Airo A16 J Series, Руководство пользователя

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User’s Manual – A16 J A18 J Series Page 72
7.2.8. Efficiency check, and adjustment of the pressure relief valve (in the main travel system).
The pressure relief valve controls the maximum pressure
of the main (travel) hydraulic circuit. Normally, this valve
does not require any adjustment, since it is calibrated at
the factory before the machine is delivered.
Calibration is strictly required:

After replacement of the hydraulics

After replacement of the pressure relief valve
Perform one functional check a year.
To check the operation of the main pressure relief valve
(see figure aside):
Disconnect power from the electrical pumps EV2 and
EV3 (H and I).
 Introduce a pressure gauge with a full scale of at
least 250 bar in the special quick coupling (1/4”
BSP) D .

Using the control panel on the basket let the
machine travel forwards and backwards. Initially
perform just a soft travel to make sure that the
valves have been disconnected properly (the
machine should not move when you activate the
controls).

Check the detected pressure value. The correct
value should be as stated in the “ Technical
Features ".
Fig. 26
To calibrate the pressure relief valve:
 Disconnect power from the electrical pumps EV2 and EV3 (H and I).
 Introduce a pressure gauge with a full scale of at least 250 bar in the special quick coupling (1/4” BSP) D .

Locate the main pressure relief valve A.

Unscrew the dowel of the lock-nut;

Use the control panel on the basket and let the machine travel forwards and backwards; Adjust the pressure
relief valve by means of the adjusting dowel so as to reach the pressure value indicated in chapter
" Technical Features ". Initially perform just a soft travel to make sure that the valves have been
disconnected properly (the machine should not move).

Once calibration has been carried out, lock the adjusting dowel by means of the lock-nut.
ATTENTION!
THIS OPERATION IS A CRUCIAL MAINTENANCE TASK AND SHOULD BE STRICTLY CARRIED
OUT BY SPECIALIZED TECHNICIANS.