The problem is the plastic cap is bolted on with the blades, same bolt, how stupid. I see guys are 3d printing ones that lets the blade be bolted on, and the cap is bolted on over the blade and bolts.
Yarbo you can do better.
They have redesigned the cap now 2 times. The most recent one actually has metal embedded into the area where the bolt is. So you are bolting onto the metal vice the plastic.
I changed blades about a week ago, and all my bolts were loose. Bad design
Changed mine a month ago and all still tight. They didn’t even have loctite on them.
Mine did not have loctite either
Same here.
So far, my blades are still on and don’t seem to be loose. I do plan to pull the mower head here in the next few days and inspect/sharpen the blades. I’ll make sure to take pictures and report here what I find. I would estimate that I’ve probably got close to a 100 hours of run time on my unit at least, maybe more.
Ok, yesterday I removed the blades, sharpened them, then reassembled everything adding the Locktite. Gave it the full 24hrs to cure, and started running jobs again today. I’ll check the blades again next weekend and report back what I find.
How dull were they? Did they still have much of an edge to them?
The one that fell off was pretty dull, not much of an edge on either side. Maybe it had hit something that also caused it to loosen more quickly? The other one still had a bit of an edge to it, but definitely needed sharpening. This is after about a month of constant use.
I’m still tweaking my area boundaries to avoid hard brush at the edges, tree roots, etc., so I’m hoping to get more life out of the blades once I get everything dialled in.
Update: I pulled the mower twice for inspection since applying the thread lock and the blades have stayed tight with no wiggle under the cap. Another benefit seems to be that the blades have stayed sharp despite the constant use. 
That’s what I am afraid of with the current plastic mounting caps. @Yarbo-Forum this should be a recall, send the updated ones with metal to customers before more mowers get wrecked. It is a simple very cheap upgrade that needs to be done.
Did it come loose as in the bolt or is the plastic cap damaged? Get a ticket open so they can evaluate and dispatch a replacement.
Bolts where about a half turn loose, hub nut was an eighth turn loose. Was at the max setting of mowing height (4in) so not a lot of room between blades and deck. It now sounds like i need a takeoff clearance when i start the blades. Motors spin freely with no binding so i think it’s just the wind noise amplifying thru the deck .
Duct tape could help you get by temporarily. Keep the grass out from behind the deck.
When I got my Pro mower last year, it didn’t come with the caps. I didn’t know they were supposed to be there. I ran last year with no caps and no issues. the screws holding the blades were tight when I cleaned and checked the blades at the start of this season. I am running the straight blades.
I still don’t have the caps and I haven’t had any issues this year. What are the caps supposed to do? If you are bolting through the plastic cap, they are going to compress. Not any wonder that the screws are loosening.
Did not have an issue with mine coming loose and I have the original cap version. They are meant to protect the head of the bolts to keep debris and other things from impacting and deforming them or getting stuck in them.
Hex head bolts would have been a better choice than Allen screws. They would be less susceptible to damage from debris.
Yeah, most likely. Then they’d have to supply the proper tool. More money.