Inspect the sheaves for wear or damage Replace either or both of them if the damage cannot be repaired.
Have the electric motor inspected and tested by a qualified facility. Repair or replace as necessary.
The shaft mounted torque-arm reducer should be Inspected and repaired following the procedures outlined by
Reliance Electric in Section 3-3-5.
The drum drive chain should be replaced If rollers or side bars show excessive wear or if the chain is
The four bearing assemblies, two on each of the drive and Idler shafts, must be Inspected carefully. Replace
the seals with new ones if the housing is disassembled. Note which bearings are fixed and be sure and put the
fixing ring back in place when reassembling. Follow the procedures defined by the bearing manufacturer in
Inspect the three sprockets. If teeth are damaged, worn or deformed replace that sprocket.
Inspect the drive shaft and the idler shaft for cracks, wear or damage from disassembly. Repair or replace as
All fasteners should be replaced if at all possible due to the heat experienced in this area of the drum mixer.
Inspect weldments on the bearing supports, drum sprocket mount brackets, chain guide and on the drive
guards for cracks or damage. Repair or replace as necessary.
Clean the drum surface on the outside and the inside where the drum sprocket mounts.
Install the three drum drive sprocket segments onto the drum. Take care to match the ends so that the
spacing between the segments is correct.
Install all bolts and hand tighten. Install shims between the drum and the sprocket mounting plate if any gaps
exist Torque the bolts.
Install the chain guide to the mount.