M0290-01Model 4900
6-24 Rev. 8/19
TM
Lubrication and Maintenance
Seed Tube Guard/Inner Scraper
(Gauge wheel/seed opener disc blade removed
for easier identification of scraper)
SEED TUBE GUARD/INNER SCRAPER
Seed tube guard protects seed tube and acts as inner scraper
for seed opener disc blades.
Remove seed tube and check for wear. Excessive wear on
seed tube indicates a worn seed tube guard. Replace seed
tube guard if it measures " (1.6 cm) or less at lower end. A
new seed tube guard measures approximately " (2.2 cm).
NOTE: No till planting or planting in hard ground
conditions, especially when planter is not equipped with
no till coulters, and/or excessive blade-to-blade contact
increases seed tube guard wear and requires more
frequent inspection and/or replacement.
Remove gauge wheel and disc blade from one side of row unit.
Lift up inner scraper approximately 90° to remove from slot
when replacement is necessary.
15" SEED OPENER DISC BLADE/BEARING ASSEMBLY (CONTINUED)
REPLACE BEARING ONLY
1. Remove gauge wheel, scraper, bearing cap, cap screw, washer and disc blade/bearing assembly.
2. Remove ¼" rivets from bearing housing to expose bearing.
3.
Installing new bearing. install three evenly spaced ¼" cap screws into three of six holes in bearing housing to hold
bearing and bearing housing in place. Install rivets in other three holes. Remove ¼" cap screws and install rivets
in those three holes.
4. Reinstall disc blade/bearing assembly, washer and cap screw. Torque "-11 cap screw to 110 ft-lb (149.14 N-m).
5. Install bearing dust cap, scraper, and gauge wheel.
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