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| 殼牌潤滑油系列 > 殼牌航空潤滑油 > AEROSHELL SSF AND LGF/起落架液壓油Hydraulic Fluids |
| AEROSHELL SSF AND LGF/起落架液壓油Hydraulic Fluids 詳細說明 （瀏覽1463次） |
AEROSHELL SSF AND LGF
AeroShell Shock Strut Fluid (SSF) and AeroShell Landing Gear Fluid (LGF)
are mineral hydraulic fluids (MIL-PRF-6083 and MIL-PRF-5606 respectively)
to which additional additives have been added to improve the extreme
pressure characteristics and the fluid’s natural lubricity. The lubricity agent
provides a stable thin film layer to the metal surfaces at mild operating
conditions. When severe conditions exist (landing/touchdown), the extreme
pressure additive supplies the load carrying needed at the metal-to-metal
surfaces to prevent the occurrence of such phenomena as "ladder cracking"
and "slip stiction" of the piston component of the landing gear.
AeroShell SSF is AeroShell Fluid 71 plus additives.
AeroShell LGF is AeroShell Fluid 41 plus additives.
APPLICATIONS
AeroShell SSF is recommended for all normal applications whilst the better
low temperature properties of AeroShell LGF make it particularly suitable in
areas of low temperature operations.
AeroShell SSF and AeroShell LGF are compatible with each other as well
as with AeroShell Fluids 4, 41 and 71.
AeroShell SSF and LGF are straw yellow in colour.
SPECIFICATIONS
U.S. –
British –
French –
Russian –
NATO Code –
Joint Service Designation –
Boeing Approved BMS 3-32A (AeroShell
SSF is approved to Type I and
AeroShell LGF is approved to
Type II)
McDonnell Douglas Approved DPM-6177
AeroShell SSF and LGF are not covered by any military specification.
www.shell.com/aviation
210
Hydraulic Fluids
EQUIPMENT MANUFACTURERS APPROVALS
AeroShell SSF and LGF are approved for use in the shock struts of the
following aircraft:
Boeing 707/720, 727, 737, 747 (except
those using BMS 3-11 fluids),
757, 767 and 777
Lockheed L1011 Tristar
McDonnell Douglas DC-8, DC-9, DC-10, MD-80, MD-11
Airbus CML Code 02-004A (SSF)
For use in the landing gear shock struts of other aircraft, operators must
check with the respective manufacturer first.
PROPERTIES SSF LGF
TYPICAL TYPICAL
Base hydraulic fluid specification MIL-PRF-6083F MIL-PRF-5606H
Kinematic viscosity mm
2
/s
@ 40°C 14.5 14.5
@ –40°C 560 423
@ –54°C 2640 1780
Flashpoint °C 108 110
Neutralisation Number
mgKOH/g 2.6 2.4
Evaporation %
SSF 22 hrs @ 99°C 65 –
LGF 6 hrs @ 71°C – 18.0TYPICAL TEMPERATURE/VISCOSITY CURVE
OF AEROSHELL HYDRAULIC FLUIDS
The AeroShell Book
Edition 18 2003
213
Hydraulic Fluids
www.shell.com/aviation
212
Hydraulic Fluids
PROPERTIES SSF LGF
TYPICAL TYPICAL
Relative density @ 15.6/15.6°C 0.882 0.874
Pourpoint °C –62 Below –68
Foaming
Seq I Foam/Collapse time sec 30/30 45
Seq II Foam/Collapse time sec 20/10 –
Seq III Foam/Collapse time sec 30/30 –
Corrosion – Oxidation Stability
(121°C/168 hrs)
Metal Weight Change mg/cm
2
Copper +0.002 –0.06
Aluminium 0 –0.005
Steel 0 –0.02
Magnesium +0.002 +0.01
Cadmium 0 +0.01
Fluid Properties
Change in viscosity % +15 +10.5
Change in Acid Number
mgKOH/g +0.5 +0.05
Insolubles 1.0mg/100ml Clear
4-ball wear, scar diam. mm 0.43 0.43
Colour Yellow Yellow
Table continued
4 & 41
71
31 & 61
AeroShell Fluids
3
4
5
7
10
15
25
50
100
200
500
1000
3000
10000
-40
-30
-20
-10
0
10
20
30
40
50
60
70
80
90
100
110
120
130
Kinematic viscosity: mm
2
/s
Temperature:
0
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