Proper Hydraulic fluid for flaps and brakes

[Greg Ellis]

I have a 63 C model.  They share the same fluid for both the flaps and the brakes.  What is the correct fluid?  I have and have used MIL-PRF-5606H but I cannot seem to find that exact one now.  I have found MIL-PRF-5606J and 5606A but no H.  Are they all compatible and which is the correct one for my 63 C model?

Thanks in advance for any help.

[Greg Ellis]

Let me add, I just noticed that Aeroshell Fluid 41 is 5606H but which one is correct or are they all compatible?  My 5606H is Phillips and they don't seem to have it anymore.

Thanks.

[EricJ]

The latest rev of the 5606 spec is fine.

If you ever flush the entire system, there are new synthetic replacements that last longer.