JLG 4017RS Service Manual - Manual (Page 62)

Boom
3-22 3614RS, 4017RS
10. Inspect hardware, wear pads, mounting points, chains
and other components visible with the second boom
section. Replace any item if damaged. (Refer to Section
3.15, “Boom Extend and Retract Chains - 3614RS &
4017RS,” and Section 3.16.1, “Wear Pad Inspection.”)
11. It is recommended that if any chain or hose is damaged
that ALL chains or hoses are replaced.
3.10.4 Fourth Boom Section Removal
1. Verify the boom assembly is setting on stable, secure
and suitable supports.
2. At the rear of the boom, loosen and remove the hose
brackets (18) attached to the third boom section
securing tilt hoses (19) and (if equipped) the auxiliary
hoses (20). Label, disconnect and cap both Tilt hoses
and (if equipped) both Auxiliary hoses. Cap all fittings to
prevent dirt and debris from entering the hydraulic
system.
3. Remove the clip and pin from the retract chain clevis
(21) that is attached to the rear of the fourth section
boom. Lay the retract chain over the rear of the third
boom section.
4. Remove the retract chain from top of third boom
section. Clean and inspect chain. Replace if damaged.
5. Loosen and remove the two bolts securing the hose
carrier (22) to the third boom section.
6. At the top front of the third boom section (23), Lay the
extend chain and clevis (24) over the front of the fourth
boom section.(25).
7. Remove the top wear pads, shims and backing plate
from the third boom section. Label and tag each set of
wear pads being removed.
8. Remove all wear pads, shims and backing plates from
the front of the third boom section. Label and tag each
set of wear pads being removed.
9. Place a sling around the front of the fourth boom
section. Lift and slide the two boom sections 75% of the
way out of the third boom section. Set the boom head
down on a suitable support, then center the sling to be
able to balance the two boom sections being removed.
Carefully pull the fourth boom section the remainder of
the way out of the third boom section and set the fourth
boom section down on suitable supports.
MZ7330
18
20
19
22 21
MZ7350
24
23
25