YP4025A-48TR20
Adjustments
81
2019-03-19
411-198M
Unit-Mount Coulter Adjustments
Coulters are not factory-installed. Check alignment
and depth prior to first use.
Coulter Depth Adjustment
The ideal operating depth for coulters is
1
/
4
inch (6 mm)
above opener depth. Although they may have originally
been set to this depth, coulter (and opener) blades wear
with time, and may need adjusting.
Adjusting the coulter depth is accomplished by
re-mounting the coulter blade in one of the six mounting
holes arranged in a staggered pattern in the coulter
bracket.
Refer to Figure 81 and Figure 82
Raise implement name and install cylinder locks before
working on coulters. Row unit may be fully lowered or
locked up. Do not attempt to move blade when the
current or new position causes it to contact the ground
during the adjustment. Be careful around the front end of
row units. Row cleaner tines and coulter blades may be
sharp.
To adjust coulter depth:
1. Determine the present opener and coulter depths.
2. Note which bracket hole the coulter is presently
using.
3. Determine which new hole will position the coulter
closer to the
1
/
4
inch-above depth. See the table
below.
4. Remove the
5
/
8
-11 x 4 inch bolt, lock washer and
nut
(in Figure 81).
5. Move the blade to the new position. Insert the bolt,
and tighten on the lock washer and nut.
6. Re-adjust row cleaners, if installed.
If a worn coulter cannot be adjusted to satisfactory
operating depth, replace coulter.
Hole
Number
Depth of (new) coulter blade relative to (new)
opener blades
1 inch (25 mm) above
5
/
8
inch (16 mm) above
1
/
4
inch (6 mm) above
0
3
/
8
inch (9.5 mm) below
3
/
4
inch (19 mm) below
Figure 81
25 Series Unit-Mounted Coulter
29124
7
Figure 82
Coulter Blade Mounting Holes
29125
1
2
5
4
3
6
