GB
5
2.3 p. 34), or travel along the wire rope, with the load,
the wire rope itself anchored to a fixed point (Fig. 2.4
p. 34).
In example 2.2 p. 34, the maximum working load of the
pulley and the anchor point should be equal to or grea-
ter than twice the load.
N.B. Whatever the rigging arrangement, and if the
machine is anchored directly to a fixed point, ensure
that there are no obstructions around the machine
which could prevent the wire rope, the machine and
anchor from operating in a straight line. It is there-
fore recommended to use a sling of an appropriate
capacity between the anchor point and the machine
(Fig. 3 p. 34).
WARNING : Any rigging arrangement which
requires the calculation of the forces applied should be
checked by a competent engineer, with special attention
to the appropriate strength of fixed point used. For work
such as guiding the trunk in tree felling, the operator
should ensure that he is outside the danger area by pas-
sing the wire rope around one or more return pulleys.
The capacity of the machine may be increased consi-
derably for the same effort by the operator by using mul-
tiple sheave blocks. (See the examples set out in Figs.
6.1 and 6.2 p. 34). The increase in the capacity shown
is reduced depending on the efficiency of the pulleys.
The diameter of the pulleys used should be equal to at
least 18 times the diameter of the wire rope. (Refer to
the applicable regulations).
For any rigging arrangement other than those des-
cribed in this manual, please consult TRACTEL
®
S.A.S. or a competent specialist engineer before
operating the machine.
3. INSTALLATING THE WIRE ROPE
N.B. When handling the wire rope it is recommended to
protect the hands by using work gloves.
3.1. Jockey
™
(green plastic casing).
1. Uncoil the wire rope in a straight line to prevent
loops or kinks.
2. Release the internal mechanism (See section 4 :
‘Releasing and closing the jaws’).
3. Insert the tapered end of the wire rope through the
rope guide E and push it through the mechanism
until it emerges at S (Fig. 7.2).
4. Pull the slack wire rope through the machine to the
point required.
5. Engage the jaws by operating the rope release
catch (See section 4 : ‘Releasing and closing the
jaws’).
6. Couple the two eyes of the sling which is around the
anchor point to the hook of the machine. (See sec-
tion 5 : ‘Anchoring’).
7. Fit the operating handle on the forward operating
lever and by moving it back and forth the wire rope
will be pulled through the machine. The reverse ope-
rating lever allows the user to slacken off tension or to
lower the load.
After this procedure the machine is ready for operation,
providing the load is correctly anchored to the machine or
the wire rope (See section 5: ‘Anchoring’ and section 2:
‘Rigging arrangement’).
If the wire rope is to be anchored to a high anchor point,
the wire rope should be anchored before fitting the wire
rope in the machine.
3.2. Jockey
™
J5 (aluminium casing)
1. Uncoil the wire rope in a straight line to prevent loops
or kinks.
2. Release the internal mechanism (see section 4 :
‘Releasing and closing the jaws’).
3. Insert the tapered end of the wire rope through the
rope guide E and push it through the mechanism until
it emerges at S (Fig. 8.2).
4. Couple the two eyes of the sling which is around the
anchor point to the hook of the machine. (See section
5 : ‘Anchoring’).
5. Pull the slack wire rope through the machine to the
point required.
6. Engage the jaws by operating the rope release catch
(See section 4 : ‘Releasing and closing the jaws’).
7. Fit the operating handle on the forward operating
lever and by moving it back and forth the wire rope
will be pulled through the machine. The reverse ope-
rating lever allows the user to slacken off tension or to
lower the load.
After this procedure the machine is ready for operation,
providing the load is correctly anchored to the machine or
the wire rope (See section 5 : ‘Anchoring’ and section 2 :
‘Rigging arrangement’).
If the wire rope is to be anchored to a high anchor point,
the wire rope should be anchored before fitting the wire
rope in the machine.
4. RELEASING AND CLOSING THE JAWS
Each machine is fitted with a rope release catch (4) for
releasing the jaw mechanism and which should only be
operated when the machine is not under load.
There are two positions for the rope release lever : relea-
sed or engaged.
