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Job Breakdown Sheets

Breakdown No. 27

Shifting a Face Conveyor

Scraper Chain Conveyor

1: Collect tools and materials required.
2: Examine the working place.
3: Check the new track.
4: Dismantle the conveyor.
5: Rebuild the conveyor in new track.
6: Apply tension to the chain.
7: Examine the completed work and collect tools.

1: Collect tools and materials required.

  (a) 
Hammer, pick, shovel, spanners, Sylvesters and chains.

2: Examine the working place.

(See Breakdown, No. 9, "Examining the working place — at the coalface".)

3: Check the new track.

  (a) 
Make sure the new track is clear of debris.
  (b) 
See that the supports are correctly aligned.

4: Dismantle the conveyor.

  (a) 
Run the conveyor until the chain is at some suitable place for uncoupling.
  (b) 
Switch off the power and hang cable or air hose in clean, dry place.
  (c) 
Release the tension on the chain.
  (d) 
Uncouple the top chain in suitable lengths for handling — replacing bolts in one side of coupling to avoid loss.
  (e) 
Roll up the lengths of chain and move them over to new track.
  (f) 
Lift off the top pans and rest them against goaf side props in new track.
  (g) 
Uncouple bottom chain in convenient lengths.
  (h) 
Uncouple bottom pans.

5: Rebuild the conveyor in new track.

  (a) 
Draw over engine end and tension end into new track using Sylvesters.
  (b) 
Couple up bottom pans in new track between engine end and tension end. Ensure pans properly aligned.
  (c) 
Lay out and couple up chain in bottom pans, couple chain to short lengths left round engine end and tension end.
  (d) 
Place top pans in position.
  (e) 
Lay out and couple up chain in top pans to short lengths left round engine end and tension end.

6: Apply tension to the chain.

  (a) 
Stay down the engine end.
  (b) 
Apply tension to the chain by means of screws attached to tension end structure or by means of Sylvesters set at tension end.

7: Examine the completed work and collect tools.

  (a) 
Check that the structure has been carefully aligned.
  (b) 
Couple up the cable or air hose, switch on the power.
  (c) 
See that the chain runs properly in the pans, correct where necessary, lifting the pans where required.
  (d) 
When satisfied all is correct switch off the power.
  (e) 
Collect tools and place where safe.

 

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