Description
3.7 Cooling
32 Edition 06/2022 A5850-02en
3.7.1 Fan3.7 Cooling
Principle of operation
Generally, the fan is mounted on the high-speed shaft of the gear unit and is protected from
accidental contact using an air guide cover. The fan draws in air through the protective grille
of the air guide cover and blows it along the lateral air ducts on the gear unit housing. The
fan dissipates a certain amount of heat from the housing.
Improper use can damage the gear unit. Follow the instructions given below in order to pro-
tect the gear unit against overheating:
• When you install the protective device for the coupling or similar on gear units that are
equipped with a fan, make sure that you leave sufficient clearance for cooling air to be
drawn into the fan.
The required clearance is specified in the dimension drawing in the complete documenta-
tion for the gear unit.
• Make sure that the air guide cover is correctly fastened.
• Protect the air guide cover against damage by external components.
• Make sure that there is no contact between the fan and the air guide cover.
• Note that the cooling effect can be significantly impaired if the fan is dirty or if the surface
of the housing is covered with dust or contaminants that act as an insulating layer.
Clean the fan and the gear unit. Observe the cleaning information in chapter Maintenance
and servicing work (Page88).
A fan mounted on a gear unit is illustrated in the diagram below:
Figure3-9:Fan
① Fan ② Air guide cover
Further information
You can find additional information and a detailed illustration of the gear unit and the position
of the mounted components in the dimension drawings in the complete documentation for
the gear unit.
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