VII-MMIX
Page 22
4.0 MAIN DRIVE, SPROCKETS AND CHAINS.
4.1
Observe chain for proper seating on sprocket – use caution while Bale Wagon is
operational. Observe for jerking as chain wraps around sprocket. Loud noise or hard
jerking indicates:
Misalignment of chain and sprocket. Realign.
Worn or loose chain. Replace worn chain.
Loose chain idlers. Reposition and tighten idler.
Bent shafts in sprockets. Replace with new shafts.
Beater is possibly bent. Replace beaters.
4.2
Observe sprocket tooth wear pattern
Tooth worn on sides indicates misalignment. Realign sprocket.
Tooth worn to sharp to sharp point indicates loose or worn chain.
Tooth worn to cup at base indicates excessive load on chain.
4.3
Observe sprockets for the following:
Main key sheared or shearing. Replace key.
Taper lock hub broken or cracked. Replace hub.
Taper lock hub bolts loose, sheared or stretched. Tighten or replace.
Main set screws loose or missing. Tighten or replace.
Movement or signs of movement of sprockets on shafts.
Alignment – using a straight bar, insure that both sprocket faces are in full contact
with the edge.
4.4
Observe chain for the following:
Loose or worn chain – check rollers, missing cotter keys in master and offset links,
tighten and align idler.
Floor drag chain should be tight. You can test the chain by pulling the chain in the
top center of the floor. The chain should pull up no more than 6-8 inches.
