Replacing Rasp Bars and Filler Plates

Bent rasp bars must be replaced immediately because they can cause machine damage or let unthreshed grain pass.

Rasp bars should be replaced when grooves are less than 6.35 mm (1/4 in.) deep.

Replacement rasp bars are sold in left-hand or right-hand matched sets of five.

Tighten cap screws (A) and (B) to specification.

Specification

IMPORTANT: If all rasp bars are replaced at one time, flutes on bars must be pointed in opposite directions. Dirt buildup will cause cylinder to be out of balance and must be cleaned out.

In corn, install filler plates (C) between rasp bars. These plates add efficiency to the cylinder by keeping un-shelled ears from between rasp bars. They also help deflect stones into the stone trap.

NOTE: Remove filler plates prior to operating in small grain crops to prevent cylinder imbalance. Clip nuts should be left on the cylinder heads. Removal of the clip nuts may damage the clip nuts.

A-Cap Screw
B-Cap Screw
C-Filler Plates

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