JLG 4017PS Service Manual - Manual (Page 45)

3-7 3706PS, 3707PS, 4014PS, 4017PS, 33.7, 37.6, 37.7
Boom
6. Support the lift/lower cylinder (1) and remove the
lock bolt (2) and then the rod end pin (3). Lower the
lift/lower cylinder onto the frame rails.
7. Remove the lock bolt (4) and pin (5) from the barrel
end of the compensating cylinder (6) on the first
boom section. Rest the cylinder on the machine
frame.
8. Remove the lock bolt (7) and pivot pin (8) from rear
of first boom section.
9. Lift the first boom section off machine and set on
level ground or supports being careful not to damage
the tubes on the bottom of the boom.
10. Inspect the boom and welds. Consult the local JLG
dealer if structural damage is detected.
11. Inspect hoses, hardware, wear pads, mounting
points and other components visible with the first
boom section. Replace any item if damaged.
12. Inspect all wear pads for wear. Refer to Section
3.17.1, “Wear Pad Inspection.”
3.3.5 Extend/Retract Cylinder Removal
1. Secure the second boom section on suitable
supports.
2. Remove the retaining rings (1) from the rod end
(front) of the extend/retract cylinder (2).
3. Remove the extend/retract cylinder mounting pin (3).
4. Place a sling around the barrel end of the extend/
retract cylinder.
5. Pull the extend/retract cylinder out of the second
boom section approximately half way.
6. Support the barrel end of the extend/retract cylinder
and reposition the sling toward the center or
balancing point of the extend/retract cylinder. Note
the location of the sling for installation.
7. Remove the extend/retract cylinder and place on
level ground or suitable supports.
MAM0630
3
2
1
MAM0640
4
5
6
MAM0670
7
8
MAM0660
3
1
1
2