Check and adjust the chain.
(a) Check for spread or distorted links. Rotate the rack by hand so that
the entire length of chain has passed over the drive sprocket.
(b) Check the chain tension. Too tight a chain causes the rack to turn
with difficulty and causes bearing wear. Too loose a chain causes the rollers to
hesitate. The chain can be adjusted by lowering the turnaround. When you reach
maximum adjustment, remove a link or replace the chain, and raise the turnaround.
Check springs. Clean, check for wear, and replace if necessary.
(8) Check the rewet roller. Check the rewet roller for signs of wear. Be sure
the roller is in contact with rollers above and below it.
(9) Check the baffle. Be sure to center the tube portion of the rack baffle on
the hole so that it may depress when you put the rack into the tank. Refer to
Figure 2-12. Rack baffle.