Edition 2 Chapter 1 Page 1-28
Feb/2013 Maintenance and Service
1.15 GEAR OIL
A. Always use the correct gear oil (type and viscosity) in the crane.
B. When the crane comes out of the factory, the gear oil level is full. You must use
the data from Table 1-4 when you choose the type of oil for the crane.
Table 1-4 Gear Oil Performance
Kinematic viscosity at
212° F (100 °C)
mm²/s
Minimum flash
point (split)
° F (° C)
Ingredients
56.3 (13.5) ~<24.0
329 (165)
Organic acid fat, phosphoric acid
fat, silicic acid fat, fluorin oil, silicon
oil, polyphenylene oxide +
Figure 1-18 Changing Intervals
When there is contamination in the gear oil, change the oil immediately.
Monitor the oil level regularly and add oil if it is below the low mark.
You cannot mix oil of different brands (specifications) or types.
Always use the correct oil based on the temperature the crane operates in.
If you use the incorrect oil (type or viscosity) in the reducer mechanism,
you can damage it.