BA 9142 en 02/2015
7.2
Start-up
7.2.1
Pre-lubrication phase
Prior to each start-up, always pre-lubricate the gear unit for approx. 30 minutes by means of the oil-supply
system.
During this time rolling bearings, axial tilting pad thrust bearings and teeth for the initial start are supplied
with lubricating oil.
For gear units with high-forced lubrication it has to be noticed that the low-forced lubrication system is
started first and then the high-forced lubrication system 2 minutes later. This time is necessary to ensure
the pressure balance in the oil circuit.
Note
Start existing high-pressure pumps no later than 5 minutes before the auxiliary or main motor is started.
7.2.2
Initial start-up
•
Observe all necessary instructions.
•
Start the gear unit.
If possible, the gear unit should run for several hours on part load (50 % to 70 %). If part load is not possible,
the gear unit can also be run without load and with the rolls and/or rollers lifted. Unless faults are indicated,
the load can be increased to full load under continuous observation.
During this time, the following points have to be observed:
a)
Noise
If possible, it must be listened for unusual noises during this time on the gear unit at various points with
a suitable instrument (e. g. stethoscope).
b)
Foam formation
Is the oil in the oil reservoir (tank of oil-supply system and/or gear unit) low-foaming on the surface?
Surface foam of up to approx. 10 mm is acceptable. If there is foam, check all the suction line
connections. If necessary, also contact the oil manufacturer. With rising oil temperature, the formation
of foam reduces.
c)
Vibration measurement
(for this see section 10. "Maintenance and repair", item 10.9)
d)
Oil leakages
Monitor all screw connections in the oil lines for oil leaks and reseal them if necessary!
Note
The date of initial start-up must be notified to Siemens within 4 weeks after start-up.
