Checking the load hook

Only with chain hoists

 

   Measure the widening ‘e’ of the load hook.

   Measure the base height 'f' of the load hook.

   The measured values should neither exceed nor fall short of the values in the table.

Size of load hook	Type of load hook	Max. widening ‘e’ [mm]	Min. base height 'f' [mm]	Material
012	single	26.4	18.1	STE 355
025	single	30.8	22.8	STE 355
05	single	37.5	29.5	34 CrMo 4
1	single	44.0	38.0	34 CrMo 4
1.6	single	49.5	45.6	34 CrMo 4

 

 

   If the load hook has been widened to a greater degree than is allowed or if the base height is below the permissible limit, replace the load hook.

 

 

   If the load hook is deformed (even if within the measurements given above): Inspect the surface for cracks.

 

Only with wire rope hoists

 

	Load hook crosshead
Load hook

   Rotate the load hook backwards and forwards.

The load hook must be easy to move and freely rotatable.

   Slew the load hook backwards and forwards at the load hook crosshead.

The load hook crosshead must be freely slewable.

 

 

   If the load hook is not easy to move or freely rotatable or slewable, it must be repaired.

ABUS Service will gladly provide assistance if needed. See ABUS Service.

 

 

Bracket

   Inspect the brackets. They must not exhibit any cracking, deformation or other signs of damage.

 

 

   If the brackets are deformed or damaged in any other way, they must be replaced.

 

 

   Measure the distance ‘y’ between the two stamped markings.

   Read the reference distance for ‘y’ from the test log book or, if applicable, from the load hook itself.

The measured distance 'y' must not be greater than 1.1 times the reference distance 'y'.

With ramshorn hooks, the distances 'y1' and 'y2' from the engraved marking on the tip of the load hook to the marking on the shaft must each be measured and compared separately.

   Measure the base height 'f' of the load hook.

   Compare the measured value with the table.

The measured base height ‘f’ must not be smaller than given in the table. The table specifies the minimum base height.

Size of load hook	Type of load hook	Min. base height 'f' [mm]
1	Normal hook	38
1.6	Normal hook	45.6
2.5	Ramshorn hook	47.5
2.5	Normal hook	55.1
4	Ramshorn hook	57
4	Normal hook	63.7
6	Ramshorn hook	71.3
6	Normal hook	80.8
8	Ramshorn hook	80.8
8	Normal hook	90.3
10	Ramshorn hook	90.3
10	Normal hook	100.7
12	Ramshorn hook	100.7
12	Normal hook	112.1
16	Ramshorn hook	112.1
16	Normal hook	125.4
20	Ramshorn hook	125.4
20	Normal hook	142.5
25	Ramshorn hook	142.5
25	Normal hook	161.5
32	Ramshorn hook	161.5
32	Normal hook	180.5
40	Ramshorn hook	180.5
40	Normal hook	201.4

 

   If the load hook has been widened to a greater degree than is allowed or if the base height is below the permissible limit, replace the load hook.

Do not carry out any repair welding (e.g. build-up welding) on the load hook or on the load hook nut.

 

 

Edge at transition to adjacent area in hook bed	Protruding burr

   Check the wear surfaces in the hook bed. They must merge gradually with the surrounding surfaces. They must not have any sharp score marks and edges or other surface faults.

   Inspect the edges. The side edges on the hook should not have any exterior protruding burrs or similar surface faults.

   If the wear surfaces or side edges do have sharp score marks or edges, these may be smoothed (e.g. filed). The limit values for base height given above must be observed even after smoothing.

 

 

   Inspect the load hook surface. It must not have any faults, cracks or corrosion.

   If the surface of the load hook is to any extent not OK, disassemble the load hook and inspect the surface of the hook shank. It must not have any faults, cracks or corrosion.

 

 

With load hooks with anti-rotation device through tensioner sleeve:

	Load hook nut
Tensioner sleeve

   Tilt the load hook until the anti-rotation device is clearly visible.

   Inspect the anti-rotation device. The locking pin must be present, may not be damaged or broken and it must sit securely.

   If the locking pin is missing or damaged, it must be replaced.

 

 

With load hooks with anti-rotation device through locking plate:

	Safety plate
	Load hook nut

   Tilt the load hook until the anti-rotation device is clearly visible.

   Inspect the anti-rotation device. The safety plate must be present, undamaged and fit securely.

   If the locking plate is missing or damaged, it must be replaced.

 

 

Hook safety latch

   Inspect the hook safety latch. It must be present, functional and easy to move, and must not be deformed or damaged in any other way.

   If the hook safety latch is missing, damaged or not working properly, it must be replaced.