first your two roll in their compartment,run under the little plate before exiting and then going thru the two tension aid springs and then both thru the 1st porcelain,then divide for each porcelain on needle and go tie at base of needle and then engage manually for tiyng knot and then rotate whole system by hand by turning the flywheel.
Gidday, I am self-taught on the 503, but after threading the needle, I pass the twine straight up through the gap in the knotting mechanism, against the thingy with the multiple serrated discs, then tie it back to the bale density adjuster at the back. After the first bale it will cut the twine then you can remove the remaining bit of twine with the knot you tied.
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