Edition 2 Chapter 1 Page 1-27
Feb/2013 Maintenance and Service
Table 1-3 Hydraulic Oil Performance and Type
Item
Ambient
Temperature
Above 104° F
(40° C)
Ambient
Temperature
-4° F - 104° F
(-20° C - 40° C)
Ambient
Temperature-
22° F - -4° F
(-30° C - -20° C)
Ambient
Temperature
Below -22° F
(-30° C)
Reference standard GB11118.1-94 GB11118.1-94 GB11118.1-94 SH 0358-95
Type L-HM L-HV L-HS
Aviation
hydraulic oil
Viscosity grade 68 32 22 10
Min. flash point
(split) ° F (° C)
356 (180) 320 (160) 284 (140) 198 (92)
Kinematic viscosity at
104° F in²/s
(40° C mm²/s)
61.2-74.8 28.8-35.2 19.8-24.2
More than 10
at 50° C
Max. temperature
when kinematic
viscosity at
59 in²/s ° F
(1500 mm²/s ° C)
-0.4 (-18) -22 (-30) -58 (-50)
Min. viscosity index 95 130 130
Max. pour point (° C) 15.8 (-9) -27 (-33) -49 (-45)