:38:34




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 Re: Twin-Power. How does it work? in reply to I Bleed Green, 06-30-2004 18:58:28  
Funny thing is that I have seen some Masseys with twin-power decals that said twin power but they weren't. If you have a twin power, there is a little cast iron activating lever that is mounted on the side of the front shift rail housing that is mounted on the front right of the transmission case. This lever is linked by a long 1/4" rod that goes all the way forward directly to a steel cam that pivots on the side of the governor. This is NOT the regular throttle/governor control linkage that Masseys and all other tractors usually have. When you shift the Massey into 4th (road) gear or into the B (belt) position on the shifting platform, one of those shift rails inside the housing I mentioned moves that control lever forward (I think it goes forward, can't remember for sure). The long rod then also moves and the cam at the governor also moves, somehow bypassing the regular governor control for engine RPM setting that would be in effect for normal use in 1st, 2nd, 3rd, and reverse gears. I could never really figure out how movement of this cam bypasses regular engine RPM settings. So in effect, you can have higher engine RPM's for road travel in 4th gear or for belt work in "B" position. It was pretty much a "no cost" feature that Massey used to sell tractors I guess. You could get the higher RPM's out of the throttle by moving the throttle lever to the raised notches on the throttle control quadrant near the steering wheel if you were in 4th or B belt position. Both of my Juniors had the feature, the first one was missing the long rod and the cam, the second one had it in place. Most were missing on other Massey tractors I've seen. That long rod seems to get in the way a lot and most farmers probably discarded it (along with the tractor's side panels).

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Bob

07-01-2004 16:56:35




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 Re: Re: Twin-Power. How does it work? in reply to Alberta Mike, 07-01-2004 06:38:34  
Early Twin Powers were set up the way you described. Late ones simply had 2 stops on the throttle.



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Boss Hog

07-01-2004 05:15:43




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 Re: Twin-Power. How does it work? in reply to I Bleed Green, 06-30-2004 18:58:28  
My understanding is that twin power was just a sales gimmick. All it amounted to ws another stop on the throttle.

The first throttle stop was for regular field work. The 2nd one was supposed to be for belt work.

Of course - You could just pull the throttle down to the 2nd stop when you were in the field also.



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