Pto ditcher - what oil for gearbox?

[jbwrangler]

I have an old Sidewinder Pto ditcher that I inherited. Inside the gearbox it has a big single chain. The oil in it is contaminated and I want to clean it out and put some fresh oil in. Problem is, the company is out of business and I don't know what type of oil to use.

Any idea wha type of oil I need to use?

Thanks

 

[DT86]

Every gear box I have gets 90w Gear Oil.

 

[jbwrangler]

Every gear box I have gets 90w Gear Oil.

Thanks. It is more of a chain case I guess. Te bottom part of the chain is bathed in oil. I figured it was just gear oil, but wanted to make sure.

Now, what is the best way to clean out the case? It looks like a milkshake right now.

 

[DT86]

I would fill it completely with diesel fuel, let it set a while, flush and repeat.