Warnings Against Hazardous Operations; Troubleshooting - Tractel tirfor TU Série Manuel D'installation Et D'entretien

12. WARNINGS AGAINST HAZARDOUS
OPERATIONS
If used in accordance with the instructions in
this manual, the tirfor ®
are totally safe. However it is helpful to warn the
operator against incorrect operation as descri-
bed below.
The following is prohibited:
- Never attempt to motorise the devices
described in this manual.
- Never use tirfor
maximum working load.
- Never use
operations other than those for which they
are intended.
- Never attempt to operate the release
mechanism whilst
supporting a load.
- Never obstruct the free movement of the
forward and reverse levers or the release
lever.
- Never operate the forward and reverse
levers at the same time.
- Never use any method of operation other
than the original TRACTEL telescopic handle.
- Never replace the original safety pins
with items other than tirfor
same type.
- Never anchor the device by any other
method than its anchoring device.
- Never lock the device in a fixed position
or obstruct its self-alignment with the
direction of the load.
- Never use the wire rope of the device as
a lifting sling.
- Never apply a load to the wire rope
which comes out on the anchorage side.
- Never hit the control devices.
- Never operate of the operating handle by
more than one person.
- Never lift the platform so that the
sleeve of the hook on the wire rope comes
into contact with the housing.
and blocstop™ devices
® devices above their
tirfor ® devices for
the equipment
® pins of the
- Never lower the platform so that the end
of the wire rope comes close to the housing
of the hoist.
- Never prevent the suspension rope from
activating the blocstop™ detection roller.
- Never position the two wire ropes
(suspension and secondary) at a distance
other than that indicated in the blocstop™
manual.
- Never use a wire rope with more than 10
wires broken over a length of 30 times its
diameter.
- Never use a wire rope whose diameter is
reduced by more than 10% of its initial
diameter.
- Never unwind the wire rope without
is
leaving two complete turns on the reeler.
- Never position the wire ropes in a
position other than vertical.

13. TROUBLESHOOTING :

1. If the forward (lift) lever rotates freely on
its shaft without driving the mechanism, this
indicates that the safety pins have sheared as a
result of an overload. They should be replaced
as described in section 9.
2. Pumping. Insufficient oil in the mechanism
leads to a phenomenon known as "pumping"
(not dangerous) occurring during forward
operation (lifting): the device lifts and lowers a
few centimetres, but goes no further. This
phenomenon can be corrected by pouring oil
into the housing. If necessary, move it in
reverse (lowering) for a short distance to
facilitate lubrication of the parts.
3. Jolts. Jerky movement in reverse (lowering)
is also caused by insufficient oil. Proceed as
indicated above.
4. Jamming. If the wire rope becomes jammed
in the device, generally due to damage to the
part of the wire rope inside the device,
operation must be stopped. The load must be
taken over by another device which provides
the statutory safety guarantees, and the
®
Tirfor freed by relasing it when there is no load.
15
GB