Great Plains 25P Eliminator Bushing Field - Manual (Page 5)

Adjust Wheel to Disc Great Plains Manufacturing, Inc. 5
11/15/2010 498-255M
Adjust Wheel to Disc
Adjusting Wheel to Disc
Refer to Figure 7 and Figure 8
Hex Head Adjuster
Check tire to disc contact location. Wheel should hit disc
at bottom of tire. At top of tire it should have
3 ⁄
8
gap away
from disc. Adjust hex adjuster to obtain correct con-
tact location.
19. Move wheel arm in so side gauge wheel contacts
row unit disc at bottom. Tighten hex-head bolt to
clamp arm around bushing and shank.
Wheel and disc should touch but not be so tight
there is pressure. Pressure will cause it to bind up.
Allow for enough movement. Check wheel-to-disc
contact at 2in (5cm) planting depth. Lift wheel 2in
(5cm) and release. When let go, wheel should fall
freely.
If wheel does not contact disc at bottom to area
where blade leaves contact with soil, move hex
adjuster until wheel is angled for proper contact with
disc.
20. If wheel does not fall freely, loosen hex-head bolt
and slide wheel arm out just until wheel and arm
move freely. Retighten hex-head bolt
per grade:
1 ⁄
2
in Grade 5 bolt, 76 ft-lbs (105 N-m).
1 ⁄
2
in Grade 8 bolt, 110 ft-lbs (150 N-m).
21. Keep turning hex adjuster and moving wheel arm
until the wheel is adjusted properly. When satisfied,
tighten pivot bolt
to 110 ft-lbs.
Shims
22. If wheel does not contact blade when arm is slid into
end of bushing, then adjust the shims . Remove
shim from behind wheel to move tire closer to blade.
23. Retain removed shims by placing them on the outer
side of the gauge wheel bolt so there is always
access to them for any future adjustments.
Finish
24. Tighten the hex-head bolt .
25. Then tighten pivot bolt (roughly
1 ⁄
4
in gap at top of
wheel).
Incorrect Correct
Null4:
Figure 7
Disc/Gauge Wheel Alignment
Side Gauge
Wheel
Opener
Discs
Side Gauge
Wheel
32
36
36
25
32
28
11
U
D
F
B
L
R
34
26
Figure 8
Bushings and Guage Wheel Arm
31700
36
36
28
26
36
28