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General Instructions
GI-6126J12-01
GI-17
a low temperature. It reflects the minimum environmental temperature where gear oils are
used.
c)
Resistance to wear: it is the ability of gear oils to keep oil films free of damage. Such ability
is particularly important to gear oils.
2)
Brand and specification of gear oils
Standards comparable to API (American Petroleum Institute) standards are adopted in China,
i.e. gear oils are divided into general vehicle gear oils (SH0350-92), medium-duty vehicle gear oils
(GL-4) and heavy-duty vehicle gear oils (GL-5).
a)
General vehicle gear oils (SH0350-92) have three viscosity designations, i.e. 80W/90,
85W/90 and 90.
b)
Medium-duty vehicle gear oils (GL-4) normally include five viscosity designations, i.e. 75W,
80W/90, 90 and 85W/140.
c)
Heavy-duty vehicle gear oils (GL-5) (GB13895—92) are applicable to gear transmissions
and hyperbolic gear transmissions in various rough working conditions like high-speed
impact loads and low-speed high torsion. They include the 75W, 80W/90, 85W/90, 85W/140,
90 and 140 viscosity designations.
3)
Selection of vehicle gear oils
a)
The varieties and grades of gear oils are selected according to the load of gear transmission.
Heavy-duty vehicle gear oils must be adopted in case the surface contact pressure of
gears exceeds 3,000Mpa; sliding speed reaches 10m/s and working temperature of oils
reach 120 to 130
℃
. For instance, the lubricating oils of driving axles of hyperbolic
gears of imported cars and engineering trucks.
Medium-duty vehicle gear oils may be adopted in case the surface contact pressure of
gears is below 3,000Mpa; sliding speed is below 10m/s and working conditions are not
severely rough. For instance, medium-duty vehicle gear oils may be adopted for the rear
driving axle of Dongfeng EQ1090 trucks even if it is driven by hyperbolic gears because
the load is not particularly heavy.
General vehicle gear oils are normally adopted for general helical gears if the load is
light. For instance, general vehicle gear oils may be adopted for rear driving axle of
Jiefang CA1091.
b)
Choose the designation of viscosity of gear oils according to the climatic conditions where
the vehicle is used.
5W, 80W and 85W correspond to the minimum applicable temperatures of -40
℃
, -26
℃
and -12
℃
respectively. Choose them with reference to the minimum temperature where
the vehicle is used.
90# gear oils can be adopted under normal circumstances. #140 gear oils may be
adopted in a highly hot region and for heavily loaded trucks.
Hydraulic oils
1)
Working conditions and main characteristics of hydraulic oils
A hydraulic system is installed for dump trucks, automobile cranes, loaders and various types of
engineering machineries and the working medium is hydraulic oil. The working conditions of
hydraulic oils require that the oils must have sound shearing stability, wear resistance, oxidation
stability and fluidity. Most importantly, their incompressibility must be guaranteed. The factor that
influences the incompressibility of hydraulic oils most is their solubility of air. If the air solubility is
too high at a certain temperature and pressure but would become lower in some other working
conditions, air bubbles may be created in the hydraulic oils. The compressibility of air bubbles will
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Страница 130: ...PP 4 Propeller shaft 1 传动轴 Drive shaft 2 六角螺栓 Hex bolt 3 螺母 Nut 4 弹垫 Spring washer 5 万向节总成 Universal joint assy 3 4 ...
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Страница 259: ...REPAIR MANUAL ZF DROP CENTER AXLE AV 132 II AV 132 II T 5871 214 102 en 5 1 ...
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Страница 344: ...SU 4 Suspension System ECAS Electric control system WABCO Bus ECAS operation manual 6 4 ...
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Страница 454: ...BR 50 Brake System BR 6125J93C 01 2 General schematic diagram of brake system 8 50 ...
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Страница 519: ...Appendix 2 Pressure Valve Upper Lid 2019 12 17 CATL Confidential Page 9 Outer side Inner side ...
Страница 535: ...2019 12 17 CATL Confidential Page 25 Introduction of Battery Management System BMS Chapter 3 ...
Страница 537: ...3 2 Electrical Schematic Diagram Example 2019 12 17 CATL Confidential Page 27 ...
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Страница 603: ...GOLDEN DRAGON 电源 故障 火警 负极 电源 故障 火警 正极 18 32VDC 负极 进风口 11 27 ...
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