User`s manual
74
in the event a new setting of the load limiter is needed, such operation must be performed by Italkrane s.r.l. technical assistance or by
personnel authorized by Italkrane s.r.l.
VERIFICATION OF THE EFFICIENCY OF PARTS AND COMPONENTS
For the single parts of the machines, scrupulously follow the instructions hereunder:
• Annual verification of the efficiency of structural elements, pins and hinges:
• Metallic structures, in addition to the usual alterations due to environmental factors or to wear and tear of mobile
members (hinges), may be subject, sometimes accidentally or during handling operations, to blows, contacts or
sliding with other machines and equipments or even to anomalous stress which may damage carpentry frames,
weldings and pins. Structures, after being perfectly cleaned, must therefore undergo periodical scrupulous checks
to ascertain their suitability and, if necessary, repair any damages.
• Brackets consisting of plates and pin, forming hinge elements, are subject to wear and tear as mobile and oscillating
elements undergoing sliding friction in the contact area. Replace them if, during checks, excessive wear and tear is
discovered.
• All screw-pins, high-grade plugs and pins must be disassembled and carefully checked, together with their seats,
once a year.
• Repair structures and hinged elements, or replace them if they show: deformations, elongations, crushing, dents, buckling,
wear and tear: worn out parts, reduced sections, incisions, abrasions, corrosions, oxidations, scratches, chipped paint, rips:
cracked weldings, cracks, cuts or incisions, broken parts, variations of sections of > 10%, or of diameter or of thickness of
>5% compared to the original values
VERIFICATION
OF
THE
EFFICIENCY
OF
REDUCERS
Check that the noise level of reducers does not vary in intensity. Vibrations or excessive noise levels indicate either worn out toothing or
a faulty bearing.
Check there is no leakage of lubricant.
IN CASE OF ANOMALIES
• Performing corrective maintenance operations on hoisting and traveling reducers is strictly forbidden.
• All extraordinary maintenance operations on hoisting, traveling or sliding reducers must be performed by Italkrane s.r.l
technical assistance or by personnel authorized by Italkrane s.r.l.
VERIFICATIONS
OF
THE
EFFICIENCY
OF
ELECTRIC
MOTORS
Clean the motor(s) removing the dust from the cases as it may hinder regular cooling; check that ventilation openings are not obstructed.
Check, with the nominal load, that there are no anomalous noises (buzzes, frictions)
Make sure that the temperature of the case does not exceed 110° C. Otherwise, find the cause and check the service the hoist is meant for.
Verify absorption and voltage, comparing them to the nominal values indicated on the nameplate of each motor.
IN CASE OF ANOMALIES:
• Performing corrective maintenance operations inside the motors is strictly forbidden
• All extraordinary maintenance operations on hoisting, traveling or sliding motors must be performed by Italkrane s.r.l.
technical assistance or by personnel authorized by Italkrane s.r.l.
VERIFICATION
OF
THE
EFFICIENCY
OF
BRAKES
• Check the brakes are released correctly, verifying that the rotor is not held and/or there are no frictions.
• Check that, with the nominal load, the brake, once the push button is released, holds the load suspended for at least 10 minutes
without the load sagging or skidding.
• In case of skidding, lower the load to the ground, disconnect power supply and check the wear and tear degree of the brake
shoe lining to discover any anomalies.
• If necessary, adjust the brake and/or replace the brake shoe with brake lining.
• Replace the brake shoe with the new brake lining when the load is unstable even after adjusting the brake.
IN CASE OF ANOMALIES:
• Performing corrective maintenance operations motor brakes is strictly forbidden
• All extraordinary maintenance operations on brakes must be performed by . Italkrane s.r.l. technical assistance or by
personnel authorized by . Italkrane s.r.l.