TM
Model 4900M0290-01
Rev. 8/19 4-9
Fertilizer
TM
Check knife to disc blade clearance and adjust if necessary as described below.
Knife must be adjusted such that the leading edge is tight to the disc blade to keep soil and residue from wedging
between them. Knife pitch is also critical to performance. Knife to disc blade gap has been factory preset at ",
measured at top rear of knife. Refer to right side illustration above.
Loosen or tighten /" mounting hardware to adjust knife’s entire leading edge to be tight against disc blade from top to
bottom. Refer to left side illustration above. Turn disc blade and check for slight drag without freewheeling. Readjust
knife tension to accommodate blade high-spots as needed.
Refer to right side illustration above. If knife pitch is such that the gap is less than " (measured at top rear of knife),
residue and soil may wedge between knife and disc blade, causing resistance to disc blade rotation. If knife is pitched
such that the gap exceeds " (measured at top rear), accelerated knife/drop tube wear will result.
After knife adjustment, adjust top end of
liquid drop tube accordingly to ensure
adequate clearance to opener mount and
gauge wheel through the entire range of
motion for the openers.
NOTICE
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