Westwood T1200

[clicon357]

Managed to get the tensioner pulley all apart just now, some more chipping and scraping and back in the barrel for a final 24hr dip. It's salvageable. Bushed rather than a bearing again just like the plastic one. The bush sits in some resilient compound like on a suspension arm. A bit of zinc spray and packing with grease and it'll be good to go.

You should have seen it before it went in the acid!

 

[clicon357]

Just collected circa 50kg of crushed glass blasting medium:



Had a wander whilst waiting for it to be bagged up. Fascinating (to me anyway):

Oak?





Something from Narnia:



Something from Narnia in front of some really big pipes:



And I thought my sliding gate was big:



Bet they've lost count of how many of these done over the years:

 

[bertsmobile1]

Bad news with that pulley
The bush is not there for spinning on , it is a spacer there to make up the space between the inner race of the deep groove ball bearing and the mounting bolt.
Under the raised section you will find a deep groove ball bearing.
The pulley is made from 2 pressings ( or spinnings ) then bearing is inserted and the two halves are welded together.
Give it a blast with your new glass beads and the spot welds will become apparent.
On some of the mowers the deck idlers can go near $ 100 ( aus ) so it is a reasonable use of time to drill out the welds & replace the bearing.
Most of the aftermarket mower parts suppliers have listings of pulleys by size, so measure yours and find one that is as close to the dimensions as possible
The only ones you need to match are the major & minor diameters and the width of the working face.
All of the others don't matter as you can make a new spacer bush to get near enough to work

 

[clicon357]

@bertsmobile1 you're dead on there!

Just out of the acid and what I thought was resilient material around the bush is in fact the blown seal of the bearing. More obvious the other side where the seal is more intact. Pulley is indeed in two halves spot welded together. You can just see one of the 3 spots under the pen tip.





Off to the pillar drill to split it.

 

[clicon357]

NSK 6203DU so nothing special. The two halves will need another dip before painting.





Off to sort through the bearing box...

 

[bertsmobile1]

Just be really careful when joining the 2 halves together that the running surface is true to the inner race or the pulley will ossillate

 

[clicon357]

It was suggested this might happen. One school said gravity would overcome the potential issue. Another predicted it to a tee. So @tom3 wins tonight's star prize! ?

Little video link:

https://flic.kr/p/2j6yHjs

Seems all too familiar for some reason... ?

The Lidl gun kept clogging. Haven't drained the air tank for a while thinking about it. Really should get an inline moisture trap maybe?

When the (Lidl) gun did work with the crushed glass then the blasting effect was, imo, outstanding:

Picking up a new bearing tomorrow.

 

[bertsmobile1]

Did you cut the bottom off that bottle or did it blow out ?
The bottom must remain on the bottle.
If you go back to the previous posts you will see a mention of the bottle pressurizing which can only happen if it is closed.

 

[tom3]

This is what I use as a dryer for blasting. Fill the bucket with water and let it run enough to keep the water cold. Not fancy, but it works..

 

[clicon357]

Did you cut the bottom off that bottle or did it blow out ?
The bottom must remain on the bottle.
If you go back to the previous posts you will see a mention of the bottle pressurizing which can only happen if it is closed.

Whoops...I cut the bottom off.