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UTD.123.2019-10.00_EN
12 - Commissionning
12.1 - General
Carry out a general check, making particularly sure that
the gear reducer is filled with synthetic oil in
the correct quantity
(up to level),
with the proper viscosity and one of the brands recommended in
table 8.2
, and that it is installed in the mounting position stated on nameplate.
If an external lubricating system is present (forced lubrication, cooling unit) oil is to be filled to the correct
level with the external system full of oil.
Be sure that the safety and control devices assembled on the gear reducer and requiring electric power
supply at user’s care are active and running.
Be sure that the independent cooling units (with coil with internal heat exchanger and independen
cooling unit) are working during the gear reducer running
(see ch. 10.3).
Where Y-
Δ
starting is being used, input voltage must match the motor lower voltage (
Δ
connection).
For asynchronous three-phase motor, if the direction of rotation is not as desired, invert two phases at the
terminals.
Before running gear reducers fitted with
backstop device, make sure that the direction of rotation in
machine, gear reducer and motor all correspond correctly.
7.14).
12.2 - Running-in
For the first commissioning, before starting with a normal running cycle, it is advisable to run the gear
reducer without load in order to verify if it correctly runs.
In this circumstance, cause of the elimination of potential residual air, an oil filling up to level could be
necessary.
During the first running hours, it is important to check:
– noise level;
– vibrations;
– sealings;
If you notice any malfunctions, please refer to ch. 14.
A running-in period with gear reducer running at 50% of rated torque is suggested as follows:
– of approx. 400 _ 1 600 h for gear reducers with worm gear pairs in order to reach maximum efficiency;
– of approx. 200 _ 400 h for gear reducers with bevel and/or cylindrical gear pairs in order to reach the
best possible running conditions.
The temperature of both gear reducer and lubricant may well rise beyond normal values during running-in,
but lower than the maximum value stated on name plate. After the running-in period it may be necessary
to verify the gear reducer fixing bolt tightness.
During the first running hours it is possible to have a slight seepage of grease from the seal rings, which
will not affect the good running.
Note. Note: worm gear reducer efficiency is lower in the
first running hours
(about 50) and at every cold
starting (efficiency will be better with oil temperature increasing).
At first commissioning do all checks listed in table 14.2. The controls, for the devices of category 2,
must be repeated after 24 hours and after one week.
Check that the unit is not faulty (broken bearings, keys, shafts, etc.) or shows signs of incipient malfunction
(e.g. increased running noise/vibration, etc.).
