Specifications

3500D SERVICING BELTS
51
Replacing Poly Chain® Belt
• Check belt alignment using a straight edge.
Adjust belt alignment by loosening one
jackshaft bearing jam bolt and tightening the
other bearings jam bolt. Make only slight
adjustments and recheck alignment. The
alignment and tension of the V-belt will
also need to be checked after changing
and adjusting the Poly Chain® belt.
• To tighten the belt more if needed, loosen
the front bolts and tighten each of the back
jam bolts the same number of revolutions, to
keep the alignment true. Make only slight
adjustments at a time and recheck tension;
repeat as necessary until tension is correct.
Then once the belt is adjusted, tighten the
front bolts against the bearing. Recheck belt
alignment after tightening all bolts and nuts
to make sure the belt is sill aligned.
• Use this same procedure to tighten loose
belts.
• DO NOT OVER TIGHTEN BELT;
OVERLY TIGHT BELTS WILL CAUSE
BEARING AND ENGINE DAMAGE. To
loosen the tension on a belt, loosen the jam
bolt and tighten the bolt on the other side of
the bearing. Always make slight, equal
adjustments on both bearings and recheck
tension.
• Replace belts when worn or when repeated
adjustments are necessary. Belts should
never get so loose that all of the adjustment
capability is used.