Great Plains Yield-Pro 1625 Planter 2004 - Manual (Page 4)

402-188M 12/12/2005
Great Plains Mfg., Inc.
Base Update 2005 Kit 4
Replace Idlers
Refer to Figure 4
1. Detach meter from opener and set meter aside.
NOTE: It is not necessary to detach hose
from meter.
2. Detach spring from idler bracket weldment. Re-
move snap ring (4) from front idler (10). NOTE: It
is not necessary to remove both snap rings.
Discard snap ring (4). Keep spring for reuse.
NOTE: If meter drive units have been timed for
staggered drop on twin row spaced planters, do
not remove drive chain from sprocket without
first noting which sprocket tooth is up. Check
that sprocket is timed with same tooth up when
chain is reinstalled or re-time meters when fin-
ished according to the instructions in operator’s
manual.
3. On backside of drive mount weldment (2), re-
move bolt (6) and washer (8) securing idler pivot
(3) and idler bracket weldment (1) to drive mount
weldment (2). Keep bolt (6) and washer (8) for
reuse.
4. Remove idlers (5 and 10), bushings (7 and 9),
idler bracket weldment (1), and idler pivot (3).
Discard idlers (5 and 10), bushings (7 and 9),
idler bracket weldment (1), and idler pivot (3).
5. Turn sprocket by hand for two rotations. Insert
meter drive adapter tool into hub of sprocket.
NOTE: To test torque, remove chain from
sprocket. Complete test with parts at tem-
peratures of 65 degrees or higher. Using 5/8"
socket and an inch-lb torque wrench, measure
drive torque by rotating sprocket in normal direc-
tion of travel.
NOTE: Meter drive units with torque readings in
excess of 10 inch-lbs should be replaced. Units
with torque variation, as sprocket is rotated,
greater than 3 inch-lbs should be replaced. Or-
der assmebly 403-117s, one per row as needed.
NOTE: It is not necessary to completely remove
chain from row unit while replacing idlers.
6. Secure idler pivot (3) and bushing (9) to drive
mount weldment using bolt (6) and washer (8)
removed in step 2.
NOTE: DO NOT apply any lubricant or anti-sieze
compounds to these parts when reassembling.
7. Attach idler bracket weldment (1) to idler pivot
(3). Route chain through idlers (5 and 10) as
idlers (5 and 10) are reassembled.
23405
Figure 4
Idler Assembly
23406
8. Place idlers (5 and 10) on idler bracket weld-
ment. Secure idlers (5 and 10 ) to idler bracket
weldment (1) with snap rings (4).
9. Reattach spring to idler bracket weldment (1)
and replace meter.
10. Repeat steps 1-9 for all other openers.
11. Check meter timing on twin row spaced planters.