Great Plains ADC2250 Operator Manual - Manual (Page 39)

37
Section 3 Adjustments
7/28/10 Model 2250 Air Drill Cart 167-033M
Great Plains Mfg., Inc.
Drive System Adjustment
Chain from Hub to Main Jackshaft
Check the chain slack. Chain should have 1/4” - 3/8” slack
at the midpoint of the span. Adjust the tension as needed
by loosening the bearing support bolts and sliding shaft
forward or rearward, see Figure 3-10.
Check tension on the chain from the jackshaft to the clutch
if any adjustments are made.
Drive Chain from Main Jackshaft to Clutch
1.
Make sure both sprockets are aligned. If they are not,
loosen the set screws holding the drive sprocket in
place and move the sprocket over until they are
aligned. Re-tighten the set screws.
2. Check the tension. Rear span of the chain should
have 1/4” slack at the midpoint - do not overtighten, re-
fer to Figure 3-11. Loosen bolts holding the clutch
shaft bearings and slide the shaft up or down to ad-
just. Tighten bolts. Be sure clutch shaft is kept parallel
with the main jackshaft.
Drive Chain from Gearbox Jackshaft to Gearbox
Check the tension. The rear span should have 3/8” slack
at the midpoint, refer to Figure 3-13. Loosen the bolts
holding the shaft bearings and move in slots to adjust. Re-
tighten the bolts.
Chain from Hub to Main Jackshaft
Figure 3-10
14916
Clutch Input Chain Adjustment
Figure 3-11
14885
NOTE: The electric clutch anti-rotation tang must be
a loose fit over the stop bolt. If the clutch shaft is
moved to adjust the chain tension be sure to check
the stop bolt. The stop bolt can be moved in its slot to
ensure a loose fit or to get greater chain adjustment
if needed. It is very important that the bolt is not tight
against either end of the slot in the clutch tang to en-
sure long clutch life, refer to Figure 3-12
14855
Clutch Anti-rotation Tang and Stop Bolt
Figure 3-12
Loose fit
Gearbox Input Chain Adjustment
Figure 3-13
14870