Lost my .... Bottom ... OK need a little plow help

Barry75

Member
Well all was going along so smoothly, with the 1370 and the old 5-18" Case plow that hadn't been in service since around '92. Every now and then I'd hit a rock, a bottom would trip, I'd back up to reset, and away we'd go again.

Then things got more interesting. Going right along and suddenly heard the big girl grunt a little and just as I reached for the clutch I heard "ping" and looked around to see 5/8" bolts flying through the air and bottom #3 laying behind the plow. Dang!!

Well I think I just proved that I need to look over the trip mechanisms on this old 7000 series plow. I have a manual for it, but not any drawings or parts diagrams and the manual simply says to turn the adjusting screws to set trip point. The plow is model 7258 (7000 series, 2 for trip rather than shear bolt, 5 for bottoms, 8 for 18" bottoms).

As mentioned, the plow has sat still for 23 years now. Other than backing off the screw on #3 bottom (and probably same on 1 and 5, both 2 and 4 have tripped a few times but that's it), what can I do to ensure the trips are working right? Does anybody have a diagram of the trip mechanism? Is there a good way to safely disassemble the spring loaded mechanism? Definitely want to lube everything and make sure it works well before continuing. I have about 75 acres more to go and don't care to repeat this exercise, or lose my bottom again, ha!
a191117.jpg

a191118.jpg
 
I would get an aerosol can of roller chain lube and drench all the trip mechanisms. I have a 4 bottom version of that plow.
 
I had a 5 16/18 7000 trip plow that I bought new in 1974. Never could get the trips set right and ended up doing some damage. I was so tired of it I wanted Case to take it back but they wouldn't. Not very long after my little "consultation" with the company man, Case came out with a program to change it over to hydraulic reset for I believe $150 per bottom if I remember right, a lot of money for me to spend in the late 70's. Ended up being the best money I ever spent. I was told the ergonomics were changed when Case went to a higher clearance plow and the trips couldn't handle it.
 
Just because you have enough power to pull that plow in road gear, doesn't mean you should. :)

Kinda my fear about my newly acquired 1370. Hardest pulling thing I have here is a 5-16 Massey plow.
 
Thanks Ron and Jon, I'll do that, soak and lube everything really well, and try to back off the adjustment screws a bit, see if that frees things up.
 
I think I can pick up a 5-16" with hydraulic reset pretty cheap. Might be looking into that before long if the trips are still a big problem after this.
 
Haha, true! But, I am only pulling around 3.5-4 mph. I hear of guys pulling them around 5 mph but that just seems really fast to me. My ground has a lot of clay hard packed by a couple decades of no-till before I got it, so it is a bit rough going.
 
If it is the trips I'm thinking of they seize easy if not greased and set outside. Loosen the spring and see if you can move the cast piece sticking out the back side( it should move downwards). If it won't move the cast piece is seized onto a bushing that is supposed to be greaseable. There is a 1/2 inch (I think) bolt that holds the cast piece in place.Take it out and see if you can get the cast piece out. If you can you will more than likely have to press out the bushing, clean it reassemble and grease it. I did the same to all the bottoms on one of my plows and they work fine. Also make sure the lower bolt it is supposed to pivot on is free, you may have to loosen and lube. It takes time to do this but will pay off. They are a decent setup but years of setting will seize everything!!! Even a shear-bolt plow will seize too. Paul
 
Thanks Paul, that makes a lot of sense. I know which cast piece you are talking about, and it does have a grease zerk on it. I think what I was worried about was relieving the spring pressure first so nothing snaps back on me when working on it. I'll carefully back out the adjustment screw and start taking things apart. Appreciate the advice.
 

We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today.

Back
Top