John Deere 420 grass gunk build up

[BTS]

I got my John Deere 420 mowing, I have mowed with it for maybe 3 hours (through out 2 days). Anyway I had to quit mowing because the belt jumped off. I got time today to remove the deck and put the belt back on. I noticed the pulleys are harder turning and the blades where scraping the underside of the deck. I picked the deck up to find it completely packed full of grass and gunk. I find this odd for the amount of mowing time I put in, I know the decks should be cleaned out quite often but this seems insane. I did all my mowing in the afternoon, everything should of been dry but anymore with our humidity, I don't know if anything dries.

Anyway, anything I can do to help prevent such bad build up so fast??? Before I put this mower deck on, I picked it up with my loader and pressurewashed it out.
Sorry the pictures aren't the best and they don't show it justice. I started scraping a little bit of gunk out and it got dark on me.

 

[BTS]

I'm guessing I lost the belt due to the mower deck being "full" and becoming overloaded. The belt seems to be in good shape which is good because I bet it's pricey!!!

 

[KennyP]

Was the deck clean before you started mowing? How tall was the grass?

 

[MH81]

Whew, that's a lot of ensilage under there

Glad the belt survived

 

[BTS]

Was the deck clean before you started mowing? How tall was the grass?

I cleaned the underside of the deck before I mounted it the first time, even pressure washed it. The first thing I mowed with it was the ditches around the wheat field which was grass 8 to 10" tall with weeds up to 2'. Maybe that was my issue? I didn't really think much of it.

 

[chieffan]

Looks like a combination of wet grass and a shallow deck, meaning short on capacity. Remember that deck is a lawn mower, not a bush hog. Mowing those conditions around your field will require frequent cleaning.

 

[KennyP]

That is probably gonna happen with that tall of grass. It has enough moisture to stick to the deck and you had it loaded pretty heavy at that depth. I would have mowed it high first to top every thing. That would get rid of about half the clippings.

 

[Propane1]

Tall weeds got lots of moisture in the stalks. Won’t be as bad the next time if you keep at it before it gets long again.

Noel.

 

[SimplyRad]

I use my Simplicity to mow weeds like that and I have to go slow and stop now and then to let the deck clean itself out but no big build up to slow it down.