Viscosity of oil at 40°C
Temperature range
32
-25°C to 75°C
46
-15°C to 90°C
68
-5°C to 90°C
The recommended viscosity during normal working conditions is between 16 and 40cSt.
HIAB strongly recommend an oil working temperature below 70°C. If necessary consider an oil
cooler or heater.
NOTE
When working in artic condition consider an oil with lower viscosity than the 32 oil
in the table above.
Environmentally Friendly Oil
The environmentally friendly oils recommended for HIAB products are ester based synthetic
hydraulic fluids (synthetic ester).
NOTE
Vegetable oils do not meet HIAB’s requirements and must not be used.
After filling the tank
1. Operate each crane function to its end positions.
2. Operate the crane to parking position.
3. Check and top up the oil tank to max level on the tank gauge.
4. Bleed the system.
8.5.4. Bleeding air from the hydraulic system
Bleed the air from the hydraulic system:
• after changing the hydraulic oil
• after working on the hydraulic system
• if your crane works slowly or jerkily
• if your crane has not been used for a long time
WARNING
Air in the hydraulic system can lead to faults and damage
To bleed air from the hydraulic system, proceed as follows:
Move each crane cylinder and each hydraulically operated piece of add-on equipment at least
twice to its end positions (slowly).
Maintenance and Service
HIAB K-HiPro 285-425 X4
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