JLG X20JP - X600AJ Service Manual - Manual (Page 174)

SECTION 4 - BOOM & PLATFORM
3121623 – JLG Lift – 4-21
3 ASSEMBLY
• Fix the actuator in a proper way to the bench
• Reinstall all sealing elements on their particulars pay-
ing attention to mounting direction (see drawing). If
you have difficulty use appropriate bushings cone.
NOTE: For easy mounting, it is recommended to heat up the ele-
ments of PTFE details 6, 7 and 10 in hot water at 70/80 °
C.
• Put piston P, complete with seals 6 and 7 in actuator
body C.
• Engage gear ring G with piston P referring to the previ-
ously marked position.
• Turn gear ring G and match references between this
and body (made during removal) and insert mounting
pins 3 until it is under the level of gear ring.
• Place bearing 5 and thrust ring 4 (4+5+4) on side B.
NOTE: Lubricate with grease the bearing and thrust ring. Use
grease EP 0 (NLGI consistency 0; soap type Lithium;
base oil Mineral).
• Insert shaft A from side B, complete with seals 8 and
10 and guide ring 9, engage it with piston P by refer-
ring to previously marked tooth.
NOTE: During this operation pay attention to the sealing ele-
ments between the shaft A and piston P.
• Place bearing 5 and thrust ring 4 (4+5+4) on side A.
• Screw flange F, with seal 10 and guide rings 9, until the
reference and the gap between shaft and flange do not
match (clamp the shaft using the holes Ø6 on the
head).
• Put the pins S.
• Install any plugs and bleeder screws on the body (eg:
1, 2).
• Install valve V and details M.
• Check that there isn’t air inside the actuator. To get out
any internal air put the actuator in horizontal position
with the axis of rotation, with the attacks facing up and
make several rotations (10/20).
• To assure the oil exchange within the system during
the work the volume of the connecting pipes must be
lower than the actuator displacement.
• Align the fixing holes of structure/machine to those of
structure/actuator flange and lock this position by pins/
screws of suitable torque.
• Connect the rotary actuator as per layout on the draw-
ing.