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8.3
Lubrication
All head and tail pulley bearings are pre-greased at the factory. These bearings should be field
greased periodically. Lubrication frequency may vary; dry, dusty applications may warrant
weekly greasing, while less harsh applications may need greasing only once or twice a year. Do
not exceed 10,000 hours of operation between re-greasing.
If there is a gear reducer supplied with your weighfeeder, it has an initial break-in period. After
the first 250 hours of operation, the gear box(es) should be drained and refilled to the proper
level(s). Subsequent oil changes should be done every 2500 hours. See the gear reducer
manual for further details.
If there is a gear motor (motor and reducer all in one housing) supplied with your unit, it is
permanently lubricated. No lubrication is necessary.
8.4
Weighfeeder storage recommendations
If a weighfeeder will be stored for a period of three months or more, follow the guidelines below.
8.4.1
Load cell care
The load cell shipping bolt(s) should be installed whenever the weighfeeder is moved as an
extra safety measure during the storage period. Do not forget to remove the shipping bolt(s)
upon re-installation.
8.4.2
Gear reducer
Uncouple the gear reducer from the weighfeeder drive shaft and the motor and grease all shaft
surfaces liberally with an appropriate lubricant to help with reassembly.
In addition, fill the gear reducer with an appropriate gear oil to prevent oxidation. When the
equipment is re-installed, completely drain this gear oil and then refill the reducer to the
appropriate level.
8.4.3
Electrical
To prevent oxidation, place a desiccant or moisture removal material in all electrical junction
boxes and component cabinets. This includes the load cell junction box, the integrator cabinet,
and the motor speed controller enclosure (if present).
SITRANS WW300
Operating Instructions, 05/2015, A5E33560691-AB
Maintenance
8.3 Lubrication
29
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