GREAT PLAINS YP1630F-1630, Operator'S Manual, Page: 91 / 142

YP1630F-1630 and YP1630F-1670 Table of Contents Index Maintenance and Lubrication
Great Plains | 401-832M | 2018-07-31 Table of Contents Index 87
Install Sunflower Finger Set
Refer to Figure 92
14. Select the finger set from the conversion kit.
Sunflower fingers have short square “flags” at the
ends of the fingers, compared to corn finger sets,
which have longer rounded flags.
Place the finger set on the meter shaft. Rotating the
finger set and shaft as needed, seat the finger set
fully against the back plate. There should be no air
gap between the hub rim and the backing plate.
The shaft cross-pin seats in deep detents in the
finger set hub. The bearing housing has a
rectangular notch
that engages a rectangular tab
projection in the finger set.

If the finger set does not seat fully, this is usually
because the notch and projection are not mated.
Rotate the finger set clockwise until you feel two
clicks. The fingers should dip into the seed drop exit
port, then lift, without catching on the backing plate.
15. Select the nut from step 8. Spin it onto the shaft. Do
not tighten at this step.
Set Finger Set Torque
Refer to Figure 93
16. Loosen the nut .
Press the finger set hub firmly against the back plate,
checking that it is fully seated and has no wobble.
Turn the nut until it contacts the finger set hub (this is
the nut position shown as a dashed hexagon in the
upper right illustration).
Tighten the nut by
1 
2
to
3 
4
of a nut “flat” (this is
the nut position shown as a solid hexagon). This
equals about 0.45 N-m (4 inch-pounds) of torque on
the nut.
Refer to Figure 92
17. Place the nut cover on the shaft, making sure to
align it so that the shaft pin hole is not obscured by a
castellation.
18. Insert the cotter pin , but do not secure it.
19. Verify that the finger set turns with a slight amount of
resistance, and that the fingers operate correctly.
Every finger flag must be closed between 8:00 and
2:00 o’clock, and open between 2:00 and 8:00.
20. Secure the cotter pin.
21. Reinstall the meter cover (page 85). Reinstall the
meter (page 57).
Figure 92
Install Sunflower Finger Set
34530
34532
1
2
4
6
7
8
5
3
1
2 3
4
5
Figure 93
Set Torque
34534
34533
Field Results and Equipment Damage Risks:
Set the nut torque only as specified. If the
nut is too loose, doubles result during
seeding. If the nut is too tight, it creates
excess drag on the drive system, and the
finger set hub wears out prematurely.
6
7
8