SEAL 2T3284 - Caterpillar

Inspect the Elevator Chain
Illustration 1 g00490921
Inspect the slack of the elevator chain. Inspect the slack at the widest space that is between the arrows. The upper arrow is located at the lower edge of the frame assembly for the elevator. The lower arrow is on the upper side of the elevator chain. The widest space will be halfway between the upper sprocket and the lower idler. The slack in the elevator chain should be 254 to 356 mm (10 to 14 inches). Adjust the elevator chain when the distance between the arrows exceeds 356 mm (14 inches) .The elevator chain should be inspected for wear. Measure the length of 10 chain links. Replace the elevator chain if the 10 links measure more than 1079 mm (42.5 inches). Refer to Disassembly and Assembly, SENR6809, "Elevator Flight Assemblies and Chain Assemblies" for further information.Note: Failure to replace a worn elevator chain will result in excessive wear to the drive sprockets.Adjust the Elevator Chain
Illustration 2 g00490922
Remove the jack (5) which is located under the scraper. The jack is located near the push block.
Illustration 3 g00490923
Typical Example
Remove the pins (6) from the jack.
Attach one end of the jack to the frame assembly for the elevator (1) . Adjust the jack until the other end of the jack can be attached to the adjuster arm (2) .
Extend the jack until the pressure is off of the adjusting bolt (3) . Remove the adjusting bolt.
Extend the jack until the desired tension of the chain is achieved. Install the adjusting bolt (3) . The adjusting bolt must be secured in the rail (4) .
Shorten the jack in order to relieve the pressure on the mounting pins for the jack. Remove the mounting pins in order to remove the jack.
Repeat Steps 3 through 6 in order to adjust the other elevator chain.
Install the mounting pins in the jack. Install the jack in the storage area that is under the scraper.Note: Remove a half link from each elevator chain in order to obtain more adjustment of the chain.