Maintenance
Replacing feed chain gear sprocket set screw
Maintenance
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5-8
5
3.
Move the adjustment sprocket to take any slack out of the chain, and then retighten the
sprocket nut.
5.8
Replacing feed chain gear sprocket set screw
The feed roller sprockets in the MP260 are equipped with set screws that are designed to
shear off their heads when the feed system is overloaded. For example, if the size of the
material being fed into the machine is more than the machine can handle, the feed roller
sprocket set screw will break off to protect the feed motor and drive train of the machine.
See Figure 5-9.
Use a 4 mm hex wrench to remove set screws.
If sheared, remove these set screws and reinstall new set screws in the feed roller
sprocket (the set screw heads must enter the cutouts for them located in the shaft).
NOTE:
If the sprocket rotated on the shaft, it must be removed and
re-aligned. Use a common automotive gear puller for this purpose.
Ensure that you do not place the gear puller arms behind any of the
sprocket/gear teeth, possibly bending or damaging them.
During the assembly process, a rust preventing varnish was applied to
the feed sprocket and the feed roller shaft. Before replacing the feed
sprocket, it is recommended that this varnish be removed to assist
reassembly. Use emery cloth to lightly polish and remove the varnish
that is on/around the shaft. Lightly polish and remove the varnish that
is on the inside of the hole in the feed sprocket/gear. After this has
been done, place the feed sprocket on the shaft. Pay close attention to
FIG. 5-9
Sprocket set screws
