lift it may happen that the flanges of the beam will not hang in a clear horizontal position. Ensure
that you never exceed the thickness of flange and that the pivot always stays in full grip contact
with the profile.
Remark: when handling the load, one should ensure that the load and or clamp does not
encounter obstacles which could release the load on the clamps prematurely.
A clamp is a device that must be clean when used. Dirt has an adverse effect on the operation
and also on the reliability of the clamp. When cleaning the clamp care should be taken to
ensuring that moving parts are lubricated and the gripping surfaces are clean. Regular cleaning
will enhance the life and reliability of the clamps.
3.
Inspection protocols
Prior to every application of the clamp it is important the clamp operator inspects the clamp for
proper functioning. Attention must be paid to the following (see illustration(s) 2 for part reference):
Ensure that the plate surface with which the clamp is to come into contact is free of scale,
grease, oil, paint, water, ice, moisture, dirt and coatings that might impede the contact of the
gripping surface with the plate.
Inspect pivot(s) (C) and camsegment (B) for wear and defects. The pivot(s) and teeth must be
sharp and free of dirt.
Check the body (N) and the jaw for damage, cracks or deformation (this may indicate
overloading). The clamp must open and close properly (when the operation of the clamp is stiff
or heavy, it should be removed from operation for inspection).
Check the chain (Z) for readily detectable wear and/or damage. It must be possible to turn the
chain freely around the hinge pen (R), between the camsegments (B).
Check the hinge pen (R) and the camsegment shaft (G) for readily detectable wear and/or
damage.
Check the torsion spring (M). Open the clamp by moving the latch lever (A) towards the hand
grip (X). There should be clearly apparent spring tension. The clamp should, when releasing the
latch lever, return without problems to the closed position.
Check whether the W.L.L. and the jaw opening stamped on the body corresponds with the
load to be lifted. When this is no longer readable, remove the clamp from operation.
The pivot(s) and the camsegment are the most critical parts in the clamp and require extra attenti-
on during inspection. Ensure in any event for good light during inspection. Observe the following
rules during every inspection:
Pivot(s): Reject when the sharpness of one ring is damaged or worn for 50% or more.
Camsegment: Reject when the sharpness of one tooth is damaged or worn for 50% or more.
On the inside of the front cover illustrations have been included of damaged and worn (rejected)
pivots and camsegments:
1. One complete tooth not sharp and one damaged
2. Two teeth damaged for 50%
3. One tooth damaged for 100% and one tooth damaged for 50%
4. Two rings damaged for 100%
5. Interior ring damaged for 100%
These areas of damage, precisely as wear, are not covered by the warranty.
In most cases however the areas of damage are much less extensive. In doubtful cases an authori-
sed repairer should assess the clamp.
Copyright © 2021 The Crosby Group LLC. All Rights Reserved.
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