The charging conveyor transfers the mixed aggregate from the four bin feeder to the drum mixer. This mixed aggregate is
passed over a single screen designed to remove any contaminates or oversized aggregate.
Removal, Repair and Replacement See figure 3-51.
This procedure assumes a complete removal, repair and replacement of the assembly. A partial disassembly, repair and
replacement is possible. Follow the procedure to the point of removing only those components requiring repair or
Disconnect and lock out the breakers for the screen drive motor and the conveyor motor.
Remove the outer half of the screen drive guard.
Remove the junction box cover on the electrical motor. Label the electrical wires and disconnect the three power
wires and the ground. Disconnect the ground strap from the electric motor to the frame.
Remove the four fasteners in the base of the electric motor. Remove the drive belt and the motor from the mount.
Remove the sheave from the screen shaft (10) following the instructions in Section 3-8-10. The inner half of the
drive guard can be removed.
Support the screen deck at each corner with a sling from an overhead hoist.
The screen is mounted on four springs. These are removed by removing the set screws in the mount at the top
and bottom of each spring. The spring can be removed by sliding it toward the screen shaft. The spring spacers
and rubbers will usually come out with the spring. These will be required at assembly. Remove each of the
The screen deck can be removed from the chassis.
Remove the sheave from the motor following the instructions in 3-8-10.
Remove the two pulley guards (29) from the screen body.