JLG X23J - X700AJ Service Manual - Manual (Page 446)

SECTION 5 - HYDRAULICS
5-20 – JLG Lift – 3121448
EMPTYING OF THE CYLIDER
Vent Valve
Air inside the circuit has to be removed in order to avoid
vibration and irregular motion of the cylinder, vent valves
are apply to make this kind of operation.
Failure to remove air from the circuit can cause diesel
effect with consequent damage of the seals.
Be sure that there is no presence of air inside the cylinder
before it start working.
Purge screw
Figure 5-61.
LOOSEN PURGE SCREW TO LET AIR GOES OUT TIGHTENING
TORQUE 8 N/M.