Grain Systems Bucket Elevtors, Conveyors, Series II Sweeps PNEG-1128 - Manual (Page 18)

5. Management and Maintenance
18 PNEG-1128 Chain Loop System without Controls
Chain and Paddles
Check for proper chain tension. Open the inspection door at the inspection corner and check chain tension
by pulling the bottom edge of a paddle by hand. The paddle tip should not move more than 3/4" when the
chain is properly tensioned.
(See Page 29.)
The Chain Loop chain has connecting links spaced every 10'. Check these links to make sure that they
are securely fastened and that the cotter pins are bent back correctly.
(See Figure 6M on Page 30.)
Check the lock nuts used to fasten the paddles to the chain brackets. They should be tightened to a torque
specification of 20 ft. lbs. (2.8 KG-M or 26 N-M).
Adjust the chain tension by loosening the locking jam nuts on the adjusting screw and turning the screw
to move the inspection corner sprocket. Turning the adjusting screw clockwise will tighten the chain and
turning it counterclockwise will loosen the chain. Remove chain links if there is not enough travel in the
adjusting screw to tighten the chain. Adjust each side equally to keep the sprocket shaft square with the
corner housing.
(See Figure 6N on Page 31.)
Spray a light coating of oil on the chain after a season of use.
Corner Shaft Bearings
The bearings for the corner sprockets are sealed bearings and require only a small amount of
multi-purpose grease every 50 hours. Check bearings for wear and that the locking collars are secure.
Corner Sprockets
Inspect the condition of corner sprockets for teeth wear and that they are centrally aligned in each of the
corner housings.