Great Plains 2020P Operator Manual - Manual (Page 59)

4/23/2010 118-740M
57 Maintenance and Lubrication
Grommet Maintenance
Periodically check seed meter and seed box
grommets for weathering or cracking and replace
as necessary. Check sliding seed tubes at this
time to make sure they slide freely.
Drive System
Refer to Figure 67
For proper operation and to prevent downtime and
repair, keep drive chains properly adjusted and lu-
bricated. Regularly check drive chains for excess
slack and wear. Adjust idlers to remove any ex-
cess slack from chains.
NOTE: Be sure chain is installed with the
chain connector link retainer towards the cen-
terline and the clip opening (split end) is
facing the opposite way of the chain travel.
See figure A page 54.
20 Series Opener Side Wheels
Refer to Figure 68
1. Lift opener side wheel off the ground. Move
tire in and out to check for end play. Check for
roughness in bearing by rotating wheel. If the
bearings are rough, inspect and replace if
necessary.
2. Check for the correct number of flat washers
(1) and machine washer (8) between the side
gauge wheel (2) and the wheel arm (3). There
must be three flat washers (1) and one ma-
chine washer (8) between the wheel bearing
and arm with the machine washer (8) next to
the arm. There should be three flat washers
(1) and one lock washer (9) on the outside of
the wheel. When installed, the wheel should
turn freely and not hit the arm at the curve. Do
not add any more washers than necessary.
3. Disassemble side-gauge-wheel arm from
unit. Remove bushing (4) from sleeve (5) and
check bushing for wear. Replace bushing if
necessary.
4. When reinstalling side gauge wheels, align
tab on hex adjustment (6) with notch in bush-
ing. Replace bolt and tighten.
5. To prevent plugging loosen clamp bolt (7) and
slide arm inward to take up gap between side
wheel and disk blade.
6. Adjust side gauge wheels. Refer to “Adjust-
ments,” page 28.
18265
Figure 67
Drive Chains and Idlers
18266
20432
Figure 68
Side Wheels