DONATI SOLLEVAMENTI S.r.l. - Via Quasimodo,17 - 20025 Legnano (MI) - Tel. 0331 14811 - E: [email protected]
49
6.6.2 Replacing the wheels on “DGT” drive units
Operations regarding the replacement of the wheels must be performed by qualified
and specially trained personnel, and when working above ground level, equipped with:
•
suitable individual protection devices (e.g. safety harnesses, etc.);
•
appropriate working tools (e.g. fork lift, crane, scaffolding, etc.).
after carefully evaluating the following parameters:
•
type of working environment, ambient specifications and type of flooring
•
height of the installation with respect to the flooring and available spaces
•
dimensions and weight of the wheels to be replaced
The wheels must be moved SOLELY using LIFTING EQUIPMENT
(crane, hoist, etc.)
and
a
suitable harness
(textile fabric sling)
fastened loop- like onto the perimeter of the wheel’s
sliding harness
(Fig. 31)
.
It is advisable to replace all the wheels, even if some of them appear in good condition.
To replace the wheels proceed as follows
(Fig. 32)
:
1. For a power wheel, disassemble the offset gearmotor (1), removing the wheel (2), then proceed as outlined at
section 6.5 on page 75;
2. Using appropriate tools (jack, steeve, etc.), lift the operating head by a few centimeters (3) from the side of the
wheel (2) to be replaced;
3. Sling the wheel to be disassembled (2), with a fabric harness (4)
fastened loop-like onto the perimeter of the
sliding harness (fig. 31), without tensioning it, however;
4. Remove the wheel supports (6) on both sides, unfastening the four screws (7), using a screwdriver if necessary;
5. Extract the wheel (2) from the operating head lifting unit housing (3), maintaining it suspended with the harness
(4) and lifting equipment (5);
6. Set down the wheel (2) to be replaced, using the lifting equipment;
7. Set the wheel supports on the ground as well (6), if the bearings must be replaced as well (8).
fig. 31
fig. 32
To reassemble the wheels on the operating head, proceed in reverse sequence.
