Maintenance and Service
8.5.6
Viscosity of oil
The viscosity of the oil is of great importance to
achieve high efficiency of the hydraulic system.
The naming of the oil in the table below: 32, 46
or 68 tells the viscosity of that oil at 40°C
(reference temperature).
Viscosity of oil at
Temperature range
40°C
32
-25°C to 75°C
46
-15°C to 90°C
68
-5°C to 90°C
The recommended viscosity during normal work-
ing conditions is between 16 and 40cSt.
HIAB strongly recommend an oil working tem-
perature 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 require-
ments 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.
96
Operator's Manual GB