IMER ET 300 Operating, Maintenance, Spare Parts Manual page 9

GB
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.
The rope must be attached in this
way. Completely unwind the rope.
Fig. 4.2
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.
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.
IMER INTERNATIONAL S.p.A.
Fig. 4.1
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
Fig. 4.3
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.
Fig. 4.4
Insert the wedge between
the block and the rope.
Fig. 4.5
ET 300 (110 V/50 Hz)
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.
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.8.
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.
Remove fan cover (A), (for loosing the screw
of the fan cover, fit the screwdriver in the
frame hole) 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, reduce 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.
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.
9. DISMANTLING
Remove all loads from the winch hook.
Wind the steel rope completely onto the drum.
Disassemble the fixing bracket (ref. B, fig. 8) and remove
the winch from the gantry guides. Carry out this operation
before emptying the ballasts.
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9
GB
Fig. 5