Cobra G80LC1.3 Instruction Manual

Load Groups
1.3 through to 32 tonne
Note: Operator must read and fully
understand the operating instructions
before using this product.
Concrete
Lifting
Clutch
www.gtlifting.co.uk
George Taylor & Company Lifting Gear (Midlands) Ltd.
Unit 4, Fryers Road, Walsall WS2 7LZ UK
T+44 (0)1922 490220 F+44 (0)1922 490229 E[email protected]
GRADE 80
C
Operating Instructions
& Safety Manual
GRADE 80
C
Products supplied comply with the essential health & safety requirements of the Machinery Directive 2006/42/EC, the Supply
of Machinery (Safety) Regulations 2008 and the Health & Safety at Work etc Act 1974 section 6.
George Taylor & Company maintain a policy of progressive development of products and reserve the right to alter, without
notice, the specifications shown within this manual.

2
GRADE 80
C
DESCRIPTION
Cobra grade 80 concrete lifting clutch is designed
to engage to the head of a lifting anchor system
precast into concrete elements. It consists of two
components;
• Spherical head anchor.
• Lifting link.
The design allows a precast panel to be lifted, turned,
tilted and rotated under load. The design ensures that
only matching components fit together.
The head anchor and lifting link all come from the
same load group. Take note of the load group marked
on the link.
PERIODIC INSPECTION
Before each use of the device and regularly, the
operator shall carry out a thorough inspection in a
clean, well-lit place to check the clutches condition
and proper operation. Carefully check all elements,
paying particular attention to any damage, excessive
wear, corrosion, abrasion, cuts and malfunction.
Keep a record of all periodic inspections, which must
be carried out by a skilled person. The maximum
interval between inspections is one year, but
frequency may vary according to legislation in force
in the country in which the clutches are used. In
the case of continuous or particularly heavy use,
the frequence of inspections must be increased
accordingly.
Any defects found should be corrected before use. It
is important to determine the amount of wear. If wear
is more than 5% take the clutch out of service. The
lettering and identification must be visible. If the link
is deformed or damaged, the device must be taken
out of use and cannot be repaired.
Damage, distortions, cracks and extensive corrosion
can reduce the load-carrying capacity and lead to
failure. This causes a hazard of injury or potentially
death. Any affected parts must be taken out of
service immediately.
In case of any doubts as to the condition and usage of
this device. Do not put into service and consult GT.
SAFETY STANDARD
These warnings indicate a potential hazardous
situation, that if not avoided could result in death or
serious injury. It may also be used to alert against
unsafe practices.
Use only trained personnel. Using the clutch and
lifting device by untrained personnel poses the risk
of incorrect use or falling, which may cause injury
or death. The lifting systems must be used only for
lifting and moving precast concrete elements.
• All lifting anchors and devices must be
operated manually.
• Do not use this device contrary to it’s
intended use.
• This device shall not be used to lift or lower
personnel.
• Do not lift or lower loads over an area
occupied by people.
• Check the stability of the load attached on
which it is hoisted to prevent accidental
detatchment of any element. Hook in all lifting
systems separately, without using force.
• Never use a hammer or tools alike to attempt
to force close the lifting clutch.
Operator should be a competent person.
DO NOT ALLOW PERSONS TO OPERATE OR
ASSEMBLE THIS UNIT UNTIL THEY HAVE
DEVELOPED A THOROUGH UNDERSTANDING OF
SAFETY PRECAUTIONS AND HOW IT WORKS.
DO NOT CHANGE, REPAIR OR REPLACE ANY
ELEMENTS OF THIS DEVICE.
GT holds no responsibility for the change of
mechanical properties which are caused directly
or indirectly from maintenance by a third party,
without written permission from GT.
Safety Information
WARNING
WARNING

3
GRADE 80
C
GRADE 80
C
Safety Information
MAINTENANCE AND STORAGE
Ensure care is taken when using this device. During
operation steps shall be taken to avoid mechanical,
chemical and thermal damage. Do not use a
damaged or malfunctioning device. Clean a dirty
device with a damp cloth. Avoid using chemical
agents to clean the device due to mechanical and
material damage.
When the clutch is disengaged from the anchor,
suitably store the device indoors, away from water
and moisture.
If the clutch is left engaged with an anchor when
not in use, always ensure it has been cleaned and
inspected before resuming operation.
If the clutch shows signs of distortion, cracks,
breaks, serious corrosion or any other damage, or
on which the maximum permissible wear limit has
been reached, it must be replaced.
ENVIRONMENTAL FACTORS
Cobra clutches must not be used in acid
environments or immersed in acid or caustic
solutions or vapours; they must therefore never be
subject to pickling, hot dip galvanising processes or
to any other galvanising process in general. Bear in
mind that strong oxidising agents corrode the metal
of the clutch.
The high tensile strength of the heat treated alloy
material is susceptible to hydrogen embrittlement
when exposed to acidic or caustic substances,
atmospheres and environments. Don’t use the items
in offshore applications.
The possibility of using clutches in the presence
of mineral acids depends on the type of acid, it’s
concentration, the temperature and the duration
of contact. In any case, any clutch contaminated
by aggressive chemicals or their vapours must
immediately be taken out of service, washed in cold
water, dried and exmained by a skilled person.
TRANSPORT
Device(s) shall be transported in suitable packaging
protecting it from damage and getting wet.

4
GRADE 80
C
Operating Instructions
1
The clutch is placed
in the right position.
2
Rotate the link, until the
opening corresponds with
the anchor head.
3
The link rotates to
it’s locking position.
4
The nose of the link is
pushed aginst the
concrete element.
When tilting the concrete unit with the lifting clutch, the nose must face the same direction as the load (see above).
Due to the counterweight of the nose, the link remains connected, even in an unloaded state. To release the Cobra clutch, the
load hook is lowered and the link is turned up and out. The crane can only be withdrawn after the lifting system is completely
detached from the recess and anchor.
Link
“Nose”
Release operation after lifting.
If the link remains in the position
showed above, the lifting of the
concrete unit is not allowed.
Take care to ensure the nose on the link does not raise up from sitting flush on the concrete element.

5
GRADE 80
C
GRADE 80
C
Specifications
Product
Code
W.L.L.
t
A
mm
B
mm
C
mm
D
mm
E
mm
F
mm
H
mm
M
mm
L
mm
Weight
kgs
G80LC1.3 1.3 34 42 80.4 70.5 45 73 157 11.5 181 0.89
G80LC2.5 2.5 42 49 99 85 57 88 190 16 220 1.3
G80LC5 5 55 70 133 88 69 110 233 22 271 3.24
G80LC10 10 74 92 176 116 83 161 336.5 30 386 10
G80LC20 20 111 112 227 132 106 180 429 42 497 20.4
G80LC32 32 155 171 306 190 164 277 568 52 663 46.5
E
F
D
H
L
C
M
A
B

www.gtlifting.co.uk
George Taylor & Company Lifting Gear (Midlands) Ltd.
Unit 4, Fryers Road, Walsall WS2 7LZ UK
T+44 (0)1922 490220 F+44 (0)1922 490229 E[email protected]
GRADE 80
C
GRADE 80
C