Duratech HAYBUSTER 107C DRILL, Operating Instructions And Parts Manual

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22 7 7 C / 1 0 7 C D R I L L S O P E R A T I N G I N S T R U C T I O N S
4.5 Haybuster 77C/107C Drill Opener
The 77C/107C Drill uses a coulter-disk offset opener. The coulter blade leads the disk by 1-1/2”. Both blades are the
same size and due to the offset, there is some sliding action where the blades contact. This sliding or scissor action
provides excellent residue cutting action at ground level, especially in wet residue. The scissor action causes some
wear into the coulter blade at the point of contact. This wear is normal and the heavier coulter blade is bolted to the
bearing cage to allow easy replacement.
One complete turn changes points A and B (DWG. 1) the amount shown in DWG. 2. It takes 6 turns to bring points A
and B back together.
depth adjustment washer for
serial numbers 401 and up
4.5A Control Plates
Control plates are mounted using a spring, bolt, guide tube, washers and nut assemblies. The two outer and center
assemblies use a larger washer, guide tube, washer, bolt and top locknut. When installing these assemblies, tighten
the bolt until the guide tube is tight against the tank. The remaining assemblies use a spring, washers, bolt and a top
locknut. On these remaining assemblies, the springs should be tightened to 1-1/16” - 1-1/8”.
control plate
remaining bolt assemblies
outer bolt assemby