Exxon HyJet™ IV-A plus

HyJet IV-A plus



 

 Exxon HyJet IV-A plus is a fire-resistant phosphate ester hydraulic fluid designed for use in commercial aircraft. It is the best-performing Type IV fluid and approaches to a great extent many of the performance capabilities of Type V fluids, including high temperature stability, long fluid life, low density, and rust protection.
It is superior to all other Type IV fluids in these respects.
Exxon HyJet IV-A plus meets the specifications of all major aircraft manufacturers and SAE AS1241

To learn more, download the HyJet IV-A plus fact sheet >> 

Exxon HyJet IV-A plus offers the following key features and benefits:
 

FeaturesAdvantages and Potential Benefits
Best in high temperature stability among Type IV fluidsLonger fluid life.
Lesser need to replace fluid due to degradation.
Reduced hydraulic system maintenance costs
Lowest density Type IV fluidReduced weight of the hydraulic fluid carried by aircraft.
Reduced aircraft fuel consumption, lower operating costs
Effective rust protectionReduced the risk of equipment damage in the event of major water contamination
Excellent low temperature flow (viscosity) propertiesPrecise hydraulic system control and response even during extended range/polar flights.
Longer equipment life
Excellent deposit controlLonger equipment life.
Reduced maintenance costs
Excellent protection against electro-chemical corrosion (erosion)Protection against servo valve and pump damage
Approved by all major aircraft manufacturersUse as fleet lubricant by airline operators
Fully compatible with all approved phosphate ester hydraulic fluidsFlexibility in use by airline operators

 

Applications

Exxon HyJet IV-A plus fire-resistant aviation hydraulic fluid is used in commercial aircraft hydraulic systems where phosphate hydraulic fluids are recommended. It is compatible in all proportions with commercial Type IV and Type V phosphate ester aviation hydraulic fluids.

Exxon HyJet IV-A plus meets or exceeds the following industry and aircraft builder specifications. It is approved against all commercial aircraft manufacturer requirements and is included in their Qualified Products Lists.

Specifications and Approvals
 

HyJet IV-A plusMeets Type lV, Low desnsityIs in Qualified products List
SAE Aerospace Standard AS1241CXNot Applicable
Airbus NSA307110NXX
ATR NSA307110NXX
Boeing BMS 3-11P, Type IV, Class 1 and Type V, Grade B and Grade C  XX
Boeing (Douglas Division) DMS 2014HXX
British Aerospace (Avro) BAC.M.333CXX
Bombardier/Canadair BAMS 564-003AXX
Bombardier/DeHavillandXX
CessnaXX
EmbraerXX
FokkerXX
Gulfstream Aerospace 1159SCH302JXX
Lockheed C-34-1224CXX

 

Typical Properties
 

 Test MethodHyJet IV-A plus (1)Limits
Kinematic Viscosity, cStASTM D 445  
at -53.9ºC (-65ºF) 13202000 max
at -26.1ºC (-15ºF) 130135 max
at 37.8ºC (100ºF) 10.610.0 -11.0
at 98.9ºC (210ºF) 3.63.35 - 3.75
at 127.6ºC (260ºF) 2.61.5 min
Viscosity IndexASTM D 2270280 
Shear Stability, % Viscosity Drop at 40ºCASTM D 562122 
Pour Point, ºC (ºF)ASTM D 97‹-62 (-80)-62 (-80) max
Specific Gravity at 25ºC/25ºC (77ºF/77ºF)ASTM D 40520.9960.990 -1.002
Density at 15.6ºC (60ºF), g/mL (lb/gal)ASTM D 40520.999 (8.35) 
Acid Number, mg KOH/gASTM D 9740.040.1 max
Water, Karl Fischer, mass %ASTM D 63040.10.2 max
Flammability   
Flash Point, ºC (ºF)ASTM D 92176 (349)160 (320) min
Fire Point, ºC (ºF)ASTM D 92188 (370)177 (350) min
Autoignition Point, ºC (ºF)ASTM D 2155›427 (800)400 (752) min
Foaming Tendency/Stability, mL foam/sec to collapseASTM D 892  
Sequence I 27/15250/100 max
Sequence Il 23/13150/50 max
Sequence Ill 28/16450/250 max
Particle Count, NAS 1638 ClassAuto Counter47 max
Chemical Elements, ppm   
Calcium 103120 max
Potassium 3848 max
Chlorine 1050 max
Sodium 115 max
Sulfur 224350 max
Four-Ball Wear, Scar diameter at 75ºC/600rpm/1hour, mmModified ASTM D 4172   
4 kg 0.220.45 max
10 kg 0.330.50 max
40 kg 0.730.55 – 0.85
Electrical Conductivity at 20ºC, microSiemens/cm 1.4 0.5 min 
Bulk Modulus, Isothermal secant at 100ºF/3000 psi, psi 210,000 
Thermal Conductivity at 40ºC, cal/sec/cm2/ºC (Btu/hr/ft2/ºF) 33x10^-5 (0.0799)  
Coefficient of Thermal Expansion, 25 to 100ºC, per ºC (per ºF) 0.00086 (0.00048) 
Specific Heat Capacity at 40 ºC, cal/g/ºC (same as Btu/lb/ºF) 0.41 

 

(1) Values may vary within modest ranges

 
Features and Benefits

Exxon HyJet IV-A plus offers the following key features and benefits:
 

FeaturesAdvantages and Potential Benefits
Best in high temperature stability among Type IV fluidsLonger fluid life.
Lesser need to replace fluid due to degradation.
Reduced hydraulic system maintenance costs
Lowest density Type IV fluidReduced weight of the hydraulic fluid carried by aircraft.
Reduced aircraft fuel consumption, lower operating costs
Effective rust protectionReduced the risk of equipment damage in the event of major water contamination
Excellent low temperature flow (viscosity) propertiesPrecise hydraulic system control and response even during extended range/polar flights.
Longer equipment life
Excellent deposit controlLonger equipment life.
Reduced maintenance costs
Excellent protection against electro-chemical corrosion (erosion)Protection against servo valve and pump damage
Approved by all major aircraft manufacturersUse as fleet lubricant by airline operators
Fully compatible with all approved phosphate ester hydraulic fluidsFlexibility in use by airline operators

 

Applications

Applications

Exxon HyJet IV-A plus fire-resistant aviation hydraulic fluid is used in commercial aircraft hydraulic systems where phosphate hydraulic fluids are recommended. It is compatible in all proportions with commercial Type IV and Type V phosphate ester aviation hydraulic fluids.

Exxon HyJet IV-A plus meets or exceeds the following industry and aircraft builder specifications. It is approved against all commercial aircraft manufacturer requirements and is included in their Qualified Products Lists.

Specs

Specifications and Approvals
 

HyJet IV-A plusMeets Type lV, Low desnsityIs in Qualified products List
SAE Aerospace Standard AS1241CXNot Applicable
Airbus NSA307110NXX
ATR NSA307110NXX
Boeing BMS 3-11P, Type IV, Class 1 and Type V, Grade B and Grade C  XX
Boeing (Douglas Division) DMS 2014HXX
British Aerospace (Avro) BAC.M.333CXX
Bombardier/Canadair BAMS 564-003AXX
Bombardier/DeHavillandXX
CessnaXX
EmbraerXX
FokkerXX
Gulfstream Aerospace 1159SCH302JXX
Lockheed C-34-1224CXX

 

Tech Details

Typical Properties
 

 Test MethodHyJet IV-A plus (1)Limits
Kinematic Viscosity, cStASTM D 445  
at -53.9ºC (-65ºF) 13202000 max
at -26.1ºC (-15ºF) 130135 max
at 37.8ºC (100ºF) 10.610.0 -11.0
at 98.9ºC (210ºF) 3.63.35 - 3.75
at 127.6ºC (260ºF) 2.61.5 min
Viscosity IndexASTM D 2270280 
Shear Stability, % Viscosity Drop at 40ºCASTM D 562122 
Pour Point, ºC (ºF)ASTM D 97‹-62 (-80)-62 (-80) max
Specific Gravity at 25ºC/25ºC (77ºF/77ºF)ASTM D 40520.9960.990 -1.002
Density at 15.6ºC (60ºF), g/mL (lb/gal)ASTM D 40520.999 (8.35) 
Acid Number, mg KOH/gASTM D 9740.040.1 max
Water, Karl Fischer, mass %ASTM D 63040.10.2 max
Flammability   
Flash Point, ºC (ºF)ASTM D 92176 (349)160 (320) min
Fire Point, ºC (ºF)ASTM D 92188 (370)177 (350) min
Autoignition Point, ºC (ºF)ASTM D 2155›427 (800)400 (752) min
Foaming Tendency/Stability, mL foam/sec to collapseASTM D 892  
Sequence I 27/15250/100 max
Sequence Il 23/13150/50 max
Sequence Ill 28/16450/250 max
Particle Count, NAS 1638 ClassAuto Counter47 max
Chemical Elements, ppm   
Calcium 103120 max
Potassium 3848 max
Chlorine 1050 max
Sodium 115 max
Sulfur 224350 max
Four-Ball Wear, Scar diameter at 75ºC/600rpm/1hour, mmModified ASTM D 4172   
4 kg 0.220.45 max
10 kg 0.330.50 max
40 kg 0.730.55 – 0.85
Electrical Conductivity at 20ºC, microSiemens/cm 1.4 0.5 min 
Bulk Modulus, Isothermal secant at 100ºF/3000 psi, psi 210,000 
Thermal Conductivity at 40ºC, cal/sec/cm2/ºC (Btu/hr/ft2/ºF) 33x10^-5 (0.0799)  
Coefficient of Thermal Expansion, 25 to 100ºC, per ºC (per ºF) 0.00086 (0.00048) 
Specific Heat Capacity at 40 ºC, cal/g/ºC (same as Btu/lb/ºF) 0.41 

 

(1) Values may vary within modest ranges

FAQs
Frequently asked questions about aviation products
Find answers to the most commonly asked questions about ExxonMobil Aviation products and services.
Where to buy tool
Aviation where to buy tool for lubricants and fuels
Learn more about where to buy ExxonMobil Aviation fuels and lubricants.
Tech topics
Jet engine
Gain the best understanding of our products and the applications they support.
Exxcare
EXXCARE fluid analysis test tubes
Our hydraulic fluid analysis can help detect problems before they become critical and costly.