4780 0318
remove retaining ring stop. Turn retaining ring clockwise until there is little or no play. Reinsert the stop and
screw. Do not over-tighten. The drive chain and drive sprocket must be removed to adjust the bearing on the
chain case side. If adjusting does not remove the play from the bearing, it must be replaced.
TO REMOVE THE MAIN SHAFT BEARINGS:
Remove the top shield, side guards, and conveyor belt assemblies.
Remove the chain case cover.
Loosen the motor jam nut and take up bolt.
Loosen the motor mount bolts and slide back the motor to loosen the drive chain.
Remove drive chain.
Remove large drive sprocket.
Loosen the setscrews on the cast iron conveyor belt sprocket that is farthest away from the chain case - the
left side.
Clean the paint off of the inner/left side of the main shaft and move the left side cast iron conveyor belt
sprocket toward the center of the main shaft.
Remove the left/outer-retaining ring, which holds the cartridge bearing in its sleeve.
Pull the main shaft away from the chain case so that the left bearing slides out of its sleeve and can be
taken off of the shaft.
Remove the right inner retaining ring and push the cartridge bearing out of its sleeve.
If the cartridge bearing is locked into place, a bearing puller can be purchased to help remove the bearing.
TOP SHAFT
TOP SHAFT SPROCKETS Make a visual inspection of the sprockets for wear. If the sprocket tooth is worn
down half of its original thickness, it should be replaced. There is no adjustment to be made on the
sprockets.
TOP SHAFT BEARINGS The top shaft bearings are take-up bearings. Clean off any debris or excess grease
and visually inspect for wear or damage. Use a pry bar to check for wear pushing on the bar to inspect for
movement. If there is no movement, clean and grease. If the bearing or sprockets are visibly damaged or
have movement, they must be replaced.
TO REMOVE THE TOP SHAFT: Remove the top shield. Loosen up the four 1/2" wing nuts (518AA) that
secure the top shield to the side shields. Remove the top shield assembly by lifting it off the side shields.
REMOVE SIDE SHIELDS Remove the three 5/16” bolts that hold the side shields onto the frame.
REMOVE DRIVE CHAIN Remove the two ½” wing nuts that secure the chain case cover to the chain case.
Remove the chain case cover. Position the connecting link midway between the large and small drive
sprockets. Remove the connecting link and the drive chain.
REMOVE CONVEYOR BELT There is an overlap at the ends of the conveyor belt rubber belting. The
overlap is under one of the rows of springs. The belt must be disconnected at this overlapped row. To find
the overlap, look inside the belt while turning it. The channel on the inside of the belt will partially hide the
ends of the rubber belting, but the end of the belting will be visible. When it is found, the overlapped row
should be positioned one row up from the rear bottom sprockets.
The top shaft is a sliding/take up shaft. It is used for tensioning and loosening the conveyor belt. By
loosening the take up bolts, the top shaft will lower and the conveyor belt will loosen. Loosen the take up
bolts until the conveyor belt stops lowering (1 1/8” socket with one 12” and one 6” extension). Loosen both
sides completely.
The conveyor belt must be clamped to prevent it from rolling off/down when all fasteners and chains from the
overlapped row are removed. Clamp each side using a c-clamp type vice grip or similar clamps. Remove
the row of tines that covers the overlap by removing the 3/8” bolts/nuts that secure the channels-backing
strips-retaining bars (9/16” socket with 6” extension & 9/16” box wrench).
Remove the cotter pin and connecting pin from the chains. If the chains are worn out and being replaced,
they can be torched apart.
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