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Job Breakdown Sheets
Breakdown No. 30
Operating a Coal Cutting Machine
Jibbing in
1: Collect tools and materials required.
2: Examine the working place.
3: Stay machine in position.
4: Attach rope to turntable.
5: Draw jib into coal.
6: Release haulage rope.
7: Examine the work.
1: Collect tools and materials required.
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Hammer, pick, gumming shovel, ordinary shovel, pick box spanner, set of picks.
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| (b) |
Oil.
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| (a) |
Insert new picks in chain.
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| (b) |
Oil chain and machine as required.
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| (a) |
Set two stay props against the gearhead to keep the machine close to the face.
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| (b) |
Set short sprag between haulage end and coalface so that the haulage rope may be more easily removed when operation completed.
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| (a) |
Connect cable or air hose to machine and then to gate end switch box.
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| (b) |
Release haulage drum.
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| (c) |
Pass haulage rope round machine on face side.
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| (d) |
Attach loop of rope to bracket of turntable or to slewing chain if used.
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| (a) |
Remove jib locking pin. Place guard in position.
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| (b) |
Place haulage clutch handle in cutting position.
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| (c) |
Switch on the power.
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| (d) |
Control the movement of the jib whilst cutting into the coal.
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| (e) |
Clean out the cut.
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| (f) |
Drop jib locking pin into position when jib reaches cutting position.
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| (g) |
Switch off the power.
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| (h) |
Insert nog close to jib.
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| (a) |
Place haulage clutch handle in neutral position.
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| (b) |
Take rope from bracket on turntable or slewing chain. Remove slewing chain if used.
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| (a) |
Secure the roof, reset any supports which have been removed.
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| (b) |
Attach guards or gummer to machine.
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| (c) |
Remove sprags.
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