Product Description

Mobil HyJet IV-Aplus 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, density, and rust protection. It is superior to all other Type IV fluids in these respects. Mobil HyJet IV-A plus meets the specifications of all major aircraft manufacturers and SAE AS1241.

 

Features and Benefits

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

 

Features

Advantages and Potential Benefits

Best in high temperature stability among Type IV fluids

Longer fluid life.

Lesser need to replace fluid due to degradation.

Reduced hydraulic system maintenance costs

Lowest density Type IV fluid

Reduced weight of the hydraulic fluid carried by aircraft.

Reduced aircraft fuel consumption, lower operating costs

Effective rust protection

Reduced the risk of equipment damage in the event of major water contamination

Excellent low temperature flow (viscosity) properties

Precise hydraulic system control and response even during extended range/polar flights.

Longer equipment life

Excellent deposit control

Longer equipment life.

Reduced maintenance costs

Excellent protection against electro-chemical corrosion (erosion)

Protection against servo valve and pump damage

Approved by all major aircraft manufacturers

Use as fleet lubricant by airline operators

Fully compatible with all approved phosphate ester hydraulic fluids

Flexibility in use by airline operators

 

Applications

Mobil 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.

Mobil 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

This product has the following approvals:

AIRBUSNSA307110N – Type IV, Low Density

BOMBARDIERBAMS 564-003A – Type IV, Low Density

CESSNA, Type IV

EMBRAERType IV, Low Density

FOKKERType IV, Low Density

GULFSTREAM1159SCH302J – Type IV, Low Density

LOCKHEEDC-34-1224C – Type IV, Low Density

ATRType IV, Low Density

BOEINGBMS 3-11P – Type V, Grade B and Grade C

BOEINGBMS 3-11P – Type IV, Low Density

Boeing-Long BeachDMS2014H – Type 4

BAE/AVROBAC.M.333C – Type IV, Low Density

 

This product meets or exceeds the requirements of:

SAEAS1241D, Type IV, Class 1 (low density)

 

Properties and Specifications

Property

Acid Number, mgKOH/g, ASTM D974

0.04

Autoignition Temperature, F, ASTM D2155

800

Bulk Modulus, Isothermal secant at 100 F/3000 psi, psi, ASTM D6793

210000

Calcium, ppm, ICPES

103

Chlorine, ppm, XRF

10

Coefficient of Thermal Expansion, 25 to 100 C, per degree C, API MPMS 11.1

0.00086

Conductivity @ 20 C, MicS/cm, ASTM D2624

1.4

Density @ 60 F, lb/USg, ASTM D4052

8.35

Fire Point, Cleveland Open Cup, °F, ASTM D92

370

Flash Point, Cleveland Open Cup, °F, ASTM D92

349

Foam, Sequence I, Collapse Time, s, ASTM D892

15

Foam, Sequence II, Collapse Time, s, ASTM D892

13

Foam, Sequence III, Collapse Time, s, ASTM D892

16

Four-Ball Wear Test, Scar Diameter, 10 kg, 600 rpm, 1 h, 75 C, mm, ASTM D4172 (mod)

0.33

Four-Ball Wear Test, Scar Diameter, 4 kg, 600 rpm, 1 h, 75 C, mm, ASTM D4172 (mod)

0.22

Four-Ball Wear Test, Scar Diameter, 40 kg, 600 rpm, 1 h, 75 C, mm, ASTM D4172 (mod)

0.73

Kinematic Viscosity @ 100 F, mm2/s, ASTM D445

10.6

Kinematic Viscosity @ 127.6 C, mm2/s, ASTM D445

2.6

Kinematic Viscosity @ -15 F, mm2/s, ASTM D445

130

Kinematic Viscosity @ 210 F, mm2/s, ASTM D445

3.6

Kinematic Viscosity @ -65 F, mm2/s, ASTM D445

1320

Potassium, ppm, ICPES/AA

38

Shear Stability, % Kinematic Viscosity Loss, 40 C, %, ASTM D5621

22

Sodium, ppm, ICPES

1

Specific Gravity, 25 C/25 C, ASTM D4052

0.996

Specific Heat Capacity, cal/g-deg.C, Reference

0.41

Sulfur, ppm, ICPES/XRF

224

Thermal Conductivity at 40 C, cal/cm-sec-deg.C, Reference

0.00033

Viscosity Index, ASTM D2270

280

Water Content, mass%, ASTM D6304

0.1

Foam, Sequence I, Tendency, ml, ASTM D892

27

Foam, Sequence II, Tendency, ml, ASTM D892

23

Foam, Sequence III, Tendency, ml, ASTM D892

28

Pour Point, °F, ASTM D97 / ASTM D5950

-80

NAS 1638 Class, HIAC, ISO 11500

7

 

Health and safety

Health and Safety recommendations for this product can be found on the Material Safety Data Sheet (MSDS) @ http://www.msds.exxonmobil.com/psims/psims.aspx

Remark

It cannot be guaranteed that the product information given above is up to date. For the latest version of the Product Data Sheet we refer to the product library of ExxonMobil.