The position of arm (1), with one elevator carrier
roller, can be moved to another position to tighten the
elevator chain when it is too loose.
The elevator chain is too loose when the distance
measured between the bottom of the elevator frame, half
way between the sprocket and the lower roller, and the
chain is more than 10 in. (254 mm). The correct distance
is 6 to 10 in. (152 to 254 mm).
ELEVATOR CARRIER ROLLER
1. Arm. 2. Holes. 3. Bolt.
To tighten a chain, remove bolt (3) and move arm (1
toward the chain at the top and install the bolt in one of
holes (2). The torque for the nut on bolt (3) is 300 to 31
lb. ft. (410 to 430 N m).
If the chain is too loose after arm (1) is moved as far
as it can be moved, remove a link from the chain. One
link changes the length of the chain approximately 3 in
When an adjustment is made for the chain on one
side, the chain on the other side of the elevator track
must have the same adjustment.
The sprockets must be in alignment with the rollers
or the chains will come off the sprockets. When sprocket
alignment is necessary, loosen the four bolts in the
carrier assembly, for the sprocket on the right side, and
move it to correct the alignment. The torque for the
carrier assembly bolts is 375 to 400 lb. ft. (510 to 540 N
The correct clearance between the bottom edge of
the ejector and the scraper floor is .03 to .25 in. (0.8 to
1. Roller shafts. 2. Holes (in shafts). 3. Locknuts.
If the clearance is not correct, loosen locknuts (3),
then use a rod in the .44 in. (I 1.1 mm) diameter holes
and turn roller shafts (1) to get the correct clearance.
Tighten locknuts (3).
NOTE: The center of the shaft diameter for the roller is
not in alignment with the center of the shaft diameter for
roller adjustment. When roller shaft (I) is turned, the
roller moves up and down the same distance the centers
of the shaft are out of alignment.