1CHECK LIST

• Inspection type	Inspection item
  Non-destructive inspection	1) All of boom welding part	Magnetic Particle Test : Not performed
  	2) All of the upper and lower welding parts of turn table
  	3) Track driving part
  	4) A-frame structure part
  	5) Connection bolts of main structure part	Ultrasonic Test : Not performed
  	6) Fixture bolts for ring-gear connection
  Naked eye, Punching, Measurement	1) Structure part: External appearance inspection (twisting, bending, cracking)
  	2) Mechanical device     ① Driving device: Whether the connected bolts are loosened, the status of each switch, etc.     ② Sheave bearing and pin: Abrasion, cracks, etc. of sheave groove and arm & boss     ③ Wire rope: Damage & cracks, fracture, corrosion, etc.     ④ Inspection of cracks, abrasion, etc. of other devices
  	3) Slewing device
  	4) Electric device

• 

[Display of inspection result] O(OK), △(Adjustment & Supplement), X(NG), N/A(not applicable)

Inspection item	Inspection point	Inspection content	Result	Non-conforming content
1) Boom	① External appearance	Twisting, bending, cracking, and transforming state	O
		Fracture, peeling and loss state	O
	② Welding part	Incomplete penetration, blow hole, undercut, overlap, and son on	O
		Surface crack and internal penetration state	O
		Corrosion and oxidation state	O
	③ Connection part	Crack, abrasion, and transformation state	O
		Corrosion and loosening state	O
2) Turntable structure part	① External appearance part	Twisting, bending, cracking, and transforming state	O
		Fracture, peeling and loss state	O
	② Welding part	Incomplete penetration, blow hole, undercut, overlap, and son on	O
		Surface crack and internal penetration state	O
		Corrosion and oxidation state	O
3) A-frame connection part (tower head)	① External appearance part	Twisting, bending, cracking, and transforming state	O
		Fracture, peeling and loss state	O
	② Welding part	Incomplete penetration, blow hole, undercut, overlap, and son on	O
		Surface crack and internal penetration state	O
		Corrosion and oxidation state	O
4) Connection pin & bolt	① Structure and surface part	Twisting, bending, cracking, and transforming state	O
		Internal and external crack state	O

[Display of inspection result] O(OK), △(Adjustment & Supplement), X(NG), N/A(not applicable)

Inspection item	Inspection content	Result	Non-conforming content
1) Brake	No noise and smell at the time of running, and smooth operation No one-sided wear of lining, and the abrasion loss below 50% of original size No damage and crack of disk (drum), and the abrasion loss below 10% of original size	O
2) Track driving device	Drive reducer, no loosened bolts, chains, and track Good oil feeding and no loosening and abrasion for drive-axis bearing and connection coupling No abrasion and damage for track roller	O
3) Hook block	For the hook main body, no crack, transformation, and abrasion and local abrasion loss below 5% of original size	O
4) Wire rope or chain	Wire ropes or chains shall comply with the provision “prohibition of the use of wire ropes with seams, etc.” in 「Regulations of Occupational Safety and Health Standards」. The wires on the end of ropes shall have no cut, corrosion, and kink, and the fixture devices shall not be damaged, be loosened, or fall. When a hanging tool is placed on the most bottom, it shall be wounded around drum at least twice. No cracks shall be found, and elongation shall be below 5%, or diameter reduction be below 10%.	O
5) Drum	The main body of drum shall have no crack, transformation, or abrasion	O
6) Sheave	Rotating frame and bracket shall have no crack and transformation
7) Engine	Verification of various filters Verification of bent belts and oil deterioration Verification of any damage to external appearance	O
8) Safety device	Over-winding protector, emergency stop device, and overload protector shall meet safety inspection standards. Drum/ Lock device shall work smoothly.	O

2Checkpoints

• Inspection item	Driving device (infinite track)
  Inspection content	Make sure it matches the manual
  Pictures of inspection
  Requests for action	Conformity

• Inspection item	Driving device (infinite track)
  Inspection content	Verification of the external appearance and operation of drive part, and upper & lower part rollers
  Pictures of inspection
  Requests for action	Conformity

• Inspection item	Turntable
  Inspection content	Verification of bolt (external shaft) connection of turntable
  Pictures of inspection
  Requests for action	Conformity

• Inspection item	Wire rope (main)
  Inspection content	Verification of the external appearance and diameter of wire rope
  Pictures of inspection
  Requests for action	Conformity

• Inspection item	Wire rope (boom luffing)
  Inspection content	Verification of the external appearance and diameter of wire rope
  Pictures of inspection
  Requests for action	Conformity

• Inspection item	Inspection of the external appearance of boom
  Inspection content	Verification of external structure transformation * No performance of the inspection in the way of going down boom due to field conditions
  Pictures of inspection
  Requests for action	Conformity

• Inspection item	Luffing boom end
  Inspection content	Verification of sheave operation and external structure
  Pictures of inspection
  Requests for action	Conformity

• Inspection item	Hook block
  Inspection content	Verification of external appearance, the number of wire rope strands (nine), and wedge
  Pictures of inspection
  Requests for action	Conformity

• Inspection item	Over-winding protector
  Inspection content	Verification of the operation of over-winding protector
  Pictures of inspection
  Requests for action	Conformity

• Inspection item	Crane setting state
  Inspection content	Counterweight: 250Ton, Carbodyweight: 90Ton
  Pictures of inspection
  Requests for action	Conformity

• Inspection item	Crane setting state
  Inspection content	Main Boom: 54m, Luffing Boom: 42m
  Pictures of inspection
  Requests for action	Conformity

• Inspection item	Operation device and three-color-lamp at operation room
  Inspection content	Verification of the operation of various levers and three-color lamp
  Pictures of inspection
  Requests for action	Conformity

3Non-conforming cases

• Checkpoint	MAIN BODY
  Type	No conformity	Action / Verification
  Photo
  Content	Failure of the upper system (overload) warning lamp at operation room	Verification of the normal operation of overload warning lamp, etc.

• Checkpoint	TRACK
  Type	No conformity	Action / Verification
  Photo
  Content	Loosening arises due to the tension of infinite track.	After tension joint work is done, shoe plate is levelled completely.

• Checkpoint	BOOM
  Type	No conformity	Action / Verification
  Photo
  Content	Rust removal is requested due to boom paint peeling.	After the surface is treated, overall corrosion-resistant coating work is complete.

• Checkpoint	HOOK
  Type	No conformity	Action / Verification
  Photo
  Content	No description of the rated capacity of hook block	After the paint coating work is complete, the rated capacity is displayed.

4Inspection result

• Enforcement point

  Verification of consistency for the structure main body, registration certificate, and machine number

  Supply conditions after actions are completely taken for nonconforming cases found in the inspection before carry-in

  Inspection is requested to be undertaken in accordance with the inspection standards of Ministry of Labor and Employment

  Education point

  TBM is requested to be made for harmful and dangerous factors before work.

  A signaller’s signals are requested to be followed strictly before work.

  Removal of risk factors in compliance with the safety management rules for workers

  Engineering point

  Safety device (over-winding protector, overload protector, luffing limiter, etc.)

  Winding devices (wire rope, abrasion, hook sheave, sheave bearing & pin, etc.)

  Control devices (brake, lining, lever, pedal, handle, etc.)

  Inspection of oil leakage of hydraulic system line (inspection of driving devices like the main body and track)

  The operation state of electric devices, and the painting state of external appearance (crack and corrosion resistance of boom, hook, pin, etc.)

• Future main management points

  The protectors (overload protector, over-winding protector, limit switch, emergency stop device, etc.) attached to construction equipment always have the risk of disasters that may be caused by changes in use conditions, transformation, and careless use. They are required to be inspected primarily before work start regardless of a safety inspection cycle.

  Crane specifications depend on a gross weight and boom length. It is required to describe them in a work plan and to compare them with actual crane set values. For work, it is also required to compare the operating radius in the plan with an actual operating radius.

  Other problems and information sharing points

  Verification of the consistency between preliminary inspection equipment and the supplied equipment

  The disassembled parts, which are not inspected in preliminary inspection, are put together first and then are inspected for safety.
  - The operation state, etc. of overload protector, over-winding protector, safety device, and electric device

  Action results written in a related form are required to be submitted three days before equipment supply.