Metalfab Metatech MT-X-XXX Series Volumetric Screw Feeder - Manual (Page 6)

Wear rate is dependent on material being discharged and other factors,
including bulk density, particle size, hardness and discharge rate. Sealed
flange bearings are available as an option, these bearings typically have a
zerk style grease fitting and should be lubricated every 6 months.
2. The rear of the metering screw is supported by the bearings in the
gearbox assembly and lubricated via the gearbox oil (see #4 below). The
hollow shaft gearbox aligns and supports the shaft and retains it via a
7/16 bolt. .
3. Rear seal packing is a standard Teflon Braided Packing Rope. If any
leakage is observed, the packing pusher (bronze unit under motor mount)
should be tightened. Periodically the Teflon Rope will require
replacement, again the actual schedule being determined by type of
material and amount of use.
4. The standard speed reducer is oil lubricated and should not be re
lubricated for up to (5) years of service.
5. The Drive Motors have lifetime-lubed bearings, which give years of
service. If bearings fail, a competent motor repair shop must replace
them. Brushes on DC Drives should be checked for wear every (6)
months of continuous service.
6. When handling highly abrasive materials, the screw should be checked
periodically for wear.
7. When units are equipped with a vibrator assembly it is important that the
unit is not operated with an empty hopper as this may cause cracks
around or near the vibrator mounts or at the welded corners of the
hopper. Check welds near the vibrator periodically (6 months) for
evidence of cracks, should cracks be found, corrective action is to
determine how to prevent the vibrator from operating with an empty
hopper.
8. The trough end plates are secured with (4) nuts on studs, they are sealed
to the trough with a captured o-ring seal, ensure the o-ring cord stock is
in the groove before tightening the nuts. O-ring face seals ensure zero
leakage of dry materials at the trough ends.
9. Trough and Hopper covers are available with dust sock and vent ports for
the capture of fugitive dust and to prevent air lock while refilling the
hopper.