Elmo ST-800M Belt Replacement

[Jason Ewing]

As you folks know from my bulb thread I recently pulled my families old projector out of storage.

The bulb is replaced and that part now works. However I need to replace the belts. The takeup belt is completely disintegrated into black goo, but the main drive belt seems to have survived. Either they were made of different material or it was replaced at some point. I've just ordered belts from the ebay link suggested. But it looks like I need to remove the pulleys and clean them thoroughly first.

Does anyone have a photo or insturctions of how to route the new belts when they arrive?

Photo's of the "goo":

[Jason Ewing]

[Steve Klare]

Hi Jason,

Congratulations!

-you have now joined the Greats of Goo!

-respect on doing it on a workbench instead of a tablecloth (-if only I'd thought of that!)

This is the first part, changing the Motor Belt:

ST-800 Motor Belt

Here we change the long belt, back to the take-up arm:

ST-800 Long Belt

(These are out of the Index of Technical Topics at the top of the 8mm Section.)

The motor belts seem to weather time better than the long belts, but given enough time...

This is my own belt-goo trophy picture:
.

[Jason Ewing]

Thanks Steve for the detailed write up!

Any recommendation on type of grease to use on the pulleys & gears? I'd like to completely clean and service them awhile it is apart. Lots of goo everywhere.

[Steve Klare]

Hi Jason,

I used lots of Q-Tips, paper towels and rubbing alcohol in my goo-cleanup.
(-plus that tablecloth, as things turned out!)

A forum member who did professional projector repair (-since retired) recommended Super-Lube

Lubricating Projectors

According to a poster in this thread, this lube is available at Home Depot in Canada.

[Jason Ewing]

I think I have some of that in my shop!