Mixing Aeroshell 31 and 41

[Martin S.]

Dear everybody,

about to re-fill hydraulic fluid. I bought AS41. Don‘t know exactly which brand or whether AS31 or AS41 is in my system right know. Could mixing harm?

 

Thanks a lot!

 

Martin

[PT20J]

Aeroshell 41 is standard 5606 mineral oil hydraulic fluid and is most common. Aeroshell 31 is synthetic but is listed as compatible. Both are dyed red.

[Martin S.]

Thanks a lot - that confirms what I found. Just wanted to be sure