3-3-4 Drum Drive
Removal, Repair and Replacement See figure 3-4.
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 breaker for the drum drive motor.
Remove the two piece drive guard on the belt drive.
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.
Adjust the gear box torque arm loosening the drive belts.
Remove the bolts, nuts and washers holding the electric motor to the motor base. Remove the electric motor
The drive sheave may be removed following the Instructions in Section 3-3-14.
Remove the shaft mounted gear reducer following the procedures specified in the Dodge Torque-Arm Speed
Reducers manual Section 3-3-5. If it is necessary to remove the sheave follow the Instructions In Section 3-3-
Remove the chain drive guard covering the drive sprocket on gear box side of the drum. The two slot cover
plates will have to be unbolted and removed before the guard can be removed.
Remove the chain drive guard covering the Idler sprocket on the opposite side of the drum. The two slot cover
plates will have to be unbolted and removed before the guard can be removed The chain oiler assembly
comes off with this guard. Be careful not to spill the oil In the tank. Close the chain oiler valve. For removal
and/or repair of the chain oiler see Section 3-3-7.
Remove the four wedge shaped chain drive guards and the lower chain guard below the drum.
Remove the drum drive chain by driving out the cotter pin or pin lock In the end of a chain pin at the drive
sprocket. Remove the chain pin. The two chain links may now be separated.
Remove the drive chain from the sprockets.