AeroShell Fluid 4 Aviation Hydraulic Fluid

Aeroshell Fluid 4 Aviation Hydraulic Oil Meeting MIL-H-5606A Specification

Aeroshell Fluid 4 is being discontinued and replaced by Aeroshell Fluid 41

AeroShell Fluid 4 is a mineral-based hydraulic oil with low temperature characteristics that is capable of operating over a wide range of temperatures. This fluid is oxidation inhibited and contains a special anti-wear additive. It is dyed red for identification and leak detection purposes. It also has the following benefits: 

• Superior low temperature properties 
• Compatibility with synthetic rubber components 
• Dyed red for easy identification 
• Good anti-wear properties 

Applications 

• Aircraft applications where a MIL-L-5606A fluid is specified or recommended 
• Hydraulic oil systems, particularly those that are subject to a wide variation in ambient operating temperatures 
• Winter service for bucket trucks and other portable equipment subject to severe low temperature operation 
• Should not be used in aviation applications that call for a MIL-H-5606G type fluid 

Specifications 

• MIL-H-5606A* (obsolete) 
• DEF STAN 91-048 Grade Normal* 

* AeroShell grade meets the requirements of the listed specification but is not necessarily fully approved to that specification.