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User Guide
EM-PMI375
Maintenance
Cooling system maintenance
66 |
©
Danfoss | November 2021
For more information about the location of grease nipples and grease escape holes, see
Chapter
Connections and interfaces
Bearing relubrication:
It is normal if no grease exits the electric machine. This is because the cavities inside the
electric machine can hold a lot of grease.
1. Make sure that the electric machine has reached its operating temperature.
2. Remove the plugs from the grease escape holes.
3. Open the grease nipple plugs.
4. Use grease piston to enter specific amount of grease into the grease nipple.
5. If possible, let the electric machine run approximately one hour to let the old grease exit.
6. Install the plugs on the grease nipples and on the grease escape holes.
The electric machine cooling system requires certain regular maintenance activities.
It is recommended to change the direction of the coolant liquid flow yearly. This is done by changing the
order of the coolant connections, or changing the coolant pump direction. The reason for changing the
coolant flow direction is to prevent possible dregs (sediment) accumulating to the cooling system.
The quality of the coolant must be checked yearly. The mixture of water and glycol as well as the type of
the glycol used must be as specified. See Chapter
on page 21.
Recommended
coolants.
BC265856307805en-000202
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