5
GB
In example 2.2, the maximum working load limit of the
pulley and the anchor point should be equal to or greater
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
point from operating in a straight line. It is therefore
recommended to use a sling of an appropriate capacity
between the anchor point and the machine (Fig. 3).
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 passing the wire rope around one or more
diverter pulleys.
The capacity of the machine may be increased
considerably for the same effort by the operator by
using multiple sheave blocks (see the examples set out
in Figs. 6.1 and 6.2).
The increase in the capacity shown is reduced
depending on the efficiency of the pulleys.
It is essential that the sheaves and diverter pulleys
used with the machine comply with the essential
requirements of standard EN 13157. The TRACTEL
®
pulleys specified in the § on Technical Data comply with
the essential requirements of standard EN 13157. For
special sheaving arrangements, it is imperative that
these sheaves comply with the essential requirements
of standard EN 13157.
For any rigging arrangement other than those
described in this manual, please consult TRACTEL
®
,
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 your hands by using work gloves.
1. Uncoil the wire rope in a straight line to prevent loops
or kinks.
2. Release the internal mechanism (see section 4:
“Releasing and engaging the jaws”).
3. Insert the wire rope through the rope guide at
the end opposite to the anchor point (hook or
anchor pin).
4. Push the wire rope through the machine, and if
necessary, helping it by operating the forward
operating lever.
5. When the wire rope appears through the anchor
point, pull the slack wire rope through the machine,
to the point required.
6. Engage the jaws by operating the rope release
mechanism (see section 4: “Releasing and engaging
the jaws”).
7. Anchor the tirfor
®
machine or the wire rope to the
appropriate fixed point (see section 5: “Anchoring”)
taking care to ensure that the anchor point (hook or
pin, depending on the model) is correctly fixed.
8. Extend the telescopic operating handle until the
spring locks into position. If necessary twist the two
sections of the handle, one inside other, to align the
spring (Fig. 1).
9. Place the telescopic operating handle on the chosen
operating lever (forward or reverse) and twist the
handle to ensure that it is locked in position (about a
half turn).
Following these operations, the unit is ready to use,
provided that the load is properly anchored to the unit or
wire rope (see Sections 5: “Anchoring” and 2: “Assembly
drawings”).
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 ENGAGING
THE JAWS
Each machine is fitted with a rope release lever (Fig. 1
p. 2) for releasing the jaw mechanism, this must only be
operated when the machine is not under load.
There are two positions for the rope release lever (see
Figs. 7, 8 and 9): released or engaged.
N.B. When not in operation, it is recommended that the
rope release lever should be in the engaged position.
The rope release lever must therefore be released
before attempting to feed in the wire rope.
4.1. TU
™
8 and TU
™
16
(Fig. 7)
Releasing:
1. Completely press the rope release safety catch (5)
and lift the rope release lever (4).
2. Release the safety catch and continue to lift the rope
release lever until it locks into position. The internal
mechanism is in the released position.
Engaging:
1. Lift the rope release lever slightly.
2. Press and maintain pressure on the rope release
safety catch, allowing the release lever to slowly
travel back to its original position. Release the safety
catch. The spring mechanism locks the release lever
in position.
4.2. TU
™
32
(Fig. 8)
Place the anchor point against a support.
