Replacement of damaged head end sprocket assembly of Re-Cycle(RC) Elevator A in NP Plant, FACT CD

Replacement of damaged head end sprocket assembly of Re-Cycle(RC) Elevator A in NP Plant, FACT CD.

Replacement of damaged head sprocket assembly of Re-Cycle (RC) Elevator A in NP Plant, FACT CD The work involves making site arrangements and collecting chain blocks, tools, and tackles from the tool crib or store. Remove the coupling guards and de-couple the gear coupling with the spacer connecting the gearbox output shaft and the elevator sprocket shaft. Dismantle the top cover of the Re-Cycle (RC) Elevator A. Remove the buckets at the drive-end area, and de-link the chain on both sides by removing the connecting pins with suitable hammers and attachments. Flame cutting or heating is not allowed for de-linking the chain. Chain blocks shall be provided at the drive-end area to hold the remaining chain links and buckets before de-linking the chain. Lift the tail-end sprocket and hold it using chain blocks, if necessary. Take out the damaged head end Shaft-Sprocket assembly along with the Plummer-Block & Coupling half from the elevator using chain blocks and shift it to the ground floor. Transport the damaged head-end Shaft-Sprocket assembly to the mechanical workshop. Remove the coupling half attached to the Gearbox and replace it with a new coupling half as per the instructions from the Engineer-in-Charge. Remove the coupling half, plummer blocks, and bearings with sleeves from the damaged sprocket shaft assembly. Transport the new head end sprocket assembly to the mechanical workshop and fix the bearings with sleeves, plummer blocks, and the coupling half as per the instructions from the Engineer-in-Charge. Transport the new Sprocket-Shaft assembly with the Plummer-Block & Coupling half to the site and erect it at the position properly. Provide assistance for the alignment works. Re-fix the elevator chain with connecting pins over the sprocket and fix the buckets at the drive end area. Inspect and repair all the guide angles as per the instructions from the Engineer-in-Charge. Couple the shaft sprocket assembly and the gearbox output shaft with the old/new gear coupling spacer. Release the chain blocks and box up the bottom area after inspection/clearance from the Engineer-in-Charge. Fix the Top cover, coupling guard, and take the trial run. After successful run clear the site and transport the chain blocks, tools, and tackles to the tool crib/store. Transport the damaged/worn out parts to the scrap yard/workshop area as per the instructions from the Engineer-in-Charge.

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