IMER ET 300 Operating, Maintenance, Spare Parts Manual page 13

GB
8.1 STEEL ROPE
Only use new ropes as specified below, complete with certificate of
conformity and identification.
External diameter
Type
Direction of lay
Strand strength
Minimum breaking strain
Length
Surface treatment galvanised, greased
The IMER reference code is given in the spare parts table.
8.1.1 REPLACING THE ROPE
The rope must be replaced by a
qualified service technician.
Remove the hook (4) by unscrewing
bolt (5) (fig. 4.1).
Remove the clamp (1), push on the
wedge (2) and extract the rope from
the block (3).
The drum is fitted with a device which
ensures that 2 turns of rope are
always wound on even when the
rope is unwound to its limit. This
stops the rope attachment from
being over-forced.
Fig. 4.2
The rope must be attached in this way. Completely unwind the rope.
Remove it from inside the drum through the hole and slot. Insert the
new rope in the hole and thread it through the slot in the drum tube.
Tighten the clamp at the end, leaving about 1 cm of rope free (fig.
4.2), and pull the rope until the clamp comes into contact with the
inner wall of the drum.
Wind on two complete turns keeping the rope in contact with the
drum (Fig. 4.3).
On the second turn pass
the rope under the hook
inside the drum slot (Fig.
4.4).
Tension the rope for
good contact with the
drum surface.
Now wind on the rope in
adjacent turns, one layer
at a time.
Insert the wire rope into
the counterweight and the block (Fig. 4.5).
Pass the rope back through the counterweight and the block.
Insert the wedge between the block and the rope.
Pull the rope to tighten all components. Now lock the rope with a U-
clamp so that the flat part remains in contact with the lifting section of
the rope. Leaving about 1 cm of rope free.
Fit the hook to the block and tighten the bolt and locknut.
Check that the UP limit switch operates when the counterweight
touches the lever.
Run the load test described in paragraph 5 and note down in Table 2
the fact that the rope has been changed.
IMER INTERNATIONAL S.p.A.
mm 5
133 wires (19x7) anti-rotation
r.h.
(N/mm²) 1960
(kN) 16,07
(m) 26
Fig. 4.1
Fig. 4.3
Fig. 4.4
ET 300
8.1.2 PERIODIC CHECKS
Visually check the condition of the rope every day and
whenever it is subjected to abnormal strain (twisting,
bending, kinks or abrasion).
Replace the rope when defective as indicated in fig.9.
Inspect the entire rope carefully every three months and in particular
the ends; note the results in the chart (Table 2) which must be kept
by the site foreman.
Replace the rope at least once a year.
8.2 ADJUSTING THE MOTOR BRAKE (Fig. 5)
The brake is of the no-power engagement type.
If its braking power is reduced a qualified technician must check the
device and adjust it.
Warning!! Before servicing the brake make sure that the
winch is not loaded and that the brake s power supply is
disconnected.
Fig. 5
8.3 GEARBOX LUBRICATION
The gearbox unit must not develop oil leaks. Leaks may indicate
damage to the aluminium casing. In this case, reseal or replace the
casing.
Check the gearbox oil level through the sight glass before
every start up or long storage. Refill as required via the
relative cap on the gearbox. The oil should be changed
every 2000 hours. Use gear oil with ISO VG 460 viscosity
at 40°C.
Used oil is classed as special waste. As such, it must be
disposed of in accordance with established legislation.
8.4 ELECTRICAL SYSTEM
Check the condition of the pendant control case and replace with the
IMER spare part if necessary.
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Fig. 4.5
Remove fan cover (A), and adjust the air
gap d between magnet (B) and brake disk
(C) by means of a feeler gauge. The gap
(d) must be 0.4 mm.
Measurement should be taken at three
points in order to check that the disc is
perfectly parallel to the magnet. Slide the
feeler gauge lightly backwards and
forwards. If the air gap is too wide, redu-
ce it by tightening nut D with a hex
wrench. Check distance d several times.
If the air gap is too small, increase it by
unscrewing nut D .
Once the air gap has been correctly
adjusted, refit cover A .
To check braking power, after carrying out
the adjustment, repeatedly test braking
action under full load conditions.
GB