Slat Conveyor Liner Detail Figure 21
Replacing Slat Conveyor Liners (Refer to Figure 21)
IMPORTANT! Before replacing liners, operator should advance the slat conveyor to the position where five chain
links instead of the normal three, are in contact with the top of the rear slat conveyor sprockets. This will allow more
working space for breaking the chain.
To remove liners:
(1) Elevate paver to allow safe and adequate working area under the hopper.
(2) Remove hopper end cover plate "B".
(3) Remove clamp "C" that holds center cover plate "D" in place.
(4) Remove center cover plate "D", and side covers "A".
(5) Raise flow control gates "E" for additional clearance.
(6) Loosen slat conveyor chain "F". (Refer to first paragraph of slat conveyor instructions for proper procedure in
(7) Break both slat conveyor chains "F" at rear sprocket, by removing two cotter pins and pins on
each chain extension link.
(8) Remove slat conveyor "G" by sliding it forward and out the bottom opening at the front of the hopper.
NOTE: It is only necessary to remove the top section of the slat conveyor. Leave the bottom section in place.
(9) Loosen and remove flat head bolts "H" that hold the liner plates "J" in place.
(10) Slide front liner plate "J" forward and out the top of hopper to remove.
(11) Rear plates are also removed by sliding them forward and out top of hopper.
(12) To replace liner plates, reverse removal procedure.
IMPORTANT! The right and left slat conveyors have one front, two center and one rear liner plates. Each plate
can be removed individually, and it is not necessary to remove the front plate when only replacing the rear plate.
Build-up Of Worn Screw Conveyor Figure 22
RESTORING WORN SPREADING SCREWS TO ORIGINAL DIAMETER
(1) When effective diameter of spreader screws is less than 11/2" for 12" original screw diameter or 131/2" for 14"
original screw diameter, remove and build up by hard facing with welding rod. (See Figure 22)
(2) Add hard surface weld in a spiral direction only when rebuilding the spreader screws. Welding in this manner
considerably reduces drive load incurred when rebuilt screws are reinstalled, and allows for most efficient feed control.
NOTE: It is recommended that an extra set of spreader screws be available for use while repairs are being made.
(3) The paddles on the screw shafts which move material inward toward the center of the screed should also be
built-up with weld to their original diameter.
RE-FACING WORN SCREW CONVEYORS
When screw conveyors are severely worn they can be re-faced with special contoured liners made from Ni-hard
alloy. The application of these liners restores the screw to near new condition. To apply genuine CEDARAPIDS Ni-hard
liners to a screw conveyor section proceed as follows:
(1) Remove screw conveyor from paver.
(2) Clean screw sections as much as possible, particularly in the weld areas.