Doosan DX225LC-3, Руководство по ремонту

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SP002498
Page 19
Swing Device
External Load at the End of Shaft
In principle, the end of the motor shaft should be free of any
external radial or thrust load.
Hydraulic Oil and Temperature Range
1. Oil type
Generally used mineral hydraulic active oil is
recommended, but with additives of extreme pressure,
foaming preventive prevention, oxidization prevention, and
dampproofing as well as high coefficient of viscosity.
2. Optimal viscosity and temperature of Active oil (Figure 10)
The allowable viscosity range is between 10 and 1000
cSt,but 10 to 200 cSt is recommended for the optimum
efficiency.The temperature range is limited to -25°C to
100°C for the sake of the oil seal and the O-ring.
For the operation temperature, at most 60°C is
recommended taking into consideration the degradation of
active oil and seals.
1000
750
500
400
300
200
150
100
75
50
40
30
25
20
15
10
-30
-20 -10 0 10 20 30 40 50 60 70 80 90 100 110
9
8
7
6
C
F
-20 -10 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200 210 220 230
Higher Limits of Viscosity
Viscosity in cSt
Low Viscosity Limit
Optimum Working Range
Low Temperature Limit
Higher Temperature Limit
FG018906
Figure 10 Optimum Viscosity and Temperature Range