On Sat, 04 Jan 2014 11:40:58 -0600, philo* wrote:

On 01/04/2014 11:30 AM, Stormin Mormon wrote:
On 1/4/2014 12:10 PM, philo wrote:

I Googled for "trommel" and found (with a smidgen of looking) there was
a factory manual for them on-line which specified the proper gear oil to
use.

Of course the OP did not supply the model number of his so I cannot
provide a link to the specific "trommel" he is using.

I must remind you that it's not fair to use
actual facts on this list.





Excellent point.

I was not trying to denigrate the OP but without giving the model number
of his equipment he has no chance of getting more than a guess for an
answer.


OP did come back and say there were no markings on the gear box.

I am pretty sure it was mentioned to him that 30 weight (though better
than nothing) is probably too light and that 80 -90 wt oil would
probably be in order.


My guess, the OP needs 90 wt gear oil. As Dufas mentioned about heat
and friction on metal gears.

OTOH: those trommels can vary /considerably/ in size.

Yep.

http://www.youtube.com/watch?v=nTg9Kv9s2aI