Bike-Lift HQL 400, Руководство по эксплуатации и обслуживанию

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Operating manual No. 057-2-6-0012-R0 Page 26
Version 2021
EN
8.3 Piston replacement
In case the hydraulic piston must be replaced, proceed as follows:
1- Lower the lifting platform to the minimum height position;
2- Maintain the lowering control of the lift for another 6 seconds, to empty the oil;
3- A second operator must lift the lifting platform by hand up to about 500 mm from the
ground; the fall protection device (once the lift has been brought to the minimum height)
will be unhooked and will be able to fit inside the nearest pawl;
4- The piston is empty, so it can be disassembled by unscrewing the support screws, the pin
(top) and the oil tube (bottom):
Figure 6 – hydraulic piston
5- The piston is replaced by tightening the screws and pin and reconnecting it with the hydraulic
circuit;
6- Keep the ascent button pressed for as long as necessary for the piston to re-fill and start the
lifting operation;
7-
Then proceed with the operation of bleeding the hydraulic circuit (Paragraph
8.2
)
Piston maintenance:
It is recommended to consider the following aspects:
- The results of the checks and maintenance must be planned and documented;
- Check the oil leaks from the oil nozzle and/or leaks on the heads
- Set the lubrication intervals for spherical joints, supports and all components that are not
self-lubricated
The stem must always be retracted during long-lasting machine downtime