Toro Timemaster model 20199

[donald0039]

I have this Timemaster mower and while I think it's a great mower I cannot figure out one thing. Serial number starts with 313.

I have replaced the pulley on the blade shaft where the belt on it goes to the engine, the shaft, and the spindle.

The pulley was held tight by a locknut and under it was a cup washer and under that a flat washer.

The parts diagram did not show a flat washer so I left it off. Tightened with impact wrench.

After several hours of use the pulley was loose.

Emailed Toro but no help.

Looked at the various serial number groups and they went from a spring washer to the cup washer to a spring washer and cup washer and then back to a spring washer.

What I think is a flat washer might be a flattened spring washer but looks like a flat washer.

Trying to figure out what I should use under the nut to hold the pulley tight? When the pulley gets loose it kind of beats up the pulley. The pulley I replaced should have had a hole with two flat sides and rounded edges between the flat sides. Instead it had basically a round hole.

Annoyed that Toro would not answer my question.

 

[StarTech]

Sounds like someone sent you the wrong pulley 121-9100 spindle pulley.

One side

The other side


Yes the washer is Belleville washer which is spring type washer. Otherwords the center is raised up that is flatten as you tighten the 1/2-20 nut. And the nut is tighten to 60 ft/lbs.

 

[donald0039]

Sounds like someone sent you the wrong pulley 121-9100 spindle pulley.

One side
View attachment 72053
The other side
View attachment 72054

Yes the washer is Belleville washer which is spring type washer. Otherwords the center is raised up that is flatten as you tighten the 1/2-20 nut. And the nut is tighten to 60 ft/lbs.

That's the pulley that goes blade to blade. I am talking about the V-belt pulley on top of that mentioned in your post.

 

[StarTech]

120-3334 superseded to 130-6664

side view


top view


Bottom view

 

[donald0039]

Well I ordered 120-3334 and that's what I got. I am now concerned with what washer or washers to put under the nut to hold the pulley tight. As I said the various serial numbers groups have gone between a spring washer or cup washer or both.