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4 SAFETY INSTRUCTIONS
Remember: safety first! Especially where your personal safety and that of the immediate
onlookers is concerned. Carefully read the following safety instructions before using your
new TNMK safety lifting clamp.
Ensure your own safety and continue to benefit from our product safety by having the
clamp inspected, tested, and, if necessary, overhauled at least once a year by Terrier Lifting
Clamps BV or another recognised mechanical repair and service centre. See also Section 8 –
Overhaul. It is not permitted to make any constructive modifications to the clamps, for
example by means of welding or grinding.
Please contact Terrier Lifting Clamps BV for further information.
TEMPERATURE
The operating temperature of the Terrier TNMK lifting clamps lies between –10°C (14 °F) and
+30°C (86 °F) . Please consult with your dealer if other ambient temperatures are applied.
LOADS
Because of their deep jaws, TNMK lifting clamps are especially suited to the hoisting of split
plates. Never place the clamping blocks onto tapered or conical surfaces. If the crane hook
is not secured, and/or if it is very large and heavy, always use a chain sling with D lock and
a length of approximately 75 cm (30 inch) and with a strength matching the safe work load
(WLL) of the clamp. This will prevent the crane driver from lowering the hook too far when
putting down the load, which might cause the hook to disconnect from the lifting shackle.
When attaching directly onto a secured crane hook, make sure the crane hook is able to
move freely within the lifting shackle.
AVOID SITUATIONS INVOLVING RISK OF LIFE
Avoid situations involving risk of life by observing the following directives:
- Never operate an untested lifting clamp.
- Always keep a distance during the hoisting operation and never stand underneath the
load.
- Do not use the clamp if it is damaged. Have the clamp repaired by Terrier Lifting Clamps
BV or another recognised mechanical repair and service centre. When in doubt: contact
your supplier.
- Never hoist more than one plate at a time.
- Never hoist loads heavier than the safe work load (WLL), as is clearly indicated on the
clamp and the certificate.
- Never hoist loads that are thicker or thinner than the clamp opening, as indicated on
the clamp and the certificate.
- When using more than one lifting clamp at the same time, opposite each other, provide
lifting slings or chains of a sufficient length to ensure that the angle between the slings
or chains does not exceed 60 degrees.
- When using more than one lifting clamp at the same time, next to each other, use a
trussed hoisting girder (equalising traverse girder) and sufficiently long lifting slings or
chains, so that the lifting shackle of the lifting clamp is never subjected to a lateral load.
- Never place the clamp onto tapered or conical parts of the load to be hoisted.
- Remove all grease, oil, dirt, corrosion and contamination from the plate at the point
where the lifting clamp is to be attached.
- The clamp is only suitable for use in normal atmospheric conditions.
WARNING
- A free-fall or uncontrolled swinging movement at the crane hook resulting in objects
being struck may cause damage to the clamp. If this occurs, check whether the clamp is
in good working order before using it again.
- Lifting clamps are not suitable for creating permanent joints.
- Preventive maintenance to the clamp should be carried out on a monthly basis.
See Section 6 - Maintenance.
- Do not perform constructive modifications to the clamp (such as by welding, grinding,
etc.). Such modifications may adversely affect its operation and safety. If you carry out
any modifications, you will nullify all forms of guarantee and product liability.
- This is also the reason to only make use of original Terrier replacement parts.
- Any improper use of the clamp and/or failure to observe all directions and warnings in
this user manual concerning the use of this product may endanger the health of the
user and/or bystanders.
5 HOISTING
- Make sure that the safe work load (W.L.L.) and the jaw opening of the clamp (as indi-
cated on the clamp) agree with the load to be hoisted.
- Mount the lifting clamp onto the hoisting mechanism, either:
- Directly to a crane hook by means of a safety shackle,
- By means of a coupling link or D-type shackle,
- By means of a sling or chain, if necessary in conjunction with a coupling link or D-type
shackle.
- Ensure that all attachments have been tested and are of the correct tonnage. Make
sure that coupling links and shackles are large enough to allow the clamp to move
freely in the hook.
- Make sure the clamp has no visible signs of damage.
- Check the lifting shackle and chain for clearly visible signs of wear and/or damage.
- Check the draw spring. It should demonstrate visible tensile elasticity upon inspection
with the safety lever in closed position.
- Check the clamping blocks for signs of damage and defects (the clamping blocks should
be free from dirt and should be dry and undamaged). Check the frame and jaw for
signs of damage, cracks, and deformation (these may indicate overloading).
- Using the lever, make sure the clamp opens and closes smoothly (if the clamp’s operati-
on is difficult, do not use the clamp. Have it serviced immediately).
