Imer Group TR 225 N Handbuch Für Bedienung, Wartung Und Ersatzteile Seite 13

- Check the electrical cable for accidental damage
at the start of every work shift.
7.1 WIRE ROPE
Use exclusively new ropes with characteristics as specified
below complete with certificate of conformity and identification.
- External diameter 5 mm
- Type 133 wires anti-spin
- Strand strength 1.960 N/mm
- Minimum breaking load 16 kN
- Length 31 m
- Surface treatment galvanised, greased
- The IMER reference code is given in the spare parts table.
7.1.1 REPLACING THE ROPE (Fig. 4)
The rope must be replaced by a
qualified service technician.
Remove the hook (4)
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 overforced.
The rope must be attached in this
way. Completely unwind the rope.
Extract from the inside of the drum
through the hole and slot.
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).
Fig. 4.3
Tension the rope for good contact
with the drum surface.
Now wind on the rope in adjacent
turns, one layer at a time.
Ins ert the wi re rope i nto 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.
Fit the hook to the block and tighten the bolt and locknut.
Fig. 4.5
IMER INTERNATIONAL S.p.A.
2
Fig. 4.1
by
Fig. 4.2
Fig. 4.4
TR 225 N
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.
7.1.2 PERIODIC CHECKS
- Visually inspect the condition of the rope daily
and whenever it is subjected to abnormal strain (twisting,
bending, kinks or abrasion).
Replace the rope when defective (Fig. 14).
Every three months inspect the entire rope carefully and in
particular the ends. Note down the results in the chart (Table 2)
which must be kept by the site foreman.
- Replace the rope at least once a year. .
7.2 ADJUSTING THE MOTOR BRAKE (Fig. 5)
The electric motor brake is engaged in the event of power
supply failure to the motor.
In the event of reduced braking power, the hoist must be checked by
a skilled maintenance engineer, for adjustments if necessary.
- CAUTION! Before working on the brake, ensure
that the load is removed, the electric power plug is
disconnected and the motor is cool.
7.2.1. Braking adjustment
Remove cap 5 from fan cover 1.
Increased braking: turn locknut 6 gradually counter-clockwise
and check that the brake disengages in descent.
Decreased braking: turn locknut 6 clockwise.
Fig. 5
7.2.2. Air gap adjustment
If the brake blocks or in the event of excessive wear, the air
gap should be adjusted as follows.
Remove fan cover 1 and disassemble fan 2.
Loosen the three hex screws 3.
Brake block: turn ringnut 4 clockwise to increase air gap 7 ad
release the brake, checking the gap distance (0.6-0.8 mm).
Brake wear: turn ringnut 4 counter-clockwise to reduce the air
gap, checking the gap distance (0.6-0.8 mm).
Tighten the three hex screws 3 fully down and refit the fan and
fan cover.
To check brake grip, after adjustment, test braking several times
under full load.
7.3 GEARMOTOR LUBRICATION
The gearmotor unit must not develop oil leaks. Leaks may indi-
cate damage to the aluminium casing. In this case, reseal or
replace the casing.
- Check the gearmotor oil level through the sight
glass before every start-up. Refill as required. The oil
should be changed approximately every 2000 hours. Use
gear oil with ISO VG 460 viscosity at 40°C (SAE 90-140).
- Spent oil is classed as special waste and must be
disposed of in accordance with current applicable
legislation.
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