Toro 20374 self propelled-left rear drive wheel grinding.

[trooper1954]

Hi guys,
Just had this mower apart to install a new belt as the self propelled drive did not seem to be working well...runs fine now and the wheels drive, but there's an awful grinding noise coming from the rear left wheel...especially on a slight slope when thats the downhill wheel. Took the wheel off and the large gear and the drive gear seem in good shape with sharp teeth edges.....the only thing I can think of is the wheel bearing may be causing a wobble leading to them not engaging properly??
My thought is to take the same wheel off my Toro 20055 and try it....at least that will tell me if its the wheel.
Any other suggestions?
Thanks

 

[Rivets]

Wheels are not interchangeable. If the drive gear and wheel gear are in good condition, I suspect the the bearings are going. Need to replace three parts, bearing hoc, bearing and bushing. I’ve attached a site to look up the part numbers and a service manual for toro drive systems to help you out. If it came to me I would recommend that you do both sides.

Parts | Toro

www.toro.com

https://www.toro.com/getpub/22446

 

[trooper1954]

Thanks Rivets,
Just so I'm clear....the parts you refer to are 5,6,and 7 in the parts diagram??

 

[Rivets]

Yes.

 

[sgkent]

download and read. Toro drive manual. https://www.toro.com/getpub/22446

 

[trooper1954]

Just a quick question....have the new bearing for this toro 20374 rear left wheel, and wondering if the large nut on the inside of the mower allows this plate to come off so's I can get to the bearing? Or does the whole height adjustment system need to come off?
Thanks.

 

[trooper1954]

Apologies......I see now that the nut is actually the end of the retainer bushing for the bearing....at least I think so?

 

[Rivets]

There should be retainer ring holding the bearing hoc in place. This service manual should help you out. https://www.toro.com/getpub/22446

 

[trooper1954]

Thanks Rivets....having a tough time working out where the retainer ring is located....I've tried following the service manual but just not getting it. Does the whole wheel height adjustment plate have to be removed to access the bearing?

 

[trooper1954]

The bearing hoc has no snap ring....so does it just come out?