User Manual

402-382M Table of Contents Index 2012-08-23
8 Swath Command™ Table of Contents Index Great Plains Manufacturing, Inc.
Replace Electric Clutches
Depending on planter model and drive type, there are
two or three electric clutch assemblies that are replaced
with a simple sprocket. Due to their electrical load, these
cannot be left connected to the system harness, and
without electrical control, would leave the drive system
disabled.
Refer to Figure 3
(which depicts a clutch on a hydraulic drive 3PYP planter)
These clutches are generally present at shaft ends,
and may be secured on their shaft by set screw lock
collars , roll pins, or both. Older assemblies may lack
the oil shield depicted at right.
10. Locate all the electric clutches on the planter.
11. Unplug the lead at each clutch.
Update one clutch at a time.
12. Measure from any convenient reference point to the
center-line of a clutch output sprocket (along the
shaft). Make a record of this location. The
replacement sprocket provided needs to align with
the drive chain , and must be at this same
position on the shaft (installed at step 18).
13. At the end of the shaft where you plan to remove a
clutch, examine any components mounted
between the clutch and shaft end (and there may be
none).
Note: Check your Parts manual to ensure that you know
how these go back together.
14. Loosen or release spring on idlers (not shown) on
chain .
Roll Pin Damage Risk:
If any roll pins need to be removed, drive them out carefully
and save them. The kits do not include replacement roll pins.
15. Remove and save all components (except bearings,
if possible), between shaft end, up to and including
the outside clutch collar or roll pin (not shown).
Loosen bearings and/or brackets as needed to free
shaft end. If may be necessary to free the other end
of the shaft and slide it clear of the clutch. Take note
of, and save, any removed components.
16. Lift chain off clutch output sprocket . Remove
the clutch assembly. It is not necessary to remove
the sprocket, spacer and oil shield from the clutch.
None of these parts are reused.
17. Remove the bushing and key . These are not
reused.
18. Select one new:
808-309C SPKT 50C25 X 7/8 HEX BORE
This is a plain 25 tooth sprocket with a
7
⁄
8
inch
hexagonal bore. It is stamped “25” on each side.
19. Slide sprocket loosely onto the drive shaft. Loop
the chain over the sprocket.
20. Add one saved:
402-025S LOCK COLLAR, 7/8 HEX W/ SET SC
Slide it loosely onto the shaft.
21. As needed, reposition the shaft, bearings and
brackets to its original placement.
22. Adjust the new sprocket to the position
recorded at step 12. Secure in place with collar
(or original roll pin) and the inside collar .
23. Reinstall any end-of-shaft components removed at
step 15.
24. Engage idlers to set chain to recommended
slack. (See “Chain Maintenance” in the 403-857M
Operator manual).
25. Repeat step 12 through step 24 for each clutch.
16
27
15
24
12
1
28
13
2
256
Figure 3
Typical Electric Clutch
25060
27
15
16
24
12
1
12
15
12 24
13 28
256
256
12
15
256
15
2
12