yes, that's for a grease fitting........i ripped mine out the other day before i realized you can adjust the grease fitting tip.....the threads seem smaller than any other replacement zerk i have......
you'll be simply amazed how much smoother it runs when you replace the blades........mine shakes when i lose one.......
be sure to order extra pins and, i call them horse shoes......i've lost several of both when i get in to heavy rocks, hit a stump, etc......and losing them will shut your job down......don't forget extra blades......buy a few more than what it takes replace what is missing......
my idler pulley was jumping around a LOT when i brought it up to pto speed...i inspected the belt and it looked absolutely fine.....but i put a new belt and spring on it and the jumping went away.....i wish i had an extra belt, now.....some times in very heavy vines, briars, etc it will wrap around the drum and bring it to a halt, smoking the belt.....i'm sure it can only take that a few times and i don't want to have any down time, i love my flail over my bush hog (both have their dis/advantages)......i can't find the belt at any local supply even the industrial places...
i ordered flailmaster's box of cotter keys.......they aren't what they have pictured in the book.....their's is the next size smaller in diameter and too long (they get ripped out easily when their too long)........a neighbor brought me a short, fatter style that fit the hole in the pin better.........
i try to grease mine alot because, like your's, it looks like it may have a million hours on it.......there is one on each end, of the main large bearings, the one you have missing, one next to that for the idler and one down by the gearbox in the driveshaft tube....you have to roll the drum around to get to it....there's no bearing or anything, it's just a driveshaft coupler that connect the solid drivshaft to the output shaft of the gearbox......the one behind the the pulley is way back in there and hard to find the first couple of times and if dirt is built up, it's hard to see...
well, that's more than you wanted to know!
Thanks for all the advice, I am sold on the heavy blades. So now the next question after looking at flail master (thank you
) is the HD, Extreme svc, or the forged blades. and what sets the forged apart? If the forged is the best blade I don't mind spending the money. What I am cutting is a mix of honeysuckle, wild raspberry, buckthorn, prickly ash, and some light grass on fire lanes (stumps and rocks will be an issue). I got the mower used its not pretty to look at, but it did exceed my expectations. With 22 blades missing, it is out of balance, so I have only made 2 test runs with it. Flatheadyoungin on your 88 on the belt end of the gear box shaft I have a hole that looks like it might be for a grease fitting?(3rd pic) Thanks again for the help