DONATI SOLLEVAMENTI S.r.l. - Via Quasimodo,17 - 20025 Legnano (MI) - Tel. 0331 14811 - E: [email protected]
42
Visually check the efficiency of the drive wheels on a monthly basis:
Check the components on the drive wheels every three months:
•
Visually check the wear and status of the edgings and rolling bands on the sliding wheels every month, and
take measurements every three months.
•
Control the pads to make certain there are no irregularities. Pads must be replaced if excessive noise or
chaffing is present, or rotation in "jolts," and any difficult and/or irregular rotation.
•
Check for the absence of play in the fittings between the wheel and grooved shaft, as well as between the shaft
and reducer; the presence of play reveals the need to replace the grooved shaft and/or wheels.
Replace the drive wheels if:
•
The thickness of the edging/s on the wheel has diminished by
≥
≥
≥
≥
50%
•
The wheel’s rolling diameter shows wear
≥
≥
≥
≥
5 mm
•
Should the drive wheels require replacing, to obtain the best guarantee in terms
of operation and duration the Manufacturer recommends replacing both drive
wheels
•
For the correct replacement procedure for the wheels, refer to section 6.6
“Replacing parts and components”
On an annual basis, check the efficiency of the:
•
structural elements
•
pins and hinges
•
bolted joints
•
Metal frames on the
“DGT” drive units
or
endcarriages
can be
subject to alterations due to environmental
factors (corrosion, rust, etc.), which can cause damage to the framework and welding. As such, all frames
require cleaning and annual controls to ascertain they are in perfect condition, repairing any damage found is
required;
•
The reaction arms on the swinging reducers, and hinged brackets and pins, are subject to wear, as moving
and oscillating elements under ongoing friction in the contact area. Control these parts regularly and replace
them in the case of excessive wear;
•
On an annual basis, the screw pins on the reaction arms and their housings must be disassembled and
carefully controlled;
•
At least once a year, check to make certain all bolted joints are properly tightened.
Repair frames or replace hinged elements under the following conditions:
•
deformations:
lengthening, flattening, dents, folds;
•
wear:
worn out parts, reductions in section, incisions, abrasion, corrosion, rust, scars,
scratched paintwork;
•
breakage:
weld
cracks, fissures, cuts or incisions, broken parts;
•
variations in section
≥
≥
≥
≥
10%, or in diameter or thickness
≥
≥
≥
≥
5 % with respect to
initial values.
On an annual basis, check the efficiency of the rubber elastomer
•
buffers on the wheel group end stops
•
shock absorbers on the offset gearmotors.
•
Control the
buffers
to make certain they are not deformed or broken, that they do not present symptoms of
aging (cracks, fissures, loss of elasticity) and are well fastened to the structures;
•
Control the
shock absorbers on the offset gearmotors
to make certain they are not flattened, do not present
symptoms of aging (cracks, fissures, loss of elasticity) and are well fastened to the gearmotor reaction arm.
Replace the rubber elastomer parts under the following conditions:
•
permanent deformations:
flattening;
•
breakage:
splits, cuts or incisions, broken parts;
•
signs of aging:
cracks, fissures, loss of elasticity.
In all cases, replace the rubber elastomer parts every 5 years, even if they appear
apparently in good condition.
