JLG 4017PS Service Manual - Manual (Page 54)

Boom
3-16 3706PS, 3707PS, 4014PS, 4017PS, 33.7, 37.6, 37.7
5. Install the clevis bracket (4), two spacers (5) and two
circlips (6), previously removed from the extend
chains (7).
6. Install both extend chains (7) to the top of the first
boom section
7. Install the locknuts and jam nuts (8) to the extend
chains (7) and allowing the extend chains to hang
out over the rear of the first boom section. Do Not
tighten the lock nuts and jam nuts at this time.
8. Lay the extend/retract cylinder hoses, tilt hoses,
auxiliary/electrical hoses behind the second and
third boom sections being careful to protect the
hoses against being damaged when installing the
second and third boom sections into the first boom
section.
9. Carefully slide the hoses and the two boom sections
into the first boom section. Leave 152 mm-203 mm
(6 in-8 in) in of the two boom sections out to be able
to install the wear pad block and the wear pads in
the front of the first boom section
10. Install the wear pads, spacers and shims at the front
of the first boom section. Apply Loctite ® 242 TM and
torque the wear pad mounting bolts to 92-106 Nm
(68-78 lb-ft).
11. Connect both extend chains (1) at the rear of the
third boom section.
12. Feed the extend/retract hoses, tilt hoses and
auxiliary/electrical hoses between the second and
first boom sections.
13. Connect the extend/retract hoses, tilt hoses and
auxiliary/electrical hoses to the proper tubes on the
bottom of the first boom section.
14. Install the hose stop bracket (2).
15. Install the lock nut and jam nut (3) on the retract
chain at the front of the first boom section.
16. Tighten all hose clamps.Connect the auxiliary hoses
to the quick disconnects on the side of the boom
head. Connect the electrical cable to the plug
mounted below the auxiliary quick disconnects if
equipped.
17. Install the tilt cylinder in the boom head, install the
mounting pin and keeper bolt, locking the mounting
pin and tilt cylinder into position.
18. Connect the tilt cylinder hoses to the proper fittings
on the tilt cylinder.
MAM0721
7
8
5
4
6
MAM0880
2
1
MAM0690
3
9