Re:Service Bulletin 48-89-T07 - Pentosin

[rawaudi@frugal.com (RWheeldon)]

Hopefully, this will clarify the discussion about Pentosin 7.1 and 11.  I
quote the subject service bulletin:

================================================================================

Hydraulic System Fluid - New Type

Hydraulic fluid has been improved as of M.Y. 1990

New:    Hydraulic fluid, P/N unchanged.  This fluid is more temperature
resistant.
              Color: Olive

Old:       Hydraulic fluid, P/N G002 000
               Color: Green

The new hydraulic fluid can be identified yb the RED cap on the container.

Note:   New and old hydraulic fluid can be mixed if necessary.

============================================================================
======

Sounds to me like Pentosin 11 can be use in a system with Pentosin 7.1 but
not the other way around.

Bob Wheeldon
'90 V8Q
Principal Engineer
Boeing Commercial Airplanes
robert a wheeldon@boeing.com
rawaudi@frugal.com