Model 20055 Blade driver has no key but drive shaft from engine has keyway?

[trooper1954]

Just replaced the belt on the above model, and noticed when I took all apart that the blade driver has no protrusion inside to fit the key way on the drive shaft.
Just wondering if its sheared as I see no evidence of there having been one ....perhaps this is why it's not self propelling?
Should the blade driver have a raised area that fits in the key way? It seemed to mow fine but no propulsion.
Thanks.

 

[Tiger Small Engine]

Just replaced the belt on the above model, and noticed when I took all apart that the blade driver has no protrusion inside to fit the key way on the drive shaft.
Just wondering if its sheared as I see no evidence of there having been one ....perhaps this is why it's not self propelling?
Should the blade driver have a raised area that fits in the key way? It seemed to mow fine but no propulsion.
Thanks.

If there is a keyway, there should be a key. The pulley on crankshaft should be separate from the blade adapter, therefore has nothing to do with mower not self propelling.

 

[StarTech]

If there is a keyway, there should be a key. The pulley on crankshaft should be separate from the blade adapter, therefore has nothing to do with mower not self propelling.

Tiger does this looks there is separate pulley? I am fairly it welded as an one piece item.

and there is suppose to be key. You can see one on the right center side of this image

 

[Rivets]

Star hit it on the head, but I have seen those key ways shear off.

 

[StarTech]

Star hit it on the head, but I have seen those key ways shear off.

And Yes I have too. Haven't seen one a couple years but I just don't get walk behinds in like I didn't. I even seen a few riders with manual PTOs to have sheared keys mainly because someone didn't torque the retainer to spec. Walk behinds with bar blades are more prone to shearing due to blade impacts.

 

[trooper1954]

Thanks Guys...Star Tech .....you're right....mine looks exactly like the photo where the pulley is one piece with the blade driver.
I guess I'll be ordering a new one
I just thought there'd be at least some evidence on the inside face if there had been one.

 

[trooper1954]

FYI....just came from the Toro dealer.....this blade driver has a driver spacer installed in the bottom....the little key is situated below the spacer which is why I couldn't see it. It is not designed to go into the keyway....this blade driver is friction fit.....