JLG X17J Plus Operator Manual - Manual (Page 133)

7.17 CHECKING THE OPERATING PRESSURES IN THE HYDRAULIC SYSTEM
A pressure gauge, with a minimum scale of 250 bars, must be used to carry out this check.
‑ Make sure that the machine is closed and in the resting position.
‑ Make sure that no one is standing within the machine operating range.
‑ All the specified checks must be carried out from the control position in the basket.
a) Connect the pressure gauge to the pressure intake on the aluminium delivery manifold
block located in the proportional valve compartment (see photo).
First connect fitting upper pressure intake.
b) Go to the control position and switch the machine on.
c) Close one of the two right stabilisers completely and maintain the movement activated.
Read the pressure value. This value relates to the right track distributor.
Switch the machine off.
d) Connect the pressure gauge to fitting lower pressure intake.
e) Go to the control position and switch the machine on.
f) Close one of the two left stabilisers completely and maintain the movement activated.
Read the pressure value. This value relates to the left track distributor.
g) Stabilise the machine.
h) Set the second arm cylinder to the FOLDING mode.
Keep the joystick in position.
Read the pressure value. This value relates to the aerial part distributor.
7.18 CHECKING TIGHTNESS OF THE FASTENING SCREWS ON THE PIN RETAI‑
NERS AND THE LOCK NUTS
‑ Check that the fastening screws on the pin retainers and lock nuts are not loose.
‑ If they have become loose, tighten the bolts or the lock nuts, as specified in the para‑
graph “Pin locking bolts and nuts”.
X17JPR0020413
BOOM LIFT MODELS X17JPLUS
JLG
129