Specifications

7500 SERVICING BEARINGS
55
Replacing Jackshaft Bearings
• Remove the four bolts holding the jackshaft
bearings in place. Remove old bearings and
shaft.
• Replace with new bearings and shaft. Be sure to
turn the end of the jackshaft with the longest
keyway pocket toward the Poly Chain® belt side
of the boom and make sure that the locking
collars on the bearings are facing inward.
• Bolt the new bearings and jackshaft back into
place. Just snug bolts down, do not tighten all
the way down, you will need to move the
bearings later to adjust belt tension.
• Replace the Poly Chain® guard and replace the
bolts, washers, and nuts that were removed
earlier. Tighten the bolts just enough to hold the
belt guard in place. The guard will need to slide
with adjustment of the jackshaft. You will
tighten these later.
• Place the jackshaft sprocket and tapered bushing
back onto the jackshaft. Measure the distance
from the end of the jackshaft and position the
bushing the distance measured earlier. Replace
the screws and tighten. Recheck the
measurement and torque the screws to 36 ft. lbs.
BEARING COLLARS FACING INWARD