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Discussion Starter #1
Been fixing up an old 609. After rebuilding the gearbox, my output seal started leaking (with the help of some barbed wire). Looking at the parts diagram, it seems there’s supposed to be a shield on them. Anyone confirm how it’s attached? Welded to the deck or what? Thinking about fabbing one up.
 

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Discussion Starter #3
Id' just fill the corn head grease or some tube grease and keep rolling.. I'll look at my 709 tomorrow and see if there's one on mine.
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I’d sure appreciate it. Been thinking about the cornhead grease. Years ago I had a summer job bushhogging for the highway dept. Every morning we’d pump grease in the gearboxes. Don’t remember what type, but the gearboxes held up to 8-10 hrs a day every day.
 

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I've had Cornhead lube in my JD 709 rotary cutter for several yrs. The guard you inquired about is shown to only fit model 709

PS: I'm not trying to ruffle any feathers or cause any ripples on the pond BUT Bushhog is a trademark brand name not associated with John Deere.
 

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I've had Cornhead lube in my JD 709 rotary cutter for several yrs. The guard you inquired about is shown to only fit model 709 although I can't envision why it wouldn't fit smaller rotary mowers.

PS: I'm not trying to ruffle any feathers or cause any ripples on the pond BUT Bushhog is a trademark brand name not associated with John Deere.
 

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Discussion Starter #6
I've had Cornhead lube in my JD 709 rotary cutter for several yrs. The guard you inquired about is shown to only fit model 709 although I can't envision why it wouldn't fit smaller rotary mowers.

PS: I'm not trying to ruffle any feathers or cause any ripples on the pond BUT Bushhog is a trademark brand name not associated with John Deere.
Jim, how much do you put in it? Seems some people fill it completely, but I saw one post that said 90%. On their “rotary cutter” 😁
 

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I've had Cornhead lube in my JD 709 rotary cutter for several yrs. The guard you inquired about is shown to only fit model 709 although I can't envision why it wouldn't fit smaller rotary mowers.

PS: I'm not trying to ruffle any feathers or cause any ripples on the pond BUT Bushhog is a trademark brand name not associated with John Deere.

I agree.... The correct slang term is brush hog. The correct technical term is rotary cutter.

Dave
 

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I have one of the three gearboxes on my 10ft brush hog leaking and also the gearbox on my post hole digger. I just pump them full of gun grease. I even maintain a separate grease gun with cheap grease just for that purpose. You can usually even put some 80w-90 gear oil in after you have pumped in some gun grease.

Dave
 

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I ran 80-90 til I noticed it leaking. Now I’m running 140. Slowed it down, but it’s still leaking.
 

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No help on the guard but in regards to lubricant in the gear box you guys should try NLGI 00 viscosity grease. Its a grease at room temperature but once it heats up just a little it turns into an oil. Supposed to work great at not leaking out of gearboxes with worn seals. You can find “00” grease at Tractor supply. Its fairly inexpensive. I have also run regular chasis grease in my bush hog but I only run it for a few hrs a year. Extended use may wear it more? Anyways thought I would pass on that tip about the grease.
 
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