Airo X RT Series, Use And Maintenance Manual

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Use and Maintenance Manual - X_RT Series Page 68
7.3.9 Braking system efficiency check
These valves check the minimum operating pressure during drive (in
both running directions) and affect the dynamic braking and the drive
speed. Normally, these valves do not require any adjustment, since
they are calibrated at the factory before the machine is delivered. The
braking valves stop the machine when the drive controls are released.
Once the machine has stopped, the parking brakes automatically
come on, thus keeping the machine in position.
Check operation at least once a year.
To check the operation of the braking system:
With platform completely lowered place the machine on a flat
ground, free of obstacles, operate the drive control and when the
max. speed is reached, release the control immediately.
The correct operation of the braking system allows the machine
to stop within a distance lower than 130 cm at third speed..
In any case the braking system can stop and keep the machine
on slopes as indicated in
"
Technical features" (the braking
distance on descents is longer; drive downwards at the min. drive
speed).
Calibration of both braking valves is required:
in case of replacement of the hydraulic block F
If one or both braking valves are to be replaced ( D – E ).
To calibrate the braking valves:
Locate the hydraulic block F.
Locate the braking valves D – E (one for each running direction).
Introduce a manometer with max. scale at least up to 300 bars in the special quick coupling A (1/4” BSP) marked M1-3 .
On the platform control panel select the minimum drive speed.
Unscrew the adjusting dowel lock-nut.
Using the platform control panel drive the machine (in the direction controlled by the valve) on a flat ground in straightforward
direction and adjust the braking valve (relevant to that running direction) by means of adjusting dowel
D so as to achieve the
required pressure value (call the nearest Service Centre to ask for the exact value).
Once the required pressure value has been achieved, check that the valve controlling the braking in the opposite direction has
maintained its adjustment.
Once adjustments are complete (pressure values in the two directions must not vary by more than ±5 bar), lock the adjusting
dowel by means of the lock-nut.
WARNING!
AS THIS OPERATION IS VERY IMPORTANT IT IS TO BE CARRIED OUT BY SKILLED TECHNICIANS ONLY.
Fig.29