Replacing Drill Shaft Cotter Pins and Countershaft Shear Pins

The cotter shear pins (A), which connect the drill shaft to the transmission and shear pins (B) which connect countershaft to transmission, will shear when an excessive load is put on the drill shaft.

NOTE: If drill shaft binds due to misalignment, loosen bolts on drill shaft bearings on planting units. Make certain shaft turns freely and tighten bolts.

If countershaft binds due to misalignment, loosen bolts on transmission bearings. Make certain shaft turns freely, then tighten bolts.

Infrequent or improper lubrication causes "binding" of moving parts within the planter. This "binding" will cause the cotter shear pins to shear, thus preventing breakage of planter parts.

If either cotter pin shears, turn the drill shaft by hand to locate where the binding is occurring. When the drill shaft can be turned freely by hand, replace the cotter pin.

NOTE: Replace the cotter shear pins only with cotter shear pins of the same size. Do not replace with other type pins. Extra shear pins for countershaft are located on the inside rear of the seed transmission at (C).

7200OM,4,6WM,V5 -19-24APR97-1/1