recommend that the operators run the cone open and closed once a shift because this will
spread the grease around and allow them to see if grease is present on the screw shaft. This
is done with the press in operation.
Lubrication of the cone bushing depends a lot on what is being pressed. With orange peel,
there is enough press liquor juice acting as a lubricant that the bushing is lubricated only at
the end of the processing season (to keep it from locking up on dried-out peel juice). The
other extreme is at a paper mill where boiler fuel is made from reject fiber. There is no free
water left in the press cake, so everything is very hot and dry. We often supply a 900 psi
ATS autolube on paper mill jobs. Another tough application is with vapor tight presses
where there is apt to be solvent getting into the cone bushing. The solvent can dissolve and
wash out the grease, so we like to see frequent lubrication of the cone bushing. (Food grade
grease is used in this application since food ingredients are being produced by the press.)
The bushing holding the screw at the tailstock (Tailstock Bushing) gets greased once per
week or month. Whatever grease the customer normally uses will be fine.
The shaft seal housing may have a grease fitting. This grease is to prevent fiber from getting
into the seal. The seal should be given a shot of grease at least monthly.
The gearbox oil should be changed once a year. Use mineral oil for a normal 1,800/1,500
RPM input. Use the same grade oil, but synthetic, for input speeds of 2,400 RPM or more.
Some Nord gearboxes have an autolube canister located in the motor adapter portion of the
gearbox. It is located under a cast iron cap. This autolube should be actuated when the press
is placed in service. Nord recommends replacing this autolube once a calendar year.
The air regulator used with the discharge cone air cylinder may have a lubricant jar. If so,
Vincent includes a can of light oil along with the air regulator which comes with our screw
presses. The jar should be filled when placing the press in service and when the jar is empty,
about once a year. It takes very light (sewing machine) oil. The oil helps prevent corrosion
inside the air cylinder. (Most air cylinder manufacturers recommend against the use of
lubricators, so we no longer supply them.)
Rev. August 2020
34
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