The basic procedure is to push or pull the screw out of the gearbox. If the screw is not tight,
the screw is removed easiest by pulling, or by prying with a pry bar.
Alternatively, the screw can be removed by constructing a gear puller, allowing the use of a
hydraulic jack, combined with a cross bar and two long shafts threaded into the gearbox
housing. The holes in the gearbox have metric threads. To avoid the need for metric all-
thread rod, a length of all-thread rod with English threads is welded to the head of a metric
bolt.
If the press has been badly jammed, the key may have rolled inside its pocket. In these cases,
it can be impossible to press the screw from the gearbox. It then becomes necessary to cut
the screw in half, between the Adapter Plate and the A-plate. The stub shaft can then be
bored out in a large boring mill, and the screw can be repaired at the Vincent factory.
When reinstalling a screw, the screw must be pulled in until the step in the shaft seats against
the thrust bearing of the gearbox. This will position the flights of the screw so as not to hit
the resistor teeth. Be careful when guiding this step in the shaft through the shaft seals.
During re-assembly of a keyed shaft, be sure to apply Never-Seez or anti-seize to the portion
of the screw shaft that goes into the gearbox.
When pulling a screw into the press it may become necessary to use a long allthread rod
(English threads). This rod is screwed into the threaded hole on the end of the screw. The
screw is slid into the press far enough that the allthread rod goes through the hollow bore of
the gearbox. A large washer is slid along the allthread rod to form a brace against the
gearbox. Running a nut on the rod, against this large washer, will pull the screw into the
gearbox.
There are two ways to avoid excessive rubbing between a new screw and the screen: Either a
shim (or shims) can be placed between the screen flange(s) and the resistor bar(s), or the
interference can be ground off the edge of the screw. To eliminate the high spots, coat the
edge of the screw with Prussian Blue, tighten the assembly, turn the screw, remove the
screen, and then grind the screw where interference has occurred.
Lubrication
Lubrication is something we generally review with customer personnel during start-up. It is
straight forward:
Cone Bushing: Once a shift
Tailstock Bushing: Weekly
Shaft Seal: Monthly
Gearbox: Annually
Motor: Never
The most critical lubrication item has to do with the cone bushing. Before starting up a new
press, the cone should be run in and out a few times to spread the grease around. We
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