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Implement Alley Discussion Forum

Massey model 74 4 bottom plow

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03-10-2013 18:30:40

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I have a Massey Ferguson model 74 4 / 14" bottom plow, and the #4 plow will not stay up, it trips as soon as you drop it. I took it apart, and it seems the half moon anti trip mechanism has too much slop in it to keep the cam bushing low enough to put enough pressure on the plow to keep it from tripping. Anyone familiar with one of these? Can I still get parts for it, or should I just weld it?

Thanks, David

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03-11-2013 05:18:28

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 Re: Massey model 74 4 bottom plow in reply to DavidTT, 03-10-2013 18:30:40  
Hi David, Years ago we used to add a couple more
of the flat springs to what is there. In most
cases the "standard" edge wears down and we would
weld a bead to build up and grind smooth. Also in
your manual are adjustments shown to increase or
decrease the amount of tension it takes to trip.

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03-12-2013 17:48:59

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 Re: Massey model 74 4 bottom plow in reply to chuck41, 03-11-2013 05:18:28  
Thanks Chuck for the reply, I really appreciate it. You are right on the money, because it looks like somebody did just that, the welding part that is... There were 3 small weld beads o the top edge of the shank. I am thinking about either that or just putting some shear bolts through it. I finished my plowing with the 4th one off, and kinda glad I did because about an acre was pasture, not plowed in years... As a matter of fact one of the plows that trips and works like it is supposed to tripped without hitting some of that mean sand rock... lol.


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03-10-2013 19:20:50

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 Re: Massey model 74 4 bottom plow in reply to DavidTT, 03-10-2013 18:30:40  
I run an IH plow,not a Massey.You can tighten the tension a little to make it not trip so easy.Or you can put in a little bolt to keep to keep the trip 'in place'.A 5/16 bolt in the trip 'slot' will hold it.Parts should be available(they are for the IH plows).Do NOT weld it!Those trips are there for a reason!The first big rock could completely destroy your plow

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03-12-2013 17:42:35

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 Re: Massey model 74 4 bottom plow in reply to DeltaRed, 03-10-2013 19:20:50  
Thanks for the reply Delta, I really appreciate it.


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03-10-2013 19:11:37

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 Re: Massey model 74 4 bottom plow in reply to DavidTT, 03-10-2013 18:30:40  
Too many years since mine is gone to remember if that same model or not. When I got it there had been the same problem on all 4 bottoms and the shank was drilled for to put a shear bolt in, 2 of them were 5/16" and other 2 were 3/8" bolts. Used that way for several years and it would shear the bolt if it needed to trip, just carried a few extra bolts when plowing.

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03-12-2013 17:40:33

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 Re: Massey model 74 4 bottom plow in reply to Leroy, 03-10-2013 19:11:37  
Thanks for the reply, I was thinking about something like that, but was thinking about drilling the holes just in front ofthe shank to keep from having to go though so much metal.

thanks for your help

P.S. I have a 3 bottom J.D. that the middle one does the same thing! Sand rock everywhere.

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03-13-2013 09:38:34

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 Re: Massey model 74 4 bottom plow in reply to DavidTT, 03-12-2013 17:40:33  
The top corner of my beams were broke off, never thought about trying to weld them. The thing with doing like you are thinking about there would be nothing to create the shear force with tripping, it would just want to stretch and bend that bolt and not allow you to get the bolt out when it has the beam tilted just enough that it does not want to penetrate correctly. By the way mine was a semi mount 4-14" with the semi deep tillage bottoms and were hard to get parts for 25-30 years ago and I think the standard bottom would have done a nicer job of plowing, had to try to run deeper than I wanted.

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